AR0144CSSM00SUKA0-CRBR1 - ON SEMICONDUCTOR

Datasheet

BT900-SA-0x, BT900-SC-0x

Intelligent BTv4.0 Dual-Mode Module

Version 1.11

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

REVISION HISTORY

Version

Date

Notes

Approver

1.0

Initial Version

Jonathan Kaye

1.1

13 Feb 2015

Added system clock and tick count period table.

Jonathan Kaye

1.2

24 Feb 2015

Edits to clarify OTA app download works over VSP (command

mode)

Jonathan Kaye

1.3

01 July 2015

Updated SPP range to reflect Up to 600 kpbs

Ben Whitten

1.4

21 July 2015

Added Tape and Reel information

Maggie Teng

1.5

15 Oct 2015

Updated SIG Qualification section

Jonathan Kaye

1.6

19 Nov 2015

Updated Reel photos with correct labels

Maggie Teng

1.7

01 July 2015

Converted from HIG to Datasheet; changed to new template

Minor updates throughout. Added section on BLE vSP.

Raj Khatri

1.8

30 Aug 2016

Updated Declarations of Conformity

Sue White

1.9

01 Feb 2017

Fixed error to Pin Definition table; removed Do not connect from

the Comment column of Pin 39

Raj Khatri

1.10

03 May 2017

Updated the Declaration of Conformity with new RED standards

Jonathan Kaye

1.11

04 May 2017

Fixed typo in DoC

Sue White

BT900-Sx 
Datasheet 
Embedded  Wireless  Solutions  Support  Center: 
http://ews-support.lairdtech.com 
www.lairdtech.com/bluetooth 
3 
© Copyright 2017 Laird. All Rights Reserved 
Americas: +1-800-492-2320 
Europe: +44-1628-858-940 
Hong Kong: +852 2923 0610 
 
CONTENTS 
  Overview and Key Features ........................................................................................................................4 
  Specifications .............................................................................................................................................5 
  Hardware Specifications.............................................................................................................................7 
3.1.  Block Diagram and Pin-out .........................................................................................................................7 
3.2.  Pin Definitions ............................................................................................................................................8 
3.3.  Electrical Specifications ........................................................................................................................... 13 
  Power Consumption ................................................................................................................................ 18 
  Functional Description ............................................................................................................................ 20 
5.1.  Power Management (includes brown-out and power-on-reset) ............................................................ 20 
5.2.  Clocks and Timers .................................................................................................................................... 21 
5.3.  Memory for smart BASIC Application Code and Data ............................................................................ 21 
5.4.  RF ............................................................................................................................................................. 21 
5.5.  UART Interface ........................................................................................................................................ 22 
5.6.  SPI Bus ..................................................................................................................................................... 23 
5.7.  I2C Interface ............................................................................................................................................ 23 
5.8.  General Purpose I/O, ADC, PWM/FREQ and Host-wakeup .................................................................... 24 
5.9.  nRESET pin ............................................................................................................................................... 25 
5.10.  nAutoRUN pin ......................................................................................................................................... 25 
5.11.  smartBASIC Runtime Engine Firmware Upgrade .................................................................................... 25 
5.12.  Wake-up BT900 ....................................................................................................................................... 25 
5.13.  Low Power Modes ................................................................................................................................... 25 
5.14.  BT and Wi-Fi Coexistence ........................................................................................................................ 26 
5.15.  BLE vSP modes ........................................................................................................................................ 26 
5.16.  BT900-SA On-board Chip Antenna Characteristics ................................................................................. 27 
  Hardware Integration Suggestions .......................................................................................................... 28 
6.1.  Circuit ...................................................................................................................................................... 28 
6.2.  PCB Layout on Host PCB - General .......................................................................................................... 30 
6.3.  PCB Layout on Host PCB for BT900-SA .................................................................................................... 30 
6.4.  External Antenna Integration with BT900-SC ......................................................................................... 31 
  Mechanical Details .................................................................................................................................. 32 
  Application Note for Surface Mount Modules ........................................................................................ 34 
8.1.  Introduction ............................................................................................................................................ 34 
8.2.  Shipping ................................................................................................................................................... 34 
8.3.  Reflow Parameters .................................................................................................................................. 38 
  FCC and IC Regulatory Statements .......................................................................................................... 40 
  Japan (MIC) Regulatory ........................................................................................................................... 43 
  CE Regulatory .......................................................................................................................................... 43 
  EU Declarations of Conformity ................................................................................................................ 44 
  Ordering Information .............................................................................................................................. 45 
  Bluetooth SIG Qualification ..................................................................................................................... 45 
  Additional Assistance .............................................................................................................................. 46 
 

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

OVERVIEW AND KEY FEATURES

BT900 Series modules from Laird make it easy to add Classic BT and Bluetooth Low Energy (BLE) functionality to

small, portable, power-conscious devices, including those powered by batteries. The fully approved,

programmable modules feature Laird’s innovative, event-driven smartBASIC programming language, which

significantly reduces OEM development risk and speeds time to market.

Based on the Cambridge Silicon Radio (CSR) 8811 silicon and a low power Cortex M3 microcontroller, the BT900

modules provide exceptionally low power consumption with outstanding wireless range, all within a compact

footprint of 19 mm x 12.5 mm. The modules incorporate all the hardware and firmware required to support

development of Dual Mode applications, including:

▪ Complete radio hardware

▪ UART, I2C, SPI, ADC, and GPIO interfaces

▪ Embedded BTv4.0 software stack

– Classic BT profile - SPP

– GATT Client and Peripheral modes

What makes the modules truly innovative is smartBASIC, an event-driven programming language that enables

standalone operation of the module. Laird has extended the implementation of smartBASIC from the popular

BL6xx series of single mode BLE modules into the BT900 series. This allows developers the flexibility of utilising

the Core and BLE specific smartBASIC functions from the BL6xx series to create fully interchangeable BLE

applications between these product ranges.

Without the need for any external processor, a simple smartBASIC application encapsulates the complete end-to-

end process of reading, writing, and processing of sensor data and then using Classic Bluetooth or BLE to transfer

it to / from any Bluetooth device. Ultimately smartBASIC accelerates initial development, creation of prototypes,

and mass production by providing you with your own Bluetooth expert within the module.

In addition to carrying FCC modular, IC, CE and MIC approvals, BT900 modules are fully qualified as a Bluetooth

product, enabling designers to integrate the modules in devices without the need for further Bluetooth testing. A

low-cost developer’s kit including simple software tools simplifies module integration and guarantees the fastest

route to market.

Features and Benefits

Application Areas

▪ Bluetooth v4.0 - Dual Mode (Classic Bluetooth and BLE)

▪ External or Internal Antennas

▪ smartBASIC programming language

▪ Full Bluetooth EPL

▪ Compact Footprint

▪ Programmable TX power 8 dBm to -20 dBm

▪ RX sensitivity: -90 dBm

▪ Ultra low power consumption

▪ TX: 85 mA peak (at +8dBm)

▪ Standby Doze: 2.8 mA (see Power Consumption Note 2)

▪ Deep Sleep: 2.7 uA

▪ UART, GPIO, ADC, PWM, FREQ output, TIMERS, I2C, and SPI

interfaces

▪ Fast Time to Market

▪ FCC, CE, IC, and Japan certified; other certs on request

▪ No external components required

▪ Medical devices

▪ Wellness devices

▪ Automotive Diagnostic

Equipment

▪ Bar Code Scanners

▪ Industrial Cable Replacement

▪ Home automation

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

SPECIFICATIONS

2.1. Specification Summary

Table 1: Specifications

Categories

Feature

Implementation

Control Protocols

Any that can be implemented using smartBASIC

vSP – Virtual Serial Port for BLE – select Command Mode or

Bridge Mode.

FW upgrade

smartBASIC runtime engine

FW upgrade

Via UART

Coexistence

802.11 (Wi-Fi)

3 wire CSR schemes supported

(Unity-3 for classic BT, Unity-3e for BLE)

Operating Modes

Self-contained Run Mode

Selected by nAutoRUN pin status:

LOW (0V). Then runs $autorun$ (smartBASIC application) if it

exists.

Interactive Development

Mode

HIGH (VCC). Then runs via at+run (and “file name” of

smartBASIC application script).

Supply Voltage

Supply

1.8V – 3.6V (Note 6)

1.8V operation not supported in current FW. 3.3V operation

only (2.8V-3.6V).

Power Consumption

Current

Max Peak Current (TX Power @ +8 dBm TX): 85 mA

Standby Doze (waitevent) – 2.8mA (at 4MHz clock) (Note 5)

Deep Sleep – 2.7 uA (external signal wakeup) See Note 5

User Configurable

Clocking

User configurable clocking (40MHz, 20MHz, 4MHz), so user

can reduce current consumption further.

Physical

Dimensions

19 mm x 12.5 mm x 2.5 mm; Pad Pitch 0.8 mm

Environmental

Operating

-40°C to +85°C

Storage

-40°C to +85°C

Miscellaneous

Lead Free

Lead-free and RoHS compliant

Warranty

One Year

Development Tools

Development Kit

Development board and free software tools

Software Tools

Utilities

Windows, Android and iOS applications

UART Firmware Upgrade

Approvals

Bluetooth®

Complete Declaration ID

FCC / IC / CE / MIC

All BT900 Series

Module Specification Notes:

Note 1

DSR, DTR, RI, and DCD can be implemented in the smartBASIC application.

Note 2

With I2C interface selected, pull-up resistors on I2C SDA and I2C SCL must be connected externally as per I2C

standard.

Note 3

SPI interface (master) consists of SPI MOSI, SPI MISO, and SPI CLK. SPI CS is created by using any spare SIO pin

within the smartBASIC application script allowing multi-dropping.

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Module Specification Notes:

Note 4

The BT900 module comes loaded with smartBASIC runtime engine firmware but does not come loaded with

any smartBASIC application script (as that is dependent on customer-end application or use). Laird provides

many sample smartBASIC application scripts covering the services listed. Additional BLE services are being

added every quarter.

Note 5

Deep sleep consumes 2.7uA of power when the BT900 internal radio chip 32.768kHz is used. The smartBASIC

runtime engine firmware has SIO (DIO default function) input pins that are PULL-UP enabled by default. You

may disable the internal PULL_UP through a smartBASIC application script.

Note 6

1.8V operation not supported in current smartBASIC runtime engine FW. 3.3V operation only (2.8V-3.6V).

HARDWARE SPECIFICATIONS

3.1. Block Diagram and Pin-out

smartBASIC

run-time engine

(provides safe access to

BT/BLE stack, drivers and

non-vol stores)

Non-Vol

File

System

for

smartBASIC

Apps

Non-Vol

Data

Store

I/O, UART,I2C,SPI Drivers

UART ADC I2C SPI

OR UFL

Internal

Antenna

47 connection pads

RAM

Flash

GPIO/PWM

Blutooth 4.0 Radio

( Classic BT & BLE )

User smartBASIC Application

Example App

PRINT "Laird BT900 Module"

WaitEvent

Bluetooth Classic

Bluetooth Low Energy

Stack

Serial Flash

(SPI)

ARM Cortex M3

running

smartBASIC

32.768Khz

Crystal

Figure 1: Functional HW and SW block Diagram for BT900 series Dual-Mode BT/ BLE smartBASIC module

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Figure 2: BT900-Sx module pin-out (top view)

3.2. Pin Definitions

Table 2: Pin definitions

Name

Default

Funct.

Alternate

Funct.

Default

Direction

Supply

Domain

Internal

Pull-up or

Pull-down

State

Notes

Comment

UART_CTS

UART

SIO_3

or WKUP4

or Ext

Interrupt

VCC

Pull-up

1, 2, 6,

7, 12

SIO_4

DIO

VCC

Pull-up

Laird Devkit:

UART_DTR

via CON12

nAutoRUN

SIO_22 or

Ext

Interrupt

VCC

Pull-up

ONLY

1, 2,

Laird Devkit:

UART_DSR

via CON12

SIO_5

DIO

Ext

Interrupt

VCC

Pull Up

1, 2,

Laird Devkit:

UART_DCD

via CON12

VCC

1.75V-3.6V

See Table 4

GND

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Name

Default

Funct.

Alternate

Funct.

Default

Direction

Supply

Domain

Internal

Pull-up or

Pull-down

State

Notes

Comment

SIO_6

DIO

SPI MISO

VCC

Pull Up

1, 2, 6,

SPIOPEN() in

smartBASIC

selects SPI function,

MOSI and CLK

are outputs when

in SPI master mode.

See Note 9

SIO_7

DIO

SPI MOSI

VCC

Pull Up

1, 2, 6,

SIO_8

DIO

Ext

Interrupt

VCC

Pull Up

1, 2,

Laird Devkit:

UART_RI

via CON12 or

SPI_CS via CON16

SIO_9

DIO

SPI CLK

VCC

Pull Up

1, 2, 6,

SIO_10

DIO

I2C SDA

VCC

Pull Up

1, 2, 6,

I2COPEN() in

smartBASIC

selects

I2C function

SIO_11

DIO

I2C SCL

VCC

Pull Up

1, 2, 6,

GND

SIO_12

DIO

FREQ or

PWM

VCC

Pull Up

1, 2,

Laird Devkit:

Buzzer output

via CON15

SIO_13

DIO

FREQ or

PWM

VCC

Pull Up

1, 2,

Laird Devkit:

Button1 input

nRESET

VCC

Pull Up

System Reset

(Active low)

SIO_14

DIO

*****

VCC

N/A

2, 14

SIO_15

DIO

VCC

Pull Up

SIO_16

DIO

*****

VCC

N/A

2, 14

SIO_17

DIO

FREQ or

PWM

VCC

Pull Up

1, 2,

Laird Devkit:

LED1 via CON14

SIO_18

DIO

VCC

Pull Up

Laird Devkit:

LED2 via CON14

SIO_19

DIO

VSP

VCC

Pull Up

1, 2,

Pull to GND externally

(at power-up) to

enter VSP Command

mode (enable OTA

functionality)

GND

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Name

Default

Funct.

Alternate

Funct.

Default

Direction

Supply

Domain

Internal

Pull-up or

Pull-down

State

Notes

Comment

SIO_20

DIO

AIN

(ADC01) or

WKUP1 or

Ext

Interrupt

VCC

Pull Up

1, 2, 3,

4, 12

Laird Devkit:

Button 2 input;

Trim Pot

via CON14

SIO_21

DIO

AIN

(ADC00)

VCC

Pull Up

1, 2, 3,

Laird Devkit:

Temp Sensor

input via CON14

AVCC

1.7V-3.6V

See Table 4

Reserved for

future use.

Do NOT connect.

AVREF

See Table 4

GND

BT_VREG_IN_HV

only

3.3V

See Table 4

BT_VREG_OUT_

DIO

only

1.8V

See Table 4

GND

DIO

BT_Ext_DS_CLK

DIO

BT_VDD_I

Weak Pull-

down

Do not connect

BT_NC

DIO

OUT

BT_VDD_I

Weak Pull-

down

Do not connect

BT_NC

DIO

OUT

BT_VDD_I

Weak Pull-

down

Do not connect

BT_NC

OUT

BT_VDD_I

Weak Pull-

down

Do not connect

BT_NC

BT_VDD_I

Weak Pull-

down

Do not connect

BT_ACTIVE

DIO

OUT

BT_VDD_I

Weak Pull-

down

WLAN_ACTIVE

DIO

INs

BT_VDD_I

Weak Pull-

down

Also called

WLAN_DENY

BT_#SEL

DIO

BT_VDD_I

Weak Pull-

down

Must add 100K

to GND externally

BT_PRIORITY

DIO

OUT

BT_VDD_I

Weak Pull-

down

Also called

BT_STATUS

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Name

Default

Funct.

Alternate

Funct.

Default

Direction

Supply

Domain

Internal

Pull-up or

Pull-down

State

Notes

Comment

BT_VDD_IO

only

3.3V or

1.8V

See Table 4

UART_RX

DIO

SIO_0

or WKUP2

VCC

Pull-up

1, 2, 6,

7, 12,

UARTCLOSE()

selects DIO

functionality

and UARTOPEN()

selects

UART comms

behaviour

UART_TX

DIO

SIO_1

OUT

VCC

Set high in

1, 2, 6,

7, 15

UART_RTS

DIO

SIO_2

OUT

VCC

Set low in

1, 2, 6,

7, 15

GND

Module Pin Notes:

Note 1

Alternate function is selectable in the smartBASIC application.

Note 2

DIO – Digital Input or Output. I/O voltage level tracks VCC

Note 3

AIN – Analog Input.

Note 4

DIO or AIN functionality is selected using the GpioSetFunc() function in smartBASIC.

Note 5

AIN configuration selected using GpioSetFunc() function.

Note 6

I2C, UART, SPI controlled by xxxOPEN() functions in smartBASIC

Note 7

SIO_0 to SIO_3 are DIO by default when $autorun$ app runs on power up.

Note 8

Pull the nRESET pin low for minimum 500 nS in order for the BT900 to reset.

The BT900 module start-up time is ~1.6 seconds. Start-up time is the time taken from power-up to being able

to run a smartBASIC command. Out of this, 1.6 seconds, ~1.3 seconds is for radio initialisation. 1.6 seconds is

also the time when coming out of reset through AT command (ATZ) or AT command for factory default (at&f*).

For robustness against external interference, you must fit an external pull-up resistor (10K) on nRESET (pin 16)

to VCC for BT900 to be out of reset. By default, the module is out of reset (internal weak-pull-up, 33k) when

power is applied to the VCC pin

Note 9

SPI CS is created by the customer using any spare SIO pin within their smartBASIC application script allowing

multi-dropping.

Note 10

It is possible to download smart BASIC applications Over the Air (OTA) to the BT900. To enable this feature,

SIO_19 must be pulled low to GND externally (on power up). Refer to the firmware release documentation for

details.

Note 11

You must connect 100 K pull-down resistor on BT_#SEL externally to GND.

Note 12

UART_CTS (pin 1), UART_RX (pin 44) and SIO_20/ADC01 (pin 24) are WKUP (wake-up) pins that allow the

BT900 module to be woken up from Deep Sleep by the host. smartBASIC function will be added in the future to

allow you to select which WKUP pin (or all) from which to wake up.

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Module Pin Notes:

Note 13

PWM output signal is an alternative function on SIO_12, SIO_13 and SIO_17. FREQ output signal is an

alternative function on SIO pins SIO_12, SIO_13, SIO_17. Up to three SIO pins are allowed to output FREQ

signal or PWM signal. Refer to smartBASIC User Guide for details.

Note 14

It is mandatory that you specifically set script SIO_14 and SIO_16 as either input or output in your smartBASIC

application to make SIO_14 and SIO_16 as GPIO's.

Note 15

smartBASIC runtime engine firmware has DIO (default function) input pins that are PULL-UP enabled by

default. You can disable internal PULL_UP through your smartBASIC application script All the SIO pins (with a

default function of DIO) are mostly inputs (unless stated otherwise in Table 2) – with no internal pull-up. SIO_1

and SIO_2 are outputs:

▪ SIO_1 (alternative function UART_TX) is an output, set high (in FW)

▪ SIO_2 (alternative function UART_RTS) is an output, set low (in FW)

▪ SIO_0 (alternative function UART_RX) is an input, set with internal

▪ SIO_3 (alternative function UART_CTS) is an input, set with internal pull-up

▪ SIO_19 is an input, needs an external pull-down. It is used for download smart BASIC applications over-

the-air. See the latest FW release documentation for details.

Note 16

1.8V operation not supported in current smartBASIC runtime engine FW hence Customer must operate BT900

from nominal 3.3V supply (2.8V-3.6V, refer to Table4, note4). To operate BT900 from 3.3V connect the external

3.3V supply to pin 31 (BT_VREG_IN_HV), pin 5 (VCC), and pin 43 (BT_VDD_IO). Customer MUST leave pin 32

(BT_VREG_OUT_HV) unconnected.

Note 17

Dedicated BT900 BT-WiFi coexistence pins for CSR scheme Unity3 (used for classic BT) and Unity3e (used for

BLE). Refer to smartBASIC user manual for details on how to enable coexistence.

The BT900 module is delivered with the integrated smart BASIC runtime engine FW loaded (but no onboard

smartBASIC application script). Because of this, it starts up in AT command mode by default.

At reset, all SIO lines are configured as the defaults shown above.

SIO lines can be configured through the smart BASIC application script to be either inputs (with pull-ups or none)

or outputs. When an alternative SIO function is selected (such as I2C or SPI), the firmware does not allow the setup

of internal pull-up. Therefore, when I2C interface is selected, pull-up resistors on I2C SDA and I2C SCL MUST be

connected externally as per I2C standard.

UART_RX, UART_TX, UART_CTS are 3.3 V level logic (if VCC is 3.3 V, i.e. SIO pin I/O levels track VCC). For example,

when RX and TX are idle, they sit at 3.3 V (if VCC is 3.3 V). Conversely, handshaking pins CTS and RTS at 0 V are

treated as assertions.

Pin 3 (nAutoRUN) is an input, with active low logic. In the development kit (DVK-BT900-sx) it is connected so that

the state is driven by the host’s DTR output line. The nAutoRUN pin must be externally held high or low to select

between the following two BT900 operating modes:

▪ Self-contained Run mode (nAutoRUN pin held at 0 V).

▪ Interactive / development mode (nAutoRUN pin held at VCC).

smartBASIC runtime engine firmware checks for the status of nAutoRUN during power-up or reset. If it is low and

if there is a smartBASIC application script named $autorun$, then the smartBASIC runtime engine FW executes

the application script automatically; hence the name Self-contained Run Mode.

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

3.3. Electrical Specifications

3.3.1. Absolute Maximum Ratings

Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the module are listed

below. Exceeding these values causes permanent damage.

The average SIO pin output current is defined as the average current value flowing through any one of the

corresponding pins for a 100mS period. The total average SIO pin output current is defined as the average current

value flowing through all of the corresponding pins for a 100mS period. The maximum output current is defined

as the value of the peak current flowing through any one of the corresponding pins.

Table 3: Maximum Current Ratings

Parameter

Min

Max

Unit

Voltage at VCC pin

-0.3

+3.6

AVCC

VSS-0.5

VSS+4.6

AVREF

VSS-0.5

VSS+4.6

BT_VREG_IN_HV

2.3

4.8

BT_VREG_OUT_HV

1.7

2.0

BT_VDD_IO

-0.4

3.6

Voltage at GND pin

Voltage at SIO pin

-0.3

VCC+0.3

SIO “L” level average output current

SIO “H” level average output current

-4

SIO “L” level maximum output current

SIO “H” level maximum output current

-10

SIO “L” level total average output current

SIO “H” level total average output current

-50

SIO “L” level total maximum output current

100

SIO “H” level total maximum output current

-100

Storage temperature

-40

+85

ºC

3.3.2. Recommended Operating Parameters

Table 4: Power Supply Operating Parameters

Parameter

Min

Typ

Max

Unit

VCC (Note 1, Note4)

1.75

3.3

3.6

AVCC (AVCC=VCC) (Note 1)

1.75

3.3

3.6

AVREF1 (when AVCC>=2.7V

AVREF1 (when AVCC<2.7V)

2.7V AVCC

AVCC AVCC

VCC Maximum ripple or noise (Note 2)

<10%of VCC

VCC rise time (0 to 1.8V) (Note 2)

0.1

VCC shut down time (1.8V to 0V) (Note 2)

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Parameter

Min

Typ

Max

Unit

BT_VREG_IN_HV (Note 4)

2.3

3.6

BT_VREG_OUT_HV (Note 4)

1.75

1.95

BT_VDD_IO (Note 4)

1.2

3.6

Operating Temperature Range

-40

+85

ºC

Recommended Operating Parameters Notes:

Note 1

Notes on power on. Turn on/off in the following order or at same time.

Turning on: VCC > AVCC > AVRH. Turning off: AVRH > AVCC > VCC.

If not using the ADC convertor, connect AVCC and AVREF=VCC.

1.8V operation is not supported in current smartBASIC runtime engine FW, see Note 4.

Note 2

The maximum VCC ripple or noise (at any frequency) should not exceed 10% of VCC. Ensure transient

fluctuation rate does not exceed 0.1V/uS.

Note 3

nRESET input time is minimum 500nS. Customer must fit an external pull-up resistor (10K) on nRESET (pin 16)

to VCC for BT900 to be out of reset. BT900 module start-up time is ~1.6 seconds; start-up time is the time

taken from power-up to being able to run a smart BASIC command. Most of this is for radio initialisation. 1.6

seconds is also the time when coming out of reset through AT command (atz) or AT command for factory

default (at&f*).

Note 4

The Bluetooth chip in the BT900 has two internal regulators, a high voltage (input pin BT_VREG_IN_HV) and

low voltage (input pin BT_VREG_OUT_HV) regulator. ONLY ONE regulator MUST be used to power the radio

chip.

▪ Method 1: If the BT900 is required to operate from 3.3V, connect the external 3.3V supply (2.8V-3.6V) to

pin 31 (BT_VREG_IN_HV), pin 5 (VCC), and pin 43 (BT_VDD_IO). Customer MUST leave pin 32

(BT_VREG_OUT_HV) unconnected.

▪ Method 2: If the BT900 is required to operate from 1.8V, connect the external 1.8V supply (1.75V-1.95V)

to pin 32 (BT_VREG_OUT_HV), pin 5 (VCC) and pin 43 (BT_VDD_IO). Customer MUST leave pin 31

(BT_VREG_IN_HV) unconnected.

Note that 1.8V operation is not supported in current smartBASIC runtime engine FW.

Table 5: Signal Levels for Interface, SIO

Parameter

Condition

Min

Typ

Max

Unit

VIH Input high voltage

VCC < 2.7V

VCC ≥ 2.7V

0.7VxCC

0.8VxCC

VCC+0.3

VIL Input low voltage

VCC < 2.7V

VCC ≥ 2.7V

VSS-0.3

0.3xVCC

0.2xVCC

VOH Output high voltage

(std. drive, 4mA) See Note 1

VCC < 2.7V

VCC ≥ 2.7V

VCC-0.45

VCC-0.5

VCC

VOL Output low voltage

(std. drive, 4mA)

VCC < 2.7V

VCC ≥ 2.7V

VSS

0.4

Pull up resistance

VCC < 2.7V

VCC ≥ 2.7V

134

kΩ

Input capacitance

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Signal Levels for Interface, SDIO Notes:

Note 1

mA is the total average SIO pin output current which is defined as the average current value flowing through all

of the corresponding pins for a 100mS period.

Table 6: SIO pin alternative function AIN (ADC) specification

Parameter

Min

Typ

Max

Unit

AVCC (AVCC = VCC)

1.75

3.3

3.6

AVCC current draw (ADC 1 unit operation)

0.27

0.42

AVCC current draw (ADC stop)

0.03

AVREF (when AVCC ≥ 2.7V

2.7 V

AVCC

AVREF (when AVCC < 2.7V)

AVCC

AVREF current draw (ADC 1 unit operation)

0.72

1.29

AVREF current draw (ADC stop)

0.02

2.6

ADC input pin (AIN) voltage maximum

VSS

AVREF

ADC input port (AIN) current draw

Time required to convert single sample

12 bit mode

ADC input resistor impedance (during operation) (Note 1)

AVCC ≥ 2.7V

2.2

kOhm

1.8V ≥ AVCC < 2.7V

5.5-10.5

kOhm

ADC input capacitance impedance

(during operation)1

9.4

SIO Pin Alternative Function AIN (ADC) Specification Notes:

Note 1

ADC input impedance is estimated mean impedance of the ADC (AIN) pins. The ADC is highly sensitive to the

impedance of the source. The ADC (AIN) input impedance is 2.2-10.5k. Normally, when not sampling, the ADC

(AIN) impedance will have very high value and can be considered an open circuit. The moment ADC is sampling,

ADC(AIN) impedance is 2.2-10.5k.

Figure 3: ADC Diagram

Rext: Output impedance of external circuit (kOhms)

BT900-Sx

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Rext: Sampling time (nS)

Ts ≥ (RAIN + Rext) x CAIN x 9

RAIN: Input resistor of ADC(kOhms)=2.2kOhms at 2.7V≤AVCC≤3.6V

Input resistor of ADC(kOhms)=5.5kOhms at 1.8V≤AVCC≤2.7V

CAIN: Input capacity of ADC(pF)=9.4pF at .8V≤AVCC≤3.6V

You must fit an external series resistor (Rext) when using ADC pins, whose value is selected to get required Sample

Time (Ts). 1K to 10K may be suitable.

Table 7: Digital I/O characteristics (ONLY those BT900 IO pins with names beginning with “BT_”)

Normal Operation

Min

Typ

Max

Unit

Input Voltage

VIL input logic level low

-0.4

0.4

VIH input logic level high

0.7 x BT_VDD_IO

BT_VDD_IO+ 0.4

Output Voltage

VOL output logic level low, IOL = 4.0 mA

0.4

VOH output logic level high, IOL = 4.0 mA

0.75 x BT_VDD_IO

Input and Tristate Currents

Strong pull-up

-150

-40

-10

µA

Strong pull-down

150

µA

Weak pull-up

-5

-1.0

-0.33

µA

Weak pull-down

0.33

1.0

5.0

µA

CI input capacitance

1.0

5.0

This table applies to those BT900 pins ONLY with names beginning with BT_:

▪ BT_Ext_DS_CLK (pin 34)

▪ BT_NC (pin 35)

▪ BT_NC (pin 36)

▪ BT_NC (pin 37)

▪ BT_NC (pin 38)

▪ BT_ACTIVE (pin 39)

▪ WLAN_ACTIVE (pin 40)

▪ BT_#SEL (pin 41)

▪ BT_PRIORITY (pin 42)

Note: BT900 IO pins with names beginning with BT_ internal pull-up and pull-down resistors are not user-

configurable via the smartBASIC application.

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

3.3.3. nAutoRUN Pin and Operating Modes

Operating modes (refer to the smart BASIC manual for details):

▪ Self-contained mode

▪ Interactive / Development mode

Table 7: nAutoRUN pin

Signal Name

Pin No

I/O

Comments

nAutoRUN

Input with active low logic.

Operating mode selected by nAutoRun pin status:

If Low (0V), runs $autorun$ if it exists;

If High (VCC), runs via at+run (and “file name” of application).

Pin 3 (nAutoRUN) is an input, with active low logic. In the development board (DVK-BT900-sx) it is connected so

that the state is driven by the host’s DTR output line. nAutoRUN pin needs to be externally held high or low to

select between the two BT900 operating modes:

▪ Self-contained Run mode (nAutoRUN pin held at 0V).

▪ Interactive / Development mode (nAutoRUN pin held at VCC)

The smartBASIC runtime engine firmware checks for the status of nAutoRUN during power-up or reset. If it is low

and if there is a smartBASIC application named $autorun$ then the smartBASIC runtime engine executes the

application automatically; hence the name self-contained run mode.

3.3.4. OTA (Over the Air) smart BASIC application download

It is possible to download smart BASIC applications Over the Air (OTA) to the BT900. To enable this, SIO_19 must

be pulled low to GND externally (on power up). OTA smartBASIC download is possible from a remote host when

in vSP command mode only.

The OTA smart BASIC application download is useful because it allows the module to be soldered into an end

product without pre-configuration; the application can then be downloaded over the air once the product has

been pre-tested. It is the smartBASIC application that is downloaded over the air and NOT the firmware. Since this

is primarily meant for production environments with multiple collocated programming stations, the transmit

power is limited.

Table 8: VSP pin description

Signal Name

Pin No

I/O

Comments

SIO_19

Internal pull up (default).

Enter VSP Command mode by externally pulling SIO_19 pin to GND at power-up. OTA

functionality is enabled through VSP Command mode.

BT900-Sx

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POWER CONSUMPTION

The BT900 module has User configurable clocking (40 MHz, 20 MHz, 4 MHz), so user can reduce current

consumption at expense of speed. The default is 40MHz. Please note that when using the 4MHz clock, the

maximum supported board rate is 115200. This data was taken at VCC 3.3V and a temperature of 25ºC.

4.1. Power Consumption across Clock Frequencies

Table 9: Power consumption at 40MHz, 20MHz, and 4 MHz

Parameter

At 40 MHz

At 20 MHz

At 4 MHz

Unit

Typical

Active Peak current (Note 1)

TX only run peak current @TX power = +8 dBm

TX only run peak current @TX power = +4 dBm

TX only run peak current @TX power = 0 dBm

TX only run peak current @TX power = -4 dBm

TX only run peak current @TX power = -8 dBm

TX only run peak current @TX power = -12 dBm

TX only run peak current @TX power = -16 dBm

TX only run peak current @TX power = -20 dBm

RX only ‘peak’ current

TBD

Low Power Mode 1

Standby Doze (waitevent) (Note 2)

10.7

6.9

2.8

Low Power Mode 2 (Note 3)

Deep Sleep (Note 3)

2.7

Classic BT Mode (Note 5)

Inquiring Mode (AT+BTI)

23.9

19.5

6.4

(Note 6)

Wait for Connection or Discoverable

(Note 6)

BT900 Master Role (connection ACL) (Note 5)

Connecting Mode (ATDxxx)

37.8

29.8

(Note 6)

Connected Mode (No Data Transfer)

20.5

16.3

12.6

(Note 6)

Connected Mode (Max Data Transfer)

12.9

(Note 6)

BT900 Slave Role (connection ACL) (Note 5)

Connecting Mode (ATDxxx)

38.5

32.6

Connected Mode (No Data Transfer)

35.3

30.7

22.7

(Note 6)

BT900-Sx

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Parameter

At 40 MHz

At 20 MHz

At 4 MHz

Unit

Typical

Connected Mode (Max Data Transfer)

30.4

22.6

11.2

Inquiring (Note 5)

Scan interval: 640 ms, Scan Window: 320 ms

Note 6

Scan interval 1920 ms, Scan Window 960 ms

BLE Mode

Active Mode Average Current (Note 4)

Advertising Average Current Draw

Maximum with advertising interval (min) 20 ms

23.3

12.5

9.8

Minimum with advertising interval (max) 10240 ms

10.6

6.7

2.5

Connection Average Current Draw

Maximum with connection interval (min) 8 ms

17.2

12.4

9.3

with connection interval 68 ms

11.4

7.4

3.2

Minimum with connection interval (max) 4000 ms

10.6

6.7

2.5

Scanning (Note 5)

Active Scan Interval = 80 ms

Scan Window = 40 ms

Power Consumption Notes:

Note 1

Peak current is the current seen only during the duration of radio activity burst where TX is on and transmit

power in Table 9 is transmitted.

Note 2

Standby Doze is entered automatically (when a waitevent statement is encountered within a smartBASIC

application script). In Standby Doze, all enabled peripherals remain on and may re-awaken the chip. The

module wakes up from Standby Doze via an interrupt (such as a received character on the UART Rx line). The

module wakes up every millisecond to service the interrupt. If the module receives a UART character from

either the external UART or the radio, it wakes up.

Note 3

In Deep Sleep, everything is disabled and the only wake-up sources are reset and changed on pins on which

sense is enabled. The current typical consumption is 2.7uA.

smart BASIC runtime engine firmware requires a hardware reset to come out of deep sleep. Firmware allows

the module to transition from Deep Sleep to Standby Doze through GPIO signals through the reset vector.

Enter Deep Sleep mode via a command in your smart BASIC application script.

Note 4

The BLE radio taken with a TX power of 8 dBm and all peripherals off (UART OFF after radio event), slave

latency of 0 (in a connection).

Average current consumption depends on a number of factors including a TX power and VCC accuracy of 26

MHz and 32.768 kHz. With these factors fixed, the largest variable is the advertising or connection interval set.

Factors include:

▪ Advertising Interval range:

– 20 ms to 10240 ms in multiples of 0.625 ms for Advert type=ADV_IND and ADV_DIRECT_IND

– 100 ms to 10240 ms in multiples of 0.625 ms for Advert type=ADV_SCAN_IND and

ADV_NONCONN_IND

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Power Consumption Notes:

– For advertising timeout, if the advert type is ADV_DIRECT_IND, the timeout is limited to 1.28

seconds (1280 ms).

For an advertising event…

– The minimum average current consumption is when the advertising interval is large 10240 mS

(this may cause long discover times for the advertising event by scanners.

– The maximum average current consumption is when the advertising interval is small (around 20

ms).

– Other factors that are also related to average current consumption include the advertising

payload bytes in each advertising packet, as well as whether the BT900 is continuously advertising

or periodically advertising.

▪ Connection Interval range:

– 7.5 ms to 4000 ms in multiples of 1.25 ms.

For a connection event…

– The minimum average current consumption is when the connection interval is large (around 4000

ms)

– The maximum average current consumption is with the shortest connection interval of 7.5 ms; no

slave latency.

Other factors related to average current consumption include whether transmitting 6 packets per

connection interval and if each packet contains 20 bytes (which is the maximum for each packet). An

inaccurate 32 kHz master clock accuracy would increase the average current consumption.

Note 5

Average current measurement using a current shunt IC (on DVK-BT900) and an oscilloscope.

Note 6

At 4 MHz clocking, slower throughput.

FUNCTIONAL DESCRIPTION

The BT900 dual mode (BT/BLE) module is a self-contained Bluetooth Low Energy product and requires only power

and a user’s smartBASIC application to implement full BLE functionality. The integrated, high performance

antenna combined with the RF and base-band circuitry provides the Bluetooth Low Energy wireless link, and any

of the SIO lines provide the OEM’s chosen interface connection to the sensors. The user’s smartBASIC application

binds the sensors to the BLE wireless functionality.

The variety of hardware interfaces and the smartBASIC programming language allow the BT900 module to serve

a wide range of wireless applications, while reducing overall time to market and the learning curve for developing

dual-mode BT/ BLE products.

To provide the widest scope for integration, a variety of physical host interfaces/sensors are provided. The major

BT900 series module functional blocks described below.

5.1. Power Management (includes brown-out and power-on-reset)

Power management features:

▪ System Standby Doze/Deep Sleep modes.

▪ Brownout Reset

▪ Open/Close peripherals (UART, SPI, I2C, SIO’s and ADC) with a command in a smartBASIC application script

▪ Pin wake-up system from Deep sleep

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Power supply features:

▪ Supervisor HW to manage power on reset, brownout (and power fail).

▪ 1.8V to 3.6V operating supply range. 1.8V operation is not supported in current smartBASIC runtime

engine FW.

5.2. Clocks and Timers

5.2.1. Clocks

The integrated high accuracy (+/-20 ppm) 32.768 kHz crystal oscillator provides protocol timing and helps with

radio power consumption in the system Standby Doze/Deep sleep modes by reducing the time that the RX window

must be open. Standard accuracy clocks tend to have lower accuracy +/-250 ppm.

The integrated high accuracy 26 MHz (+/-10 ppm) crystal oscillator helps with Radio operation and also helps

reduce power consumption in the Active modes.

5.2.2. Timers

In keeping with the event driven paradigm of smartBASIC, the timer subsystem enables the writing of smartBASIC

which allows the generation of future events based on timeouts.

▪ Regular Timer – There are eight built-in timers (regular timer) derived from a single multifunction timer

clock which are controlled solely by smartBASIC functions. The resolution of the regular timer is dependent

on the selected system clock frequency can be obtained from Table 10.

Table 10: System Clock and Tick Count Period

System Clock (MHz)

Tick Count Period (uS)

6.4

12.8

▪ Tick Timer – This is a 31-bit free running counter that increments every one millisecond. The resolution of

this counter is dependent on the selected system clock frequency and can be obtained from Table 10.

Refer to the smart BASIC user guide for more information.

5.3. Memory for smart BASIC Application Code and Data

Up to approximately 48 Kb of data memory is available for the smartBASIC application script and up to 4 Kb is

available for data.

5.4. RF

▪ 2402–2480 MHz Bluetooth 4.0 Dual Mode (BT and BLE); 1 Mbps to 3 Mbps over the air data rate.

▪ TX output power of +8 dBm programmable (via smartBASIC command) to -20 dBm in steps of four dB.

▪ Receiver (with integrated channel filters) to achieve maximum sensitivity -90 dBm @ 1 Mbps BLE or Classic

BT, 2 Mbps, 3 Mbps).

▪ RF conducted interface available in 2-ways:

– BT900-SA: RF connected to on-board antenna on the BT900-SA

– BT900-SC: RF connected to on-board uFL RF connector on the BT900-SC

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

▪ Antenna options:

– Integrated monopole chip antenna on the BT900-SA

– External dipole antenna connected with to uFL RF connector on the BT900-SC.

5.5. UART Interface

The Universal Asynchronous Receiver/Transmitter (UART) offers fast, full-duplex, asynchronous serial

communication with built-in flow control support (UART_CTS, UART_RTS) in hardware up to 2 Mbps baud. No

parity checking, 8 data bits, and 1 stop bit are supported.

UART_TX, UART_RX, UART_RTS, and UART_CTS form a conventional asynchronous serial data port with

handshaking. The interface is designed to operate correctly when connected to other UART devices such as the

16550A. The signalling levels are nominal 0 V and 3.3 V (tracks VCC) and are inverted with respect to the signalling

on an RS232 cable.

Two-way hardware flow control is implemented by UART_RTS and UART_CTS. UART_RTS is an output and

UART_CTS is an input. Both are active low.

These signals operate according to normal industry convention. UART_RX, UART_TX, UART_CTS, and UART_RTS

are 3.3 V level logic (tracks VCC). For example, when RX and TX are idle they sit at 3.3 V. Conversely for handshaking

pins CTS, RTS at 0 V is treated as an assertion.

The module communicates with the customer application using the following signals:

▪ Port/TXD of the application sends data to the module’s UART_RX signal line

▪ Port/RXD of the application receives data from the module’s UART_TX signal line

Note: The BT900 serial module output is at 3.3V CMOS logic levels (tracks VCC). Level conversion must be

added to interface with an RS-232 level compliant interface.

Some serial implementations link CTS and RTS to remove the need for handshaking. We do not recommend linking

CTS and RTS except for testing and prototyping. If these pins are linked and the host sends data when the BT900

deasserts its RTS signal, there is significant risk that internal receive buffers will overflow, which could lead to an

internal processor crash. This drops the connection and may require a power cycle to reset the module. We

recommend that you adhere to the correct CTS/RTS handshaking protocol for proper operation.

BT900

UART_TX

UART_RX

UART_CTS

Application - Host

/RXD

/TXD

/RTS

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Table 11: UART Interface

Signal Name

Pin No

I/O

Comments

SIO_1 / UART_TX

SIO_1 (alternative function UART_TX) – Output, set high (in FW).

SIO_0 / UART_RX

SIO_0 (alternative function UART_RX) – Input, set with internal pull-up (in FW).

SIO_2 / UART_RTS

SIO_2 (alternative function UART_RTS) – Output, set low (in FW).

SIO_3 / UART_CTS

SIO_3 (alternative function UART_CTS) – Input, set with internal pull-up (in FW).

The UART interface is also used to load customer developed smart BASIC application script.

UART has a deep buffer (UART_RX deep buffer) of 1024 bytes.

5.6. SPI Bus

The SPI interface is an alternate function on SIO pins, configurable by smart BASIC.

The module is a master device that uses terminals SPI_MOSI, SPI_MISO, and SPI_CLK. SPI_CS is implemented using

any spare SIO digital output pins to allow for multi-dropping. On DVK-BT900 devboard, SIO_8 is used at the SPI_CS.

The SPI interface enables full duplex synchronous communication between devices. It supports a 3-wire

(SPI_MOSI, SPI_MISO, SPI_SCK,) bi-directional bus with fast data transfers to and from multiple slaves. Individual

chip select signals are necessary for each of the slave devices attached to a bus, but control of these is left to the

application through use of SIO signals. I/O data is double buffered.

The SPI peripheral supports SPI mode 0, 1, 2, and 3.

Table 12: Peripheral supports

Signal Name

Pin No

I/O

Comments

SPI_MOSI

This interface is an alternate function configurable by

smart BASIC. Default in the FW pin 8 and 10 are inputs. SPIOPEN() in smart BASIC

selects SPI function and changes pin 8 and 10 to outputs (when in SPI master

mode).

SPI_CS is implemented using any spare SIO digital output pins to allow for multi-

dropping. On DVK-BT900 devboard, SIO_8 (pin9) is used at the SPI_CS.

SPI_MISO

SPI_CLK

5.7. I2C Interface

The I2C interface is an alternate function on SIO pins, configurable by smart BASIC command.

The two-wire interface can interface a bi-directional wired-OR bus with two lines (SCL, SDA) and has master/slave

topology. The interface is capable of clock stretching. Data rates of 100 kbps and 400 kbps are supported.

An I2C interface allows multiple masters and slaves to communicate over a shared wired-OR type bus consisting

of two lines which normally sit at VCC. The BT900 module can only be configured as an I2C master and can be the

only master on the bus. The SCL is the clock line which is always sourced by the master; the SDA is a bi-directional

data line which can be driven by any device on the bus.

IMPORTANT: It is essential to remember that pull-up resistors on both SCL and SDA lines are not provided in

the module and MUST be provided external to the module.

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Table 13: I2C Interface

Signal Name

Pin #

I/O

Comments

I2C_SDA

I/O

This interface is an alternate function on each pin, configurable by

smartBASIC. I2COPEN() in smartBASIC selects I2C function.

I2C_SCL

I/O

5.8. General Purpose I/O, ADC, PWM/FREQ and Host-wakeup

5.8.1. GPIO

The 18 SIO pins are configurable by smartBASIC and can be accessed individually. Each has the following user

configured features:

▪ Input/output direction (output drive strength – 4mA).

▪ For inputs, Internal pull up resistors (33K typical) or no pull-up.

5.8.2. ADC

The ADC is an alternate function on SIO pins and is configurable by smart BASIC.

The BT900 provides access to 2-channel 12-bit incremental ADC. This enables sampling multiple external signals

through a front end MUX. The ADC has configurable input.

Note: Current smartBASIC runtime engine firmware provides access to 12-bit mode resolution.

Analog Interface (ADC)

Table 14: Analog interface

Signal Name

Pin #

I/O

Comments

AIN – Analog Input

This interface is an alternate function on each pin, configurable by

smartBASIC. AIN configuration selected using GpioSetFunc() function.

12 bit resolution.

AIN – Analog Input

PWM and FREQ signal output on up to two SIO pins

The PWM and FREQ output is an alternate function on SIO pins and is configurable by smart BASIC.

The ability to output a PWM (Pulse Width Modulated) signal or FREQ output signal on up to three GPIO (SIO) output pins

available via smartBASIC runtime engine firmware and can be selected using the smart BASIC commandGpioSetFunc().

PWM output signal has a frequency and duty cycle property. PWM output is generated using 32-bit hardware timers. The

timers are clocked by a 4 MHz clock source. Frequency is adjustable (up to 1 MHz) and the Duty cycle can be set over range

from 0% to 100% (both configurable by smart BASIC command).

Note: The frequency driving the two SIO pins is the same but the duty cycle can be independently set for each pin.

FREQ output signal frequency can be set over a range of 0 Hz to 4 MHz (with 50% mark-space ratio).

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

5.9. nRESET pin

Table 15: nRESET pin

Signal Name

Pin No

I/O

Comments

nRESET

BT900 HW reset (active low). Pull the nRESET pin low for

minimum 500 nS in order for the BT900 to reset. By default, the

module is out of reset (internal weak-pull-up, 33k) when power is

applied to the VCC pin

Note: For robustness against external interference, you MUST fit an external pull-up resistor (10K) on nRESET (pin 16) to

VCC for the BT900 to be out of reset. nRESET needs to be held low (0V) for greater than 500 nS to reset the module.

5.10. nAutoRUN pin

Refer to section nAutoRUN pin and Operating Modes regarding operating modes and the nAutoRUN pin.

▪ Self-contained Run mode

▪ Interactive/Development mode

5.11. smartBASIC Runtime Engine Firmware Upgrade

The BT900 software consists of the following:

▪ BT900 smartBASIC runtime engine firware (loaded at production, may be upgraded by the customer).

▪ BT900 smartBASIC application script developed by customer (loaded through UART by the customer).

To allow customer the capability to upgrade the BT900 smartBASIC runtime engine FW to the latest version released from

Laird, the current smartBASIC runtime engine firmware only allows this upgrade via the UART.

5.12. Wake-up BT900

5.12.1. Waking up BT900 from Host

Wake-up the BT900 from the host using wake-up pins (UART_CTS, UART_RX, SIO_20 (ADC01)). Refer to the smartBASIC

user manual for details. You may configure the BT900’s wakeup pins via smartBASIC to:

▪ Wake up when signal is low

▪ Wake up when signal is high

▪ Wake up when signal changes

BT900 also has pins that are external interrupts; refer to the smartBASIC user manual for details.

5.12.2. Wake up Host from BT900

This may be done by use of the BT900 SIO pin. Refer to the smartBASIC user manual for details.

5.13. Low Power Modes

The BT900 has three power modes: Run, Standby Doze and Deep Sleep. Further, the BT900 has user configurable clocking

(40MHz, 20MHz, 4MHz) allowing power consumption trade-off in Run and Standby Doze modes.

The module is placed automatically in Standby Doze if there are no events pending (when waitevent statement is

encountered within a customer’s smartBASIC script). The module will wake up from Standby Doze via an interrupt e.g.

received character on the UART Rx line. The module wakes up every millisecond to service the interrupt. If the module

receives a UART character from either the external UART or the radio, that will cause it to wake up.

Deep sleep is the lowest power mode. Once awakened, the system will go through a system reset.

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

5.14. BT and Wi-Fi Coexistence

The BT900 supports the following CSR BT-WiFi coexistence schemes:

▪ Unity-3 (for use with Classic BT)

▪ Unity-3e (for use with BLE)

Refer to the smartBASIC user manual for details.

5.15. BLE vSP modes

This section discusses VSP Command mode through pulling SIO_19 low and nAutoRUN low externally. Read this

section in conjunction with the VSP Configuration chapter of the BT900 smartBASIC Extensions guide which is

available from the Documentation tab of BT900 product page of the Laird website.

Figure 4 shows the difference between VSP Bridge-to-UART mode and VSP Command mode and how SIO_19 and

nAutoRUN must be configured to select between these two modes.

▪ VSP Bridge-to-UART mode – Sends data (sent from a phone or tablet over BLE) to the BT900 to be sent out

of the BT900 UART (therefore data is not stored on the BT900).

▪ VSP Command mode – Sends data (sent from phone of tablet) to the BT900 and stores that data in the

BT900. The OTA Android or iOS application can be used to download any smartBASIC application script over

the air to the BT900.

Figure 4: Difference between VSP Bridge-to-UART mode and VSP Command mode

Table 16: vSP modes

Mode

SIO_19 pin

nAutoRUN pin

VSP Bridge-to-UART Mode

Externally held LOW

Externally held HIGH

VSP Command Mode

Externally held LOW

SIO_19 Low (externally) selects the VSP service and together, when nAutoRUN is Low (externally), selects VSP

Command mode whilst nAutoRUN High (externally) selects VSP Bridge to UART mode.

When SIO_19 on module is set low (externally), VSP is enabled and auto-bridged to UART when connected.

However, for VSP Command mode, auto-bridge to UART is not required. With SIO_19 set to Low and nAutoRUN

set to Low, VSP Command mode is entered and you can then download the smartBASIC application onto the

module over-the-air from the phone (or tablet).

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

5.16. BT900-SA On-board Chip Antenna Characteristics

The BT900-SA on-board chip monopole antenna’s radiated performance depends on the host PCB layout.

The BT900 development board was used for BT900 development and antenna performance evaluation. To obtain

similar performance, follow the guidelines in the PCB Layout on Host PCB for BT900-SA section to allow the on-

board antenna to radiate and reduce proximity effects due to nearby host PCB GND copper or metal covers.

BT900-SA on-board antenna datasheet is available here:

http://www.acxc.com.tw/product/at/at3216/AT3216-B2R7HAA_S-R00-N198_2.pdf

Antenna performance on DVK-BT900-V01 development board is shown below.

Peak Gain

Avg. Gain

XY-plane

-2.6

-7.4

Peak Gain

Avg. Gain

XZ-plane

-2.8

-5.9

BT900-Sx

Datasheet

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Peak Gain

Avg. Gain

YZ-plane

-1.6

-4.7

HARDWARE INTEGRATION SUGGESTIONS

6.1. Circuit

The BT900-series module is easy to integrate and requires few external components on your board aside from

what is required for development and in the end application.

Checklist (for schematic):

▪ VCC

External power source within the operating range, rise time, and noise/ripple specification of BT900. Add

decoupling capacitors for filtering the external source. The power-on reset circuitry within BT900 series

module incorporates brown-out detector, which simplifies the power supply design. Upon application of

power, the internal power-on reset ensures that the module starts correctly. You may add a bulk capacitor

(if required) to smooth out any noise that may be present on the VCC supply due to BT900 activity.

▪ Decide if BT900 is to be powered by 3.3V or 1.8V external Power Supply

The BT radio chip in the BT900 has two internal regulators, a high voltage (input pin BT_VREG_IN_HV) and a

low voltage (input pin BT_VREG_OUT_HV). ONLY one regulator can be used to power radio chip.

– Method 1: If the BT900 is required to operate from 3.3V, connect the external 3.3V supply (2.8V-3.6V)

to pin 31 BT_VREG_IN_HV, pin 5 (VCC), and pin 43 (BT_VDD_IO). Customer MUST leave pin 32

BT_VREG_OUT_HV UNCONNECTED.

– Method 2: If the BT900 is required to operate from 1.8V, connect the external 1.8V (1.75V-1.95V)

supply to pin 32 BT_VREG_OUT_HV, Pin 5 (VCC), and pin 43 (BT_VDD_IO). Customer MUST leave pin

31 BT_VREG_IN_HV UNCONNECTED.

Note: 1.8V operation is not supported in the current smartBASIC runtime engine FW. You must

operate the BT900 from nominal 3.3V supply (2.8V-3.6V).

▪ Place decoupling capacitor 0.1 uF on pin 43 (BT_VDD_IO) to GND

Value 0.1uF or value suitable to filter the noise present.

▪ VCC Turn on/off in the following order or preferably at the same time

Turning on: VCC (BT_VREG_IN_HV, BT_VDD_IO) > AVCC > AVRH.

Turning off: AVRH > AVCC > VCC (BT_VREG_IN_HV, BT_VDD_IO).

If not using the ADC convertor, connect AVCC and AVREF = VCC.

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

▪ You must connect a 100 K pull-down resistor on BT_#SEL externally to GND

▪ AIN (ADC) and SIO pin IO voltage levels

BT900 SIO voltage levels are at VCC. Ensure that input voltage levels into SIO pins are also at VCC. (if VCC

source is a battery whose voltage will drop). Ensure that the ADC pin maximum input voltage for damage is

not violated.

▪ Filter the external supply that is being connected to BT900 AVCC and AVREF pins.

Filter depends on the noise present on your external supply. See the DVK-BT900-V01 schematic.

▪ UART

Required for loading your smartBASIC application script during development (or for subsequent upgrades).

Add connector to allow UART to be interfaced to PC (via UART–RS232 or UART-USB).

▪ UART_RX and UART_CTS

SIO_0 (alternative function UART_RX) is an input, set with internal pull-up (in FW). The pull-up prevents the

module from going into deep sleep when UART_RX line is idling.

SIO_3 (alternative function UART_CTS) is an input, set with external pull-down. This pull-down ensures that

the default state of the UART_CTS is asserted; this means it can send data out of the UART_TX line (in the

case when UART_CTS is not connected, which we do not recommend).

▪ nAutoRUN pin and operating mode selection

The nAutoRUN pin must be externally held high or low to select between the two BT900 operating modes

at power-up:

– Self-contained Run mode (nAutoRUN pin held at 0V).

– Interactive/development mode (nAutoRUN pin held at VCC).

Make provisions to allow operation in the required mode. Add a jumper to allow nAutoRUN pin to be held

high or low (via 10K resistor) or driven by host GPIO.

▪ I2C

IMPORTANT: Pull-up resistors on both I2C_SCL and I2C_SDA lines are not provided in the BT900 module and

MUST be provided externally to the module as per I2C standard.

▪ SPI

Implement SPI chip select using any unused SIO pin within your smartBASIC application script to control

SPI_CS from the smartBASIC application to allow multi-dropping.

▪ SIO pin direction

For BT900 modules shipped from production with smart BASIC runtime engine firmware, most SIO pins

(with a default function of DIO) are digital inputs (see Table 2). Remember to change the direction SIO pin

(in your smart BASIC application script) if that particular pin is wired to a device that expects to be driven by

the BT900 SIO pin configured as an output. Also, SIO pins that are inputs are set in firmware by default to

have internal pull-up resistor enabled (on SIO_xx pins, not BT_xxxx pins). You may configure this in your

smartBASIC application script.

Note: The internal pull-up takes current from VCC.

▪ SIO_19 pin and VSP Command

SIO_19 pin must be pulled to GND externally to enable VSP (virtual serial Port) Command mode for BLE.

SIO_19 is an input, set with internal pull-up in the firmware. VSP Command mode is used to load

smartBASIC scripts OTA (over the air) from a BLE-enabled host.

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

▪ nRESET pin (active low)

Hardware reset. Wire out to push button or drive by host.

By default, the module is out of reset (internal weak-pull-up, 33k) when power is applied to the VCC pin.

For robustness against external interference, you MUST fit an external pull-up resistor (10K) on nRESET (pin

16) to VCC for the BT900 to be out of reset. nRESET needs to be held low (0V)for greater than 500nS to

reset the module.

6.2. PCB Layout on Host PCB - General

PCB Checklist

▪ You MUST place the BT900-Sx module close to the edge of PCB (mandatory for BT900-SA for on-board chips

antenna to radiate properly).

▪ Use solid GND plane on the inner layer (for best EMC and RF performance).

▪ All module GND pins MUST be connected to host PCB GND.

▪ Place GND vias as close to module GND pads as possible.

▪ Unused PCB area on surface layer can be flooded with copper but place GND vias regularly to connect

copper flood to inner GND plane. If GND, flood copper underside the module then connect with GND vias

to inner GND plane.

▪ Route traces to avoid noise being picked up on VCC supply and AIN (analogue) and SIO (digital) traces.

▪ Do NOT run any track near pin 34 of the BT900-Sx.

▪ Ensure no exposed copper is on the underside of the module (refer to land pattern of BT900 development

board).

6.3. PCB Layout on Host PCB for BT900-SA

6.3.1. Antenna Keep-out on Host PCB

The BT900-SA has an integrated chip antenna and its performance is sensitive to host PCB. It is critical to locate

the BT900-SA on the edge of the host PCB (or corner) to allow the antenna to radiate properly. Refer to guidelines

in section Host PCB Land Pattern and Antenna Keep-out for BT900-SA. Some of those guidelines are repeated

below.

▪ Ensure there is no copper in the antenna keep-out area on any layers of the host PCB. Keep all mounting

hardware and metal clear of the area to allow proper antenna radiation.

▪ For best antenna performance, place the BT900-SA module on the edge of the host PCB, preferably in the

corner with the antenna facing the corner.

▪ The BT900 development board has the BT900-SA module on the edge of the board (not in the corner). The

antenna keep-out area is defined by the BT900 development board which was used for module

development and antenna performance evaluation is shown in Figure 5, where the antenna keep-out area

is ~5.18 mm wide, 31.7 mm long; with PCB dielectric height 0.6 mm sitting under the BT900-SA antenna.

▪ A different host PCB thickness dielectric will have small effect on antenna.

▪ The antenna-keep-out defined in Host PCB Land Pattern and Antenna Keep-out for BT900-SA applies when

the BT900-SA is placed in the corner of the host PCB. When BT900-SA cannot be placed as such, it must be

placed on the edge of the host PCB and the antenna keep out must be observed. An example is shown in

Figure 5.

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Figure 5: Antenna keep-out area (shown in red), corner of the BT900 development board for BT900-SA module.

6.3.2. Antenna keep-out and Proximity to Metal or Plastic

Checklist (for metal/plastic enclosure):

▪ The minimum safe distance for metals without seriously compromising the antenna (tuning) is 40 mm

top/bottom and 30 mm left or right.

▪ Metal in close proximity to the BT900-SA chip monopole antenna (bottom, top, left, right, any direction)

will have degradation on the antenna performance. The amount of degradation is system-dependent; some

testing will be required in your host application.

▪ The presence of metal closer than 20 mm starts to significantly degrade performance (S11, gain, radiation

efficiency).

▪ We recommend that you test the range with a product mock-up (or actual prototype) to assess the effects

of enclosure height and the applicable material (metal or plastic).

6.4. External Antenna Integration with BT900-SC

Please refer to the regulatory sections for FCC, IC, CE, and Japan for details of use of BT900-Sx with external

antennas in each regulatory region.

The BT900 family has been designed to operate with the external antennas listed below (with a maximum gain of

2.0 dBi). The required antenna impedance is 50 ohms. See Table 17.

External antennas improve radiation efficiency.

Table 17: External antennas for the BT900

External Antenna PN

Mfg.

Type

Gain (dBi)

Connector Type

BT900 PN

S181FL-L-RMM-2450S

Nearson

Dipole

2.0

uFL Note 1

BT900-SC

MAF94045

Laird

PCB Dipole

2.0

uFL Note 1

BT900-SC

MAF94017

Laird

Dipole

2.0

SMA

BT900-SC

MAF94019

Laird

Dipole

1.5

uFL

BT900-SC

Antenna Keepout

BT900-SA module

Notes:

▪ BT900 module placed on edge of host PCB.

▪ Copper cut-away on all layers in the Antenna Keep-out area under

the BT900 on the host PCB.

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

MECHANICAL DETAILS

7.1. BT900 Mechanical Details

Figure 6: BT900 mechanical drawings

Development Kit Schematics can be found in the documentation tab of the BT900 product page:

http://www.lairdtech.com/products/bt900-series/

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

7.2. Host PCB Land Pattern and Antenna Keep-out for BT900-SA

Figure 7: Host PCB - top view

Dimensions in mm.

Host PCB Land Pattern and Antenna Keep-out Notes:

Note 1

Ensure there is no copper in the antenna Keep Out area on any layers of the host PCB. Also, keep all mounting

hardware or any metal clear (Refer to 6.3.2) of the area to reduce effects of proximity detuning the antenna

and to help antenna radiate properly.

Note 2

For BT900-SA (has on-board chip antenna) best antenna performance, the module must be placed on the edge

of the host PCB and preferably in the corner with the antenna facing the corner (above the Keep Out Area). If

the BT900-SA is not placed in the corner but on edge of the host PCB, the antenna Keep Out Area is extended

(see Note 3).

Note 3

If the BT900 development board has the BT900-SA placed on the edge of the PCB board (and not in corner),

the antenna Keep Out Area is extended down to the corner of the development board (See PCB Layout on Host

PCB for BT900-SA). This was used for module development and antenna performance evaluation.

Note 4

Ensure that there is no exposed copper under the module on the host PCB.

Note 5

The user may modify the PCB land pattern dimensions based on their experience and/or process capability.

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

APPLICATION NOTE FOR SURFACE MOUNT MODULES

8.1. Introduction

Laird‘s surface mount modules are designed to conform to all major manufacturing guidelines. This application

note is intended to provide additional guidance beyond the information that is presented in the User Guide. This

application note is considered a living document and is updated as new information is presented.

The modules are designed to meet the needs of a number of commercial and industrial applications. They are

easy to manufacture and conform to current automated manufacturing processes.

8.2. Shipping

8.2.1. Tray Package

Modules are shipped in ESD (Electrostatic Discharge)

safe trays that can be loaded into most manufacturers

pick and place machines.

Figure 8: BT900 Shipping Tray Details

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

8.2.2. Tape and Reel Package Information

Note: Ordering information for Tape and Reel packaging is an addition of T/R to the end of the full module

part number. For example, BT900-SC-0x becomes BT900-SC-0x-T/R.

Figure 9: Reel specifications

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Figure 10: Tape specifications

BT900-Sx

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

There are 600 BT900 modules taped in a reel (and packaged in a pizza box) and four boxes per carton (2400

modules per carton). Reel, boxes, and carton are labeled with the appropriate labels. See following images (Figures

11-18).

Figure 11: Reel with taped modules

Figure 12: Filled reel

Figure 13: Labeled reel

Figure 14: Reel packaged in pizza box

Figure 15: ESD label

Figure 16: Carton

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Figure 17: Carton label

8.3. Reflow Parameters

Prior to any reflow, it is important to ensure the modules were packaged to prevent moisture absorption. New

packages contain desiccate (to absorb moisture) and a humidity indicator card to display the level maintained

during storage and shipment. If directed to bake units on the card, see Table 18 and follow instructions specified

by IPC/JEDEC J-STD-033. A copy of this standard is available from the JEDEC website:

http://www.jedec.org/sites/default/files/docs/jstd033b01.pdf

Note: The shipping tray cannot be heated above 65°C. If baking is required at the higher temperatures

displayed in in Table 18, the modules must be removed from the shipping tray.

Any modules not manufactured before exceeding their floor life should be re-packaged with fresh desiccate and

a new humidity indicator card. Floor life for MSL (Moisture Sensitivity Level) 3 devices is 168 hours in ambient

environment 30°C/60%RH.

Table 18: Recommended baking times and temperatures

MSL

125°C

Baking Temp.

90°C/≤ 5%RH

Baking Temp.

40°C/ ≤ 5%RH

Baking Temp.

Saturated

30°C/85%

Floor Life Limit

+ 72 hours

@ 30°C/60%

Saturated

30°C/85%

Floor Life Limit

+ 72 hours

@ 30°C/60%

Saturated

@ 30°C/85%

Floor Life Limit

+ 72 hours @

30°C/60%

9 hours

7 hours

33 hours

23 hours

13 days

9 days

Laird surface mount modules are designed to be easily manufactured, including reflow soldering to a PCB.

Ultimately it is the responsibility of the customer to choose the appropriate solder paste and to ensure oven

temperatures during reflow meet the requirements of the solder paste. Laird surface mount modules conform to

J-STD-020D1 standards for reflow temperatures.

Important: During reflow, modules should not be above 260°C and not for more than 30 seconds.

Figure 18: Reel label

Figure 19: Check label

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Figure 16: Recommended Reflow Temperature

Temperatures should not exceed the minimums or maximums presented in Table 19.

Table 19: Recommended Maximum and minimum temperatures

Specification

Value

Unit

Temperature Inc./Dec. Rate (max)

1~3

°C / Sec

Temperature Decrease rate (goal)

2-4

°C / Sec

Soak Temp Increase rate (goal)

.5 - 1

°C / Sec

Flux Soak Period (Min)

Sec

Flux Soak Period (Max)

120

Sec

Flux Soak Temp (Min)

150

°C

Flux Soak Temp (max)

190

°C

Time Above Liquidous (max)

Sec

Time Above Liquidous (min)

Sec

Time In Target Reflow Range (goal)

Sec

Time At Absolute Peak (max)

Sec

Liquidous Temperature (SAC305)

218

°C

Lower Target Reflow Temperature

240

°C

Upper Target Reflow Temperature

250

°C

Absolute Peak Temperature

260

°C

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

FCC AND IC REGULATORY STATEMENTS

Model

US/FCC

CANADA/IC

BT900-SA

SQGBT900

BT900-SC

3147A-BT900

The BT900-SA and BT900-SC hold full modular approvals. The OEM must follow the regulatory guidelines and

warnings listed below to inherit the modular approval.

Part #

Form Factor

TX Output

Antenna

BT900-SA-0X

Surface Mount

8 dBm

Ceramic

BT900-SC-0X

Surface Mount

8 dBm

u.FL

*Last two slots "0X" in Part # are used for production firmware release changes. Can be values 01-99, aa-zz

The BT900 family has been designed to operate with the antennas listed below with a maximum gain of 2.0 dBi.

The required antenna impedance is 50 ohms.

Item

Part Number

Mfg.

Type

Gain (dBi)

Model

AT3216-B2R7HAA

ACX

Ceramic

0.5

BT900-SA

S181FL-L-RMM-2450S

Nearson

Dipole

2.0

BT900-SC

MAF94045

Laird

PCB Dipole

2.0

BT900-SC

MAF94017

Laird

Dipole

2.0

BT900-SC

MAF94019

Laird

Dipole

1.5

BT900-SC

Note: The OEM is free to choose another vendor’s antenna of like type and equal or lesser gain as an

antenna appearing in the table and still maintain compliance. Reference FCC Part 15.204(c)(4) for

further information on this topic.

To reduce potential radio interference to other users, the antenna type and gain should be chosen so

that the equivalent isotropic radiated power (EIRP) is not more than that permitted for successful

communication.

9.1. Power Exposure Information

Federal Communication Commission (FCC) Radiation Exposure Statement:

This EUT is in compliance with SAR for general population/uncontrolled exposure limits in ANSI/IEEE C95.1-1999

and had been tested in accordance with the measurement methods and procedures specified in OET Bulletin 65

Supplement C.

This transceiver must not be co-located or operating in conjunction with any other antenna, transmitter, or

external amplifiers. Further testing / evaluation of the end product will be required if the OEM’s device violates

any of these requirements.

The BT900 is fully approved for mobile and portable applications.

BT900-Sx

Datasheet

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www.lairdtech.com/bluetooth

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Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

9.2. OEM Responsibilities

WARNING: The OEM must ensure that FCC labelling requirements are met. This includes a clearly visible label

on the outside of the OEM enclosure specifying the appropriate Laird Technology FCC identifier for

this product.

Contains FCC ID: SQGBT900 IC: 3147A-BT900

If the size of the end product is larger than 8x10cm, then the following FCC part 15.19 statement has to also be

available on visible on outside of device:

The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following

two conditions: (1) This device may not cause harmful interference, and (2) This device must accept

any interference received, including interference that may cause undesired operation

Label and text information should be in a size of type large enough to be readily legible, consistent with the

dimensions of the equipment and the label. However, the type size for the text is not required to be larger than

eight point.

CAUTION: The OEM should have their device which incorporates the BT900 tested by a qualified test house

to verify compliance with FCC Part 15 Subpart B limits for unintentional radiators.

CAUTION: Any changes or modifications not expressly approved by Laird could void the user’s authority to

operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant

to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful

interference in a residential installation. This equipment generates, uses, and can radiate radio

frequency energy and, if not installed and used in accordance with the instructions, may cause harmful

interference to radio communications. However, there is no guarantee that interference will not occur

in a particular installation. If this equipment does not cause harmful interference to radio or television

reception, which can be determined by turning the equipment off and on, the user is encouraged to

correct the interference by one or more of the following measures:

▪ Re-orient or relocate the receiving antenna

▪ Increase the separation between the equipment and the receiver

▪ Connect the equipment to an outlet on a circuit that is different from that to which the receiver is

connected.

▪ Consult the dealer or an experienced radio/TV technician for help.

FCC Warning:

“THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES AND INDUSTRY CANADA LICENSE-EXEMPT RSS

STANDARD(S). OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE

HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING

INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Industry Canada (IC) Warning:

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following

two conditions: (1) this device may not cause interference, and (2) this device must accept any interference,

including interference that may cause undesired operation of the device.

French equivalent is:

Le présent appareil est conforme aux CNR d'Industrie Canada applicable aux appareils radio exempts de licence.

L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et

(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est

susceptible d'en compromettre le fonctionnement.

IC Radiation Exposure Statement

This EUT is compliance with SAR for general population/uncontrolled exposure limits in IC RSS-102 and had been

tested in accordance with the measurement methods and procedures specified in IEEE 1528.

REMARQUE IMPORTANTE

Déclaration IC d'exposition aux radiations

Ce EUT est conforme avec SAR pour la population générale / limites d'exposition non contrôlée à IC RSS-102 et a

été testé en conformité avec les méthodes de mesure et procédures spécifiées dans la norme IEEE 1528.

Modular Approval

OEM integrator is still responsible for testing their end product for any additional compliance requirements

required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.).

Approbation modulaire

OEM intégrateur est toujours responsable de tester leur produit final pour les exigences de conformité

supplémentaires nécessaires à ce module installé (par exemple, les émissions de périphériques numériques, les

exigences de périphériques PC, etc.)

IMPORTANT NOTE:

In the event that these conditions cannot be met (for example certain laptop configurations or co-location with

another transmitter), then the Canada authorization is no longer considered valid and the IC ID cannot be used

on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end

product (including the transmitter) and obtaining a separate Canada authorization.

NOTE IMPORTANTE:

Dans le cas où ces conditions ne peuvent être satisfaites (par exemple pour certaines configurations

d'ordinateur portable ou de certaines co-localisation avec un autre émetteur), l'autorisation du Canada n'est

plus considéré comme valide et l'ID IC ne peut pas être utilisé sur le produit final. Dans ces circonstances,

l'intégrateur OEM sera chargé de réévaluer le produit final (y compris l'émetteur) et l'obtention d'une

autorisation distincte au Canada.

Le produit final doit être étiqueté dans un endroit visible avec l'inscription suivante: " BT900-SA and BT900-SC

Contient des IC: TBC".

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

JAPAN (MIC) REGULATORY

The BT900 is approved for use in the Japanese market. The part numbers listed below hold WW type certification.

Refer to ARIB-STD-T66 for further guidance on OEM’s responsibilities.

Model

Certificate Number

Antenna

BT900-SA

142150156/AA/00

Ceramic

BT900-SC

142150157/AA/00

uFL

10.1. Antenna Information

The BT900 was tested with antennas listed below. The OEM can choose a different manufacturers antenna but

must make sure it is of same type and that the gain is lesser than or equal to the antenna that is approved for use.

Item

Part Number

Mfg.

Type

Gain (dBi)

Model

AT3216-B2R7HAA

ACX

Ceramic

0.5

BT900-SA

S181FL-L-RMM-2450S

Nearson

Dipole

2.0

BT900-SC

MAF94045

Laird

PCB Dipole

2.0

BT900-SC

MAF94017

Laird

Dipole

2.0

BT900-SC

MAF94019

Laird

Dipole

1.5

BT900-SC

CE REGULATORY

The BT900-SA / BT900-SC have been tested for compliance with relevant standards for the EU market. The BT900-

SC module was tested with a 2.21 dBi antenna. The OEM can operate the BT900-SC module with any other type

of antenna but must ensure that the gain does not exceed 2.21 dBi to maintain the Laird approval.

The OEM should consult with a qualified test house before entering their device into an EU member country to

make sure all regulatory requirements have been met for their complete device.

Table 20: Reference standards used for presumption of conformity

provides a full list of the standards to which the modules were tested. Test reports are available from the

website’s product page.

11.1. Antenna Information

The antennas listed below were tested for use with the BT900. For CE mark countries, the OEM is free to use any

manufacturer’s antenna and type of antenna as long as the gain is less than or equal to the highest gain approved

for use (2.21dBi) Contact a Laird representative for more information regarding adding antennas.

Item

Part Number

Mfg.

Type

Gain (dBi)

Model

AT3216-B2R7HAA

ACX

Ceramic

0.5

BT900-SA

S181FL-L-RMM-2450S

Nearson

Dipole

2.0

BT900-SC

MAF94045

Laird

PCB Dipole

2.0

BT900-SC

MAF94017

Laird

Dipole

2.0

BT900-SC

MAF94019

Laird

Dipole

1.5

BT900-SC

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

EU DECLARATIONS OF CONFORMITY

12.1. BT900-SA/BT900-SC

Manufacturer

Laird

Products

BT900-SA, BT900-SC

Product Description

2.4 GHz Bluetooth/Bluetooth Low Energy (BLE) module

EU Directives

2014/53/EU – Radio Equipment Directive (RED)

Table 20: Reference standards used for presumption of conformity

Article Number

Requirement

Reference standard(s)

3.1a

Low voltage equipment safety

EN 60950-

1:2006+A11:2009+A1:2010+A12:2011+A2:2013

RF Exposure

EN 62311:2008

3.1b

Protection requirements with respect to

electromagnetic compatibility

EN 301 489-1 v2.2.0 (2017-03)

EN 301 489-17 v3.2.0 (2017-03)

3.2

Means of the efficient use of the radio

frequency spectrum (ERM)

EN 300 328 v2.1.1 (2016-11)

Declaration:

We, Laird, declare under our sole responsibility that the essential radio test suites have been carried out and that

the above product to which this declaration relates is in conformity with all the applicable essential requirements

of Article 3 of the EU Directive 2014/53/EU, when used for its intended purpose.

Place of Issue:

Laird

W66N220 Commerce Court, Cedarburg, WI 53012 USA

tel: +1-262-375-4400 fax: +1-262-364-2649

Date of Issue:

02 May 2017

Name of Authorized Person:

Thomas T Smith, Director of EMC Compliance

Signature of Authorized Person:

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

ORDERING INFORMATION

Part Number

Description

BT900-SA-0x

Intelligent BTv4.0 Dual Mode Module featuring smart BASIC – integrated antenna

BT900-SC-0x

Intelligent BTv4.0 Dual Mode Module featuring smart BASIC – uFL connector

DVK – BT900-SA-0x

Development board with BT900-SA module soldered in place

DVK – BT900-SC-0x

Development board with BT900-SC module soldered in place

Note: Ordering information for Tape and Reel packaging is an addition of T/R to the end of the full module

part number. For example, BT900-SC-0x becomes BT900-SC-0x-T/R.

BLUETOOTH SIG QUALIFICATION

The BT900 module is listed on the Bluetooth SIG website as a qualified Controller Subsystem.

Laird’s Controller Subsystem is then combined with the StoneStreet One Bluetopia ost and Profile subsystems to

create the complete Bluetooth SIG qualification, in the steps listed in this application note.

Design Name

Owner

Declaration ID

QD ID

Link to listing on the SIG website

BT900

Laird

D023116

58778

https://www.bluetooth.org/tpg/QLI_viewQDL.cfm?qid=23116

Bluetopia Host

StoneStreet

One

B019355

37180

https://www.bluetooth.org/tpg/QLI_viewQDL.cfm?qid=19355

BlueTopia

Profile

StoneStreet

One

B020402

42849

https://www.bluetooth.org/tpg/QLI_viewQDL.cfm?qid=20402

It is a mandatory requirement of the Bluetooth Special Interest Group (SIG) that every product implementing

Bluetooth technology has a Declaration ID. Every Bluetooth design is required to go through the qualification

process, even when referencing a Bluetooth Design that already has its own Declaration ID. The Qualification

Process requires each company to register as a member of the Bluetooth SIG – www.bluetooth.org

The following is a link to the Bluetooth Registration page: https://www.bluetooth.org/login/register/

For each Bluetooth Design it is necessary to purchase a Declaration ID. This can be done before starting the new

qualification, either through invoicing or credit card payment. The fees for the Declaration ID will depend on your

membership status, please refer to the following webpage:

https://www.bluetooth.org/en-us/test-qualification/qualification-overview/fees

For a detailed procedure of how to obtain a new Declaration ID for your design, please refer to the following SIG

document:

https://www.bluetooth.org/DocMan/handlers/DownloadDoc.ashx?doc_id=283698&vId=317486

BT900-Sx

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/bluetooth

Americas: +1-800-492-2320

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

14.1. Qualification Steps When Using a Laird Controller Subsystem Design

To qualify your product when referencing a Laird Controller Subsystem design, follow these steps:

1. To start a listing, go to: https://www.bluetooth.org/tpg/QLI_SDoc.cfm

Note: A user name and password are required to access this site.

2. In step 1, select the option, New Listing and Reference a Qualified Design.

3. Enter 58778 in the Controller Subsystem table entry.

4. Add you complimentary Host Subsystem and optional Profile Subsystem to complete the design

37180 for Stonestreet One Bluetopia Host Subsystem 4.0 and,

42849 for Stonestreet One Bluetopia Profile Subsystem

5. Select your pre-paid Declaration ID from the drop down menu or go to the Purchase Declaration ID page.

Note: Unless the Declaration ID is pre-paid or purchased with a credit card, you cannot proceed until

the SIG invoice is paid.

6. Once all the relevant sections of step 1 are finished, complete steps 2, 3, and 4 as described in the help

document accessible from the site.

Your new design will be listed on the SIG website and you can print your Certificate and SDoC.

For further information please refer to the following training material:

https://www.bluetooth.org/en-us/test-qualification/qualification-overview/listing-process-updates

ADDITIONAL ASSISTANCE

Please contact your local sales representative or our support team for further assistance:

Laird Technologies Connectivity Products Business Unit

Support Centre: http://ews-support.lairdtech.com

Email: wireless.support@lairdtech.com

Phone: Americas: +1-800-492-2320 Option 2

Europe: +44-1628-858-940

Hong Kong: +852 2923 0610

Web: http://www.lairdtech.com/bluetooth

specifications are subject to change without notice. Responsibility for the use and application of Laird materials or products rests with the end user since

Laird and its agents cannot be aware of all potential uses. Laird makes no warranties as to non-infringement nor as to the fitness, merchantability, or

sustainability of any Laird materials or products for any specific or general uses. Laird, Laird Technologies, Inc., or any of its affiliates or agents shall not

be liable for incidental or consequential damages of any kind. All Laird products are sold pursuant to the Laird Terms and Conditions of Sale in effect from

time to time, a copy of which will be furnished upon request. When used as a tradename herein, Laird means Laird PLC or one or more subsidiaries of

Laird PLC. Laird™, Laird Technologies™, corresponding logos, and other marks are trademarks or registered trademarks of Laird. Other marks may be the

property of third parties. Nothing herein provides a license under any Laird or any third party intellectual property right.