Freescale Semiconductor Inc. TWRWIFIG1011MIUM
TWR-WIFI-GS1500M
User’s Manual
Rev. 1.0
TWRWIFIG1500MUM TWR-WIFI-G1500M User’s Manual Page 2 of 8
Contents
1 Overview ...................................................................................................................................................... 3
2 Reference Documents .............................................................................................................................. 4
3 Hardware Features ................................................................................................................................... 4
3.1 GainSpan GS1500M Module ........................................................................................................................................... 4
3.2 System Power ....................................................................................................................................................................... 4
3.3 Special I/O, access headers, etc. .................................................................................................................................... 5
3.4 LED, Switches and Buttons ............................................................................................................................................. 5
3.5 Elevator Connections ........................................................................................................................................................ 5
4 Jumper Table .............................................................................................................................................. 8
Revision History
Revision
Date
Changes
1.0
Sept 2012
Initial Release
TWRWIFIG1500MUM TWR-WIFI-G1500M User’s Manual Page 3 of 8
1 Overview
The GainSpan Wi-Fi Tower Module (TWR-WIFI-GS1500M) is a low-cost evaluation, demonstration and
development board that features an 802.11b/g/n (GS1500M) solution from GainSpan. The following
list summarizes the features of the modules:
GainSpan Wi-Fi module
o GS1500M is compliant to 802.11b/g/n and operates with standard 802.11 b/g/n access
points at speeds up to 72 Mbps
Supports standby, deep-sleep, and 802.11 PS-POLL for low power states
Supports Infrastructure, Adhoc, Limited AP and Wi-Fi Direct modes
o UART and SPI interfaces
Clock rates up to 1.4 MHz in SPI Slave Mode
Up to 921.6 kbps baud rate on UART
o Full Wi-Fi stack including WPS and optional networking stack and services
o 802.11i Security
WEP, WPA, WPA2-PSK, Enterprise
o Embedded Web Server for Provisioning
o Certified RF Module: FCC/IC, ETSI, RoHS, Compliant with JAPAN regulatory
A block diagram for the GainSpan module Based Tower is shown in the figure below.
Figure 1. TWR-WIFI–GS1500M Block Diagram
Freescale
MCU/MPU
TWR BRD
(Master)
GainSpan
Low Power
Wi-Fi
Module
(SPI Slave)
HOST_WAKEUP
GPIO28
3.3V
RS232
Antenna
Debug/Programming Port
FLASH
SSPI
SPI
MSPI
RESET
UART
UART
SPI
TWRWIFIG1500MUM TWR-WIFI-G1500M User’s Manual Page 4 of 8
2 Reference Documents
The documents listed below should be referenced for more information on the Freescale Tower
system and the TWR-WIFI-G1500M. Refer to http://www.freesale.com/tower for the latest revision of
all Tower documentation.
TWR-WIFI- GS1500M Quick Start Guide
TWR-WIFI- GS1500M Lab Tutorial
TWR-WIFI- GS1500MSchematics
GainSpan Serial to Wi-Fi Adapters Guide
For technical documents on the GainSpan Wi-Fi module refer to http://www.gainspan.com
3 Hardware Features
This section provides more details about the features and functionality of the TWR-WIFI Module.
3.1 GainSpan GS1500M Module
GainSpan module is a highly integrated ultra low power Wi-Fi module that contains the following:
Contains media access controller (MAC), baseband processor, on-chip flash memory and SRAM,
and a network processor in a single package.
Built in certified PCB trace antenna or external Antenna and on board regulators, 32 KHz & 44
MHz crystal circuitries.
o The GS1500M has capability of up to 14dBm (typical) output power at the antenna
Module includes a variety of I/O interfaces:
o Two UART with optional hardware flow control support
o Two SPI block with Master or Slave Operation
o I2C with Master or slave operation
o Two low-power 10-bit ADC capable of running at up to 32 Ksamples/Sec.,
o GPIO’s, and LED Drivers/GPIO with 20mA capabilities, JTAG
The Module carries on-board single supply monitor for under voltage supply and on-board 1.8V
regulator with enable/disable capabilities for power critical applications. For additional details refer to
the GS1500M data sheet available from GainSpan. The module connects to the Freescale Tower
platform using either UART or the SPI interface. The module firmware supports basic AT command set
and has the network stack built in so the driver is bare metal driver for the K60 MCU.
3.2 System Power
The module is powered by 3.3V from the Primary Elevator connector.
TWRWIFIG1500MUM TWR-WIFI-G1500M User’s Manual Page 5 of 8
3.3 Special I/O, access headers, etc.
The firmware on the GainSpan module runs directly from the on-board flash on the module. To allow
for updating of the program on the flash, the tower module incorporates a UART serial interface for
programming purposes. This interface is brought out to a standard RS232 DB9 connector via a RS232
transceiver. In addition to the serial interface, a switch is also provided on the board to put the module
in programming mode.
3.4 LED, Switches and Buttons
The tower modules contain various LEDs, switches and Buttons that perform different functions or
provide status information. The table below provides a brief description of the each of them.
Table 1. TWR-WIFI-GS1500M Switch/LED/Button Table
Item
Type
Label
Description
SW2
Button
Reset
Resets the module
SW3
Button
Alarm
Alarm input to wake module up from deepsleep or
standby power save state
SW4
Button
WPS
Not used
SW5
Button
Factory Restore
Not used
D1, D4
LED
LED
Power Indication
D2, D3
LED
LED
SW controlled using AT command from Module
3.5 Elevator Connections
The tower module features two expansion card-edge connectors that interface to Elevator boards in a
Tower system: the Primary and Secondary Elevator connectors. The Primary Elevator connector,
comprised of sides A and B, is utilized by the tower module, while the Secondary Elevator connector
TWRWIFIG1500MUM TWR-WIFI-G1500M User’s Manual Page 6 of 8
only makes connections to ground (GND). Table 2 provides the pinout for the Primary Elevator
Connector. An “X” in the “Used” column indicates that there is a connection from the TWR-WIFI-
GS1500M to that pin on the Elevator connector. An “X” in the “Jmp” column indicates that a jumper is
available that can configure or isolate the connection from the Elevator connector.
Table 2. TWR-WIFI-GS1500M Primary Elevator Connector Pin-out
TWR-WIFI-G1011MI/GS1500M Primary Connector
Side B
Side A
Pin #
Name
Usage
Used
Jmp
Pin #
Name
Usage
Used
Jmp
B1
5V
A1
5V
B2
GND
Ground
X
A2
GND
Ground
X
B3
3.3V
3.3V Power
X
A3
3.3V
3.3V Power
X
B4
ELE_PS_SENSE
A4
3.3V
3.3V Power
X
B5
GND
Ground
X
A5
GND
Ground
X
B6
GND
Ground
X
A6
GND
Ground
X
B7
SPI1_CLK / SDHC1_CLK
MSPI_CLK
A7
SCL0
B8
SPI1_CS1 / SDHC1_CS1
MSPI_CSx
A8
SDA0
B9
SPI1_CS0 / SDHC1_CS0
MSPI_CSx
A9
GPIO9 / CTS1
EXT_RESET
X
X
B10
SPI1_MOSI / SDHC1_CMD
MSPI_DIN
A10
GPIO8 / SDHC_D2
B11
SPI1_MISO / SDHC1_D0
MSPI_DOUT
A11
GPIO7 / SD_WP_DET
Mechanical Key
B12
ETH_COL
A12
ETH_CRS
B13
ETH_RXER
A13
ETH_MDC
B14
ETH_TXCLK
A14
ETH_MDIO
B15
ETH_TXEN
A15
ETH_RXCLK
B16
ETH_TXER
A16
ETH_RXDV
B17
ETH_TXD3
A17
ETH_RXD3
B18
ETH_TXD2
A18
ETH_RXD2
B19
ETH_TXD1
A19
ETH_RXD1
B20
ETH_TXD0
A20
ETH_RXD0
ipB21
GPIO1
GPIO_RST
X
X
A21
SSI_MCLK
B22
GPIO2
GPIO29
A22
SSI_BCLK
B23
GPIO3
GPIO19
A23
SSI_FS
B24
CLKIN0
A24
SSI_RXD
B25
CLKOUT1
A25
SSI_TXD
B26
GND
Ground
X
A26
GND
Ground
X
B27
AN7
A27
AN3
B28
AN6
A28
AN2
B29
AN5
A29
AN1
B30
AN4
A30
AN0
B31
GND
Ground
X
A31
GND
Ground
X
B32
DAC1
A32
DAC0
B33
TMR3
A33
TMR1
B34
TMR2
A34
TMR0
B35
GPIO4
DC_DC_CNTL
A35
GPIO6
ALARM2
B36
3.3V
3.3V Power
X
A36
3.3V
3.3V Power
X
B37
PWM7
A37
PWM3
TWRWIFIG1500MUM TWR-WIFI-G1500M User’s Manual Page 7 of 8
B38
PWM6
A38
PWM2
B39
PWM5
A39
PWM1
B40
PWM4
A40
PWM0
B41
CANRX
A41
RXD0
UART0_TX
X
B42
CANTX
A42
TXD0
TWR_UART0
X
X
B43
1WIRE
A43
RXD1
B44
SPI0_MISO
SSPI_DOUT
X
A44
TXD1
B45
SPI0_MOSI
SSPI_DIN
X
A45
GPIO
B46
SPI0_CS0
SSPI_CS
X
X
A46
GPIO
B47
SPI0_CS1
SSPI_CS
X
X
A47
GPIO
B48
SPI0_CLK
SSPI_CLK
X
A48
GPIO
B49
GND
Ground
X
A49
GND
Ground
X
B50
SCL1
I2C_CLK
A50
GPIO
B51
SDA1
I2C_DATA
A51
GPIO
B52
GPIO5
ALARM1
X
A52
GPIO
B53
USB_DP_PDOWN
A53
GPIO
B54
USB_DM_PDOWN
A54
USB_DM
B55
IRQ_H
A55
USB_DP
B56
IRQ_G
GPIO28
X
X
A56
USB_ID
B57
IRQ_F
A57
USB_VBUS
B58
IRQ_E
GPIO28
X
X
A58
TMR7
B59
IRQ_D
A59
TMR6
B60
IRQ_C
GPIO28
X
X
A60
TMR5
B61
IRQ_B
A61
TMR4
B62
IRQ_A
GPIO28
X
X
A62
RSTIN_b
B63
FB_ALE/FB_CS1_b
A63
RSTOUT_b
EXT_RESET
X
X
B64
FB_CS0_b
A64
CLKOUT0
B65
GND
Ground
X
A65
GND
Ground
X
B66
FB_AD15
A66
FB_AD14
B67
FB_AD16
A67
FB_AD13
B68
FB_AD17
A68
FB_AD12
B69
FB_AD18
A69
FB_AD11
B70
FB_AD19
A70
FB_AD10
B71
FB_R/W_b
A71
FB_AD9
B72
FB_OE_b
A72
FB_AD8
B73
FB_D7
A73
FB_AD7
B74
FB_D6
A74
FB_AD6
B75
FB_D5
A75
FB_AD5
B76
FB_D4
A76
FB_AD4
B77
FB_D3
A77
FB_AD3
B78
FB_D2
A78
FB_AD2
B79
FB_D1
A79
FB_AD1
B80
FB_D0
A80
FB_AD0
B81
GND
Ground
X
A81
GND
Ground
X
B82
3.3V
3.3V Power
X
A82
3.3V
3.3V Power
X
TWRWIFIG1500MUM TWR-WIFI-G1500M User’s Manual Page 8 of 8
4 Jumper Table
There are several jumpers provided for isolation, configuration, and feature selection. Refer to the
following table for details. The default installed jumper settings are highlighted below.
Table 3. TWR-WIFI-GS1500M Jumper Table
Jumper
Option
Setting
Description
SW1
Power Supply
Input
ELEV PWR
Power from Tower System 3.3V
DC PWR
Power from DC power jack (J2)
SW6
Mode Selection
RUN
GS1500M in standard "run" mode
PRGM
GS1500M in program mode
J1
Interrupt
Selection
1-2
Connect GS1500M interrupt to Tower IRQ_G (B56)
3-4
Connect GS1500M interrupt to Tower IRQ_E (B58)
5-6
Connect GS1500M interrupt to Tower IRQ_C (B60)
7-8
Connect GS1500M interrupt to Tower IRQ_A (B62)
J3
SPI/UART
Selection1
1-2
Select SPI as serial interface
2-3
Select UART as serial interface
J4
GS1500M Reset
Selection
1-2
Connect GS1500M Reset to Tower GPIO9 (A9)
2-3
No connection
J5
1-2
Connect GS1500M Reset to Tower RSTOUT (A63)
2-3
Connect GS1500M Reset to Tower GPIO1 (B21)
J7
Slave SPI Port CS
Selection
1-2
Connect Tower SPI0_CS0 to slave SPI CS on GS1500M
2-3
Connect Tower SPI0_CS1 to slave SPI CS on GS1500M
J8
UART Routing
Selection
1-2
Connect GS1500M UART0 to on-board RS232/DB9
2-3
Connect GS1500M UART0 to Tower System
J9
Master SPI Port
CS Selection
1-2
Connect Tower SPI1_CS1 to master SPI CS on GS1500M
2-3
Connect Tower SPI1_CS0 to master SPI CS on GS1500M
J11
Power Isolation
and Current
Measurement
ON
Connect GS1500M power supplies to the 3.3V supply
source
OFF
Isolate GS1500M from power supplies. J11 can be used to
measure the energy consumption of the VBAT, VDDIO, and
EN_1V8 supplies to the GS1500M.
J14
RS232
Transceiver
Force-off
ON
RS232 transceiver operates in normal mode
OFF
RS232 transceiver forced off
J15
UART CTS
Isolation
ON
Connect UART0_CTS from GS1500M to RS232 transceiver
OFF
Disconnect UART0_CTS from RS232 transceiver
Note: 1. This jumper is not applicable with Serial to Wi-Fi firmware. It is applicable with IP-to-Wi-Fi
firmware.