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Introduction
The development kit for the Atmel® ATA664251 IC consists of the PC interface board
(ATAB0004A-V2.0) and the Atmel ATA664251 application board (ATAB664251A-V1.0)
attached together as one unit. The kit provides users with a quick start guide for prototyping
and testing new LIN designs with the Atmel ATA664251 IC.
Figure 1. Atmel ATAK43001-V1 Development Kit
The Atmel ATA664251 is a system-in-package (SiP) product, which is especially well
suited for complete LIN-bus node applications. It is designed specifically for LIN switch
applications and includes nearly the complete LIN node. It consists of two ICs in one pack-
age supporting highly integrated solutions for in-vehicle LIN networks. The first chip is the
ATA664151 LIN system basis chip (SBC), which has an integrated LIN transceiver, a 5V
regulator (80mA), a window watchdog, an 8-channel high voltage switch interface with
high-voltage current sources and a 16-bit SPI for configuration and diagnosis.
The second chip is an Atmel automotive microcontroller from the AVR 8-bit microcontroller
series featuring advanced RISC architecture, the Atmel ATtiny167 with 16 Kbytes of Flash
memory.
All the LIN SBC pins as well as all the AVR microcontroller pins are bonded out to provide
customers with the same flexibility for their applications they have when using discrete
parts.
APPLICATION NOTE
ATAK43001-V1 Development Kit for the
ATA664251 Atmel IC
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The Atmel® LIN SBC ATA664251 has the following features:
SBC:
●LIN master and slave operation possible
●Up to 40V supply voltage
●Operating voltage VS = 5V to 27V
●8-channel HV switch interface with HV current sources
●Internal voltage divider for VBattery sensing (±2%)
●16-bit serial interface (daisy-chain-capable) for configuration and diagnosis
●Typically 8µA supply current during sleep mode
●Typically 35µA supply current in active low-power mode
●5V ±2% linear low-drop voltage regulator, up to 80mA current capability
●VCC undervoltage detection (5ms reset time) and watchdog reset logical combined at NRES open drain output
●LIN high-speed mode for transmission rates up to 200kBit/s
●Watchdog timer adjustable via external resistor
●Negative trigger input for watchdog
●LIN physical layer complies with LIN 2.1 specification and SAE J2602-2
●Wake-up capability via LIN bus and CL15
●Bus pin is overtemperature and short-circuit protected versus GND and battery
●Advanced EMC and ESD performance
●System-level ESD performance conforming with OEM “Hardware Requirements for LIN in Automotive Applications
Rev. 1.2”
●3x PWM inputs for direct control of the switch interface sources
AVR microcontroller:
●High-performance, low-power AVR® 8-bit microcontroller
●Advanced RISC architecture
●123 powerful instructions - in most cases single clock cycle execution
●32 × 8 general purpose working registers
●Fully static operation
●Non-volatile program and data memories
●16 Kbytes of in-system programmable (ISP) program memory flash
●Endurance: 10,000 write/erase cycles
●512 bytes in-system programmable EEPROM
●Endurance: 100,000 write/erase cycles
●512 bytes internal SRAM
●Programming lock for self-programming Flash program and EEPROM data security
●Peripheral features
●LIN 2.1 and LIN 1.3 controller or 8-bit UART
●8-bit asynchronous timer/counter0
●10-bit clock prescaler
●One output compare or 8-bit PWM channel
●16-bit synchronous timer/counter1
●10-bit clock prescaler
●External event counter
●Two output compare units or 16-bit PWM channels each driving up to four output pins
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●Master/slave SPI serial interface
●Universal serial interface (USI) with start condition detector (master/slave SPI, TWI, ...)
●10-bit ADC
●11 single-ended channels
●Eight differential ADC channel pairs with programmable gain (8x or 20x)
●On-chip analog comparator with selectable voltage reference
●100µA ±10% current source (LIN node identification)
●On-chip temperature sensor
●Programmable watchdog timer with separate on-chip oscillator
●Special microcontroller features
●Dynamic clock switching (external/internal RC/watchdog clock) for power control, EMC reduction
●DebugWIRE on-chip debug (OCD) system
●Hardware in-system programmable (ISP) via SPI port
●External and internal interrupt sources
●Interrupt and wake-up on pin change
●Low-power idle, ADC noise reduction, and power-down modes
●Enhanced power-on reset circuit
●Programmable brown-out detection circuit
●Internal calibrated RC oscillator 8MHz
●4MHz to 16MHz and 32kHz crystal/ceramic resonator oscillators
●I/O
●16 programmable I/O lines
●Speed grade
●0MHz to 16MHz at 4.5V to 5.5V (automotive temperature range: –40°C to +125°C)
This document has been developed to provide users with start-up information about the Atmel ATAK43001-V1 development
kit. For more information about the use of the devices themselves, see the appropriate datasheet.
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1. Development Kit Features
The development kit for the Atmel® ATA664251 IC has the following features, starting with the features of the Atmel
ATA664251 (ATAB664251A-V1) board:
●All necessary components to put the Atmel ATA664251 into operation are included to simulate and test the real
application
●LEDs connectable to all HV ports
●1x RGB LED
●8x push-buttons
●8x rotary switches
●Easy access to all pins
●ISP connector for on-chip ISP (in-system programming)
●Easily adaptable watchdog times by replacing a single resistor
●Possibility of selecting between master or slave operation (mounting D2 and R1)
●Push button included for creating a local wake-up after entering sleep mode
●Easily adaptable current level of the current sources by replacing a single resistor
●Ground coulter clip for connecting probes easily when measuring with the oscilloscope
The interface board (Atmel ATAB0004A) has the following features:
●Easy connection to a PC (AT90USB1287 on board)
●USB interface to PC
●SBC functions easily configurable via PC GUI
●ISP connector for in-chip ISP (in-system programming)
●JTAG connector for on-chip debugging
●Buzzer
●On-board RESET button
●On-board boot loader button to force AVR® into DFU mode at reset
●16MHz crystal for system clock
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2. Getting Started
The development kit for the Atmel® ATA664251 is shipped with the default jumper settings and all accessories required for
immediate use.
Figure 2-1. Atmel ATAK43001-V1 Developm ent Kit with Reference Points
The IC mounted on the PC interface board (AT90USB1287) is preprogrammed with firmware which facilitates testing and
gaining familiarity with the basic functions of the kit.
The microcontroller within the Atmel ATA664251 (Atmel ATtiny167) is held in reset via jumper J12 and the SCB is controlled
via the PC interface board and the demo GUI.
First of all the USB drivers and the GUI software have to be installed (please see Section 2.2 “USB Driver Installation” on
page 8 and Section 2.1 “GUI Software Installation” on page 7 for more information). After correctly connecting an external
12V DC power supply (reference point 1) to the power connector and connecting the PC interface board to the PC via the
supplied USB cable, the kit is ready to use.
The Atmel ATA664251 IC starts in active mode, with the VCC voltage regulator, the window watchdog switched on (the latter
depends on the VDIV pin, see Section 5.7 “Watchdog Section” on page 39), the AVR core is in reset (reset pin (pin 2) is
connected by default to GND via jumper J12). The status of all pins is shown in Table 2-1 on page 6.
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Table 2-1. Overview of Pin Status at Power-Up of the Development Kit
Test Point Expected Behavior Additional Information
NTRIG 5V
TXD 5V
RXD 5V
NRES ≈5ms reset pulse with ≈165ms period,
because the watchdog is not triggered
NIRQ 0V
MISO 0V
MOSI 0V
SCK 0V
NCS 5V
PWM1 0V
PWM2 0V
PWM3 0V
VDIV 0V
LIN ≈12V Dependent on the supply voltage
(VBAT-0.7V)
CL15 0V
J16 ≈5.1V If jumper J1 (controller board) is set, this
jumper should be open.
J2 ≈5ms reset pulse with ≈ 165ms period,
because the watchdog is not triggered
J1 ≈5.1V Default setting, otherwise ≈3.3V
Jxx 0V Default setting: connected to GND
VCC (pin 14) 5V Voltage regulator is ON
PA0…7 0V AVR is in reset --> I/Os in tristate
PB0…7 0V AVR is in reset --> I/Os in tristate
CS1…8 0V Switch interface is OFF
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2.1 GUI Software Installation
To install the GUI, execute the setup.exe file and follow the instructions to complete the installation.
Select the directory where you want to install the demo and click “Next.”
Figure 2-2. Selecting the Directory
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After the installation is done, press “Finish.”
Figure 2-3. Completing the Installation
2.2 USB Driver Installation
After connecting the PC interface board to a PC the first time, the required USB drivers must be installed before the kit can
be used.
Be sure to install the GUI first before installing the USB driver (see Section 2.1 “GUI Software Installation” on page 7).
As soon as the PC has detected a new hardware device, the “Hardware Wizard” appears. Select “No, not this time” and then
click “Next.”
Figure 2-4. Selecting “No, not this time ”
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Select “Install from a list or specific location” and then click “Next.”
Figure 2-5. Selecting “Install from a list or specific location (advanced)”
Select “Don’t search. I will choose the driver to install.” and then click “Next.”
Figure 2-6. Selecting “Don’t search. I will choose the driver to install.”
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If more than one driver is found, be sure to select the “Destiny National Instruments” driver and then click “Next.”
Figure 2-7. Selecting the “Destiny National Instruments” Driver
Figure 2-8. Installing the Driver
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After successfully installing the driver, press the “Finish” button.
Figure 2-9. Selecting “Finish”
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2.3 Quick Start User Guide
1. To start working with the kit, execute the Atmel® ATA6641_Demo.exe. This can be done either from the “Start”
menu or from the folder containing the kit files (see Section 2.1 “GUI Software Installation” on page 7). Before
starting the GUI, make sure the correct USB driver (see Section 2.2 “USB Driver Installation” on page 8 for more
information) and GUI software are installed and that the power supply and USB are properly connected. The fol-
lowing window is opened so that the user can set up and test all the features of the SBC.
Figure 2-10. Atmel ATA664251 Demo GUI at Start-up
After starting up the GUI, as standard the SBC is set to low-power mode. This is indicated in Section 5.1 “SBC Sec-
tion” on page 34 (yellow LED - ActiveLP is ON) in the GUI and on the PC interface board (LED - LD2 is ON (reference
point 21)) as well (see Figure 2-12).
2. A quick check to determine everything is working properly can be done by clicking the “Active Mode” button in the
SBC section where all “Bit Buttons” in Section 5.5 “I/O Ports Section” on page 36 are checked (please see
Figure 2-11) and the following LEDs on the ATAB664251A board (please see Figure 2-12) are turned on:
●LD1-3 (indicate that CS1 is set to low-side ON)
●LD7-9 (indicate that CS4 is set to low-side ON)
●LD13-15 (indicate that CS3 is set to low-side ON)
●LD19-33 (indicate that CS4-8 are ON)
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Figure 2-11 . Atmel ATA664251 Demo GUI after “Active Mode” Button Is Pressed
Figure 2-12. Atmel ATAK43001-V1 Kit LEDs in Activ e Mode
In active mode, the watchdog and a valid trigger signal (35ms) are activated. In addition, the LIN interface is enabled
and a default frequency of 10kHz (20kBit/s) is generated on the TXD pin.
In order to have a LIN signal approximating a real LIN network, a master pull-up and a master diode (reference point
4) are populated on the board (see Section 3.6.3 “Configuring the Atmel ATAK43001-V1 Kit as a Master or a Slave
Node” on page 30).
3. It is relatively easy to change the mode of the SBC. Click one of the three mode buttons in Section 5.1 “SBC Sec-
tion” on page 34. The current mode is indicated in the GUI (3x LEDs in Section 5.1 “SBC Section” on page 34) and
on the PC interface board (reference point 21; LEDs - LD2, LD4, LD4) as well. For more information about the dif-
ferent modes, see Section 5.1 “SBC Section” on page 34 or the ATA664251 datasheet.
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Figure 2-13. Mode Change
4. To better understand the features of the high-voltage I/O ports, try changing various settings for the I/O ports by:
●Enabling/disabling a specific CSx port (select/deselect the CSE bit and click the appropriate “Configure CSx”
button)
●Configure CS1…3 as low-side or high-side by selecting/deselecting the CSSSM bit and click the appropriate
“Configure CS1…3” button
●Configure one of the CS1…8 ports to be controlled either by PWM signal or not: Select/deselect the CSC bit
and click the appropriate “Configure CS1…8” button. Make sure the dedicated PWM1…3 signals in the
corresponding section of the GUI have been enabled (for more information, see Section 5. “Atmel ATA664251
Demo GUI Description” on page 33).
●Double/halve the current of the CS1…8 ports by selecting either “x100” or “x50” for the IMUL bit.
Figure 2-14. CSx Port Setting
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5. The VBattery voltage or the voltage on the I/O ports can be easily measured (one at a time) at the VDIV pin. To do
so, select the desired source in the “Voltage Divider” section (at the upper right side of the GUI) that has to be
measured and press the “Continual” button for continuous measurement of the selected source.
Figure 2-15. Selecting the Voltage Measurement Source
6. For testing purposes and to become familiar with the system, it may be helpful to see the behavior when the
watchdog is not triggered correctly. This can be done in two different ways without changing the firmware of the
IC:
●Disable NTRIG frequency (click on the “NTRIG ON/OFF” button)
No trigger signal reaches the watchdog and the watchdog generates a reset directly after the lead time
td(51k) = 155ms has expired.
●Re-program the fuse bit
Changing the CKDIV8 fuse bit to be programmed changes the microcontroller’s internal clock from 16MHz to
2MHz. Because of this the trigger signal generated from the microcontroller does not meet the open window
from the window watchdog and a reset is generated.
In this case the watchdog generates resets (≈ 5ms reset pulse with ≈ 165ms period) on the NRES pin (displayed also
in the GUI in the “Current SBC Status” section).
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3. Hardware Description
3.1 Pin Description - ATAB664251A Board
In the following sections, the external elements required for some of the pins are shown and described. See the relevant
datasheet for more information about this topic.
Note: The Atmel® ATA664251's AVR® is held in reset (J12 connected to GND) and it is not supplied (J16 is open).
3.1.1 Power Supply
In order to get the Atmel ATAB664251A development board running, an external 5V to 27V DC power supply has to be
connected to the power connector. The input circuit is protected against inverse polarity with the protection diode D7,
resulting in a difference of approximately 0.7V between the VBAT supply voltage and the voltage at the VS pin.
In order to avoid false bus messages, undervoltage detection is implemented to disable data transmission via the LIN bus
and the switch interface if VVS falls below VVSth. After switching on VS, the IC starts in active mode (for more information,
please see also Section 4.1 “Active Mode” in the Atmel ATA664251 datasheet) with the VCC voltage regulator and the
window watchdog switched on.
3.1.2 Voltage Regulator (VCC )
The internal 5V voltage regulator is capable of driving loads up to 80mA for supplying the microcontroller and other loads. It
is protected against overloads by means of current limitation and overtemperature shutdown. In addition, the output voltage
is monitored and causes a reset signal at the NRES output pin if it drops below a defined threshold VVCCthun.
A safe operating area (SOA) is defined for the voltage regulator because the power dissipation caused by this block might
exceed the system’s thermal budget (please see the Atmel ATA664251 datasheet for more detailed information).
3.1.3 The Window Watchdog (NTRIG, WD_OSC, and NRES)
The watchdog anticipates a trigger signal from the microcontroller at the NTRIG input (negative edge) within a defined time
window. If no correct trigger signal is received during the open window, a reset signal (active low) is generated at the NRES
output. During silent mode or sleep mode the watchdog is switched off to reduce current consumption.
The timing basis of the watchdog is provided by the internal oscillator, whose time period tOSC can be adjusted via the
external resistor R2 at the WD_OSC pin. All watchdog-specific timings (t1, t2, td, ...) are based on the value of this resistor.
There is a resistor with a value of 51k mounted on the development board by default, resulting in the timing sequence for
the integrated watchdog in Figure 3-1.
Figure 3-1. Watchdog Timing Sequence wi th R2 = 51k
tnres = 4ms
Undervoltage Reset Watchdog Reset
treset = 4ms
ttrig > 200ns
t1 = 20.6ms t2 = 21ms
t2
t1
twd
td = 155ms
VCC
5V
NTRIG
NRES
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Replacing the resistor R2 results in a frequency change of the internal oscillator. This in turn results in different watchdog
timing. The following formula demonstrates how the frequency of the internal oscillator depends on the value of the resistor
R2. For more information, see the Atmel ATA664251 datasheet. The resistor Rwd_osc in the datasheet corresponds to
resistor R2 on the board:
tOSC [RWD_OSC] = 0.405 RWD_OSC – 0.0004 (RWD_OSC)2
tOSC in µs
RWD_OSC in k
With the values given in the datasheet, all relevant watchdog times (such as the open window and closed window) can be
calculated using tOSC.
In general, the AT90USB1287 is shipped with an oscillator start-up time of 65ms. Due to the extra-long lead time of 155ms it
should be possible in almost all cases to meet the first open window of the watchdog. If more time is needed, the 65ms
default start-up time of the microcontroller can be reduced via the fuse bits to 4.1ms or even 0ms. The IC mounted on the
board is shipped preset to a start-up time of 65ms.
3.1.4 The LIN Interface (LIN, TXD, and RXD)
A low-side driver with internal current limitation and thermal shutdown, and an internal pull-up resistor in compliance with the
LIN 2.1 specification are implemented. The allowed voltage range is from –30V to +40V. Reverse currents from the LIN bus
to VS are suppressed, even in the event of GND shifts or battery disconnection. The LIN receiver thresholds are compatible
with the LIN protocol specification. The fall time from recessive to dominant bus state and the rise time from dominant to
recessive bus state are slope-controlled.
For higher bit rates the slope control can be switched off by setting the SPI-bit LSME. Then the slope time of the LIN falling
edge is < 2µs. The slope time of the rising edge is highly dependent on the capacitive load and the pull-up resistance at the
LIN line. To achieve a high bit rate Atmel recommends using a small external pull-up resistor (500) and a small capacitor.
This allows very fast data transmission of up to 200kBit/s, e.g., for electronic control tests of the ECU, microcontroller
programming, or data download. In this high-speed mode superior EMC performance is not guaranteed.
Note: The internal pull-up resistor is only switched on in active mode and when the LIN transceiver is activated by the
LINE bit (active mode with LIN bus transceiver).
Because the two TXD and RXD pins on the LIN SBC are controlled by the microcontroller’s LIN/UART, they are connected
to the corresponding TXD and RXD pins on the microcontroller and can be monitored at these pins. Test points have been
provided on the development board.
3.1.4.1 TXD Input Pin (LIN SBC)
The TXD pin is the microcontroller interface for controlling the state of the LIN output. TXD must be pulled to ground in order
to keep the LIN bus in the dominant state. If TXD is high or not connected (internal pull-up resistor), the LIN output transistor
is turned off and the bus is in recessive state.
If configured, an internal timer prevents the bus line from being constantly driven in the dominant state. If TXD is forced to
low for longer than tDOM, the LIN bus driver is switched back to recessive state. TXD has to be switched to high for at least
tTOrel to reactivate the LIN bus driver (by resetting the time-out timer).
As mentioned above, this time-out function can be disabled via the SPI configuration register in order to achieve any long
dominant state on the connected line (such as PWM transmission or low bit rates).
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3.1.4.2 RXD Output Pin (LIN SBC)
This output pin reports the state of the LIN bus to the microcontroller. SLIN high (recessive state) is reported by a high level,
LIN low (dominant state) is reported by a low level at RXD. The output has push-pull characteristics, meaning no external
time-defining measures are required. The RXD pin is at high level during disabled LIN-PHY states (configuration bit “LINE” =
0).
Please note that the signal on the RXD pin is not valid for a certain period of time upon activation of the LIN transceiver
(tRXDinvalid).
Figure 3-2. RXD Timing upon Transceiver Enab le
RXD is switched off in sleep and unpowered mode.
3.1.5 Interrupt Request Output Pin (NIRQ)
The interrupt request output pin is an open drain output and switches to low whenever a chip-internal event occurs that is set
up to trigger an interrupt. A power-up, a wake-up over LIN bus, a change in a switch state, or an overtemperature condition
are examples of such events. The pin remains at ground until the end of the next SPI command, at which point the interrupt
source is passed to the SPI master.
3.1.6 CL_15 (LIN SBC)
This CL15 pin is a high-voltage input that can be used to wake up the device from sleep mode. It is an edge-sensitive pin
(low-to-high transition). Thus, even if CL15 pin is at high voltage (VCL15 > VCL15th), it is possible to switch to sleep mode.
The CL 15 pin is usually connected to the ignition for generating a local wake-up in the application if the ignition is switched
on. If not needed, the CL15 pin should be tied directly to ground. A debounce timer with a value tdebCL15 of typically 160µs
is implemented. The pin state (CL15 ON or OFF) can be read out through the SPI interface.
3.1.7 VBATT Pin
The VBATT is a high-voltage input pin for performing measurements using a voltage divider. The latter provides a low-
voltage signal at the VDIV pin that is linearly dependent on the input voltage. In an application with battery voltage
monitoring, this pin is connected in series to VBattery via a 51 resistor and a 10nF capacitor to GND. The divider ratio is
1:4. This ratio results in maximum output voltages on the VDIV pin when 20V is reached at the input.
3.1.8 NRES Output Pin (LIN SBC) and PB6/Reset Input Pin (Microcontroller at the PC Interface Board)
The NRES reset output pin is an open-drain output and switches to low during a VCC undervoltage event or a watchdog
timing window failure. Please note the reset hold time of typically 4ms has disappeared after the undervoltage condition. The
PB6/reset input pin already has a pull-up resistor included with resistance between 30k and 60k. The NRES output pin of
the LIN SBC is connected by default to the PB6 input pin of the microcontroller at the PC Interface board. The NRES pin can
be connected to the reset pin of the microcontroller via the JP2 jumper (PC interface board). An additional 10k pull-up
resistor is included on the development board to have a defined value of the NRES output in case the PJ2 is left open.
Because the NRES output is an open-drain output, it is not necessary to remove the J2 jumper (only if placed on position 1
and 2) during programming or debugging of the microcontroller.
LIN bus state
0 = DOM --- 1 = REC
NCS
RXD X
tRXDinvalid
SPI word with LINE = 1
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3.1.9 VDIV Input/Output Pin
This pin handles two different functions. During the VCC start-up and watchdog reset phase (pin NRES driven to LOW), the
pin acts as the input and determines the setting of the WDD bit within the SPI configuration register (see Figure 3-3). In other
words, if the window watchdog operation were disabled directly after power-up (e.g., for microcontroller programming or
debugging purposes), the VDIV pin would have to be tied to the HIGH level until the reset phase ends (pin NRES has a
positive slope from LOW to HIGH). In other cases, such as when the VDIV pin is not driven actively by the application, the
signal is assessed as LOW and the WDD bit (watchdog disable) is thus also low and the window watchdog is operational
(see
Figure 3-3).
Figure 3-3. WDD Configuration Bit Setup During VCC Start-up
During normal operation, this pin provides a low-voltage signal for the ADC such as for a microcontroller. It is sourced either
by the VBATT pin or one of the switch input pins CS1 to CS8. An external ceramic capacitor is recommended for low-pass
filtering of this signal (10nF mounted on the board by default; depending on the timings in the current application, this value
should be adjusted). If selected in the configuration register of the SPI, this pin guarantees a voltage- and temperature-stable
output ratio of the selected test input and is available in all modes except sleep mode. Please note that the current
consumption values in the active low-power mode of the Atmel ATA664251 indicated in the electrical characteristics lose
their validity if the VDIV output pin is being used in this low-power mode. The voltage on this pin is actively clamped to VCC
if the input value would lead to higher values.
3.1.10 IREF Output Pin
This pin is the connection for an external resistor toward ground. It provides regulated voltage which causes a resistor-
dependent current to be used as reference for the current sources in the switch interface I/O ports. Fail-safe circuitry detects
if the resistor is missing or if there is a short circuit toward ground or VCC on this pin. An internal fail-safe current is
generated in this event.
3.1.11 CS1 to CS8 High-Voltage Input/Out p ut Pins
These pins are intended for contact monitoring and/or constant current sourcing. A total of eight I/Os (pins CS1 through
CS8) are available, of which three (CS1, CS2, and CS3) can be configured either as current sources (such as for switches
toward ground) or as current sinks (such as for switches toward battery). The other five pins (CS4 to CS8) have current
sourcing capability. Apart from a high-voltage (HV) comparator for simple switches, the I/Os are also equipped with a voltage
divider to enable analog voltage measurements on HV pins by using the ADC of the application’s microcontroller. Also, each
input can trigger an interrupt upon state change even while low-power mode is active.
NRES
VDIV (driven externally)
WDD config bit state
Logic Level “A”
Logic Level “A”
Z (high imp.)
X
“LOW” from VCC startup
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3.1.12 PWM1...3 Input Pins
These pins can be used to control the switch interface current sources directly, such as for pulse width-modulated load
control or for pulsed switch scanning. For example, they accept logic level signals from the microcontroller and are equipped
with
pull-down structures so that the input is well defined in case of an open connection. For more information, see the “Switch
Interface Unit” section in the Atmel ATA664251 datasheet.
The assignment of the current sources to the three PWM input pins is shown in Table 3-1.
3.1.13 PA0…7 Input/Output Pins
All I/O pins are easily accessible – PA0…7 on Header X2. Most of the I/O ports are hardwired to the corresponding pins of
the SBC. Table 3-4 on page 29 shows the connection between the Atmel ATtiny167 and the SBC. Cut-straps are available to
remove the connection between the AVR and the SBC. For more information about the function of the I/O pins, please see
the datasheet of the Atmel ATA664251.
3.1.14 PB0…7 Input/Output Pins
All I/O pins are easily accessible – PB0…7 on header X3a and X3b. Most of the I/O ports are hardwired to the corresponding
pins of the SBC. Table 3-2 shows the connection between the Atmel ATtiny167 and the SBC. A cut-straps are available to
remove the connection between the AVR and the SBC. For more information about the function of the I/O pins, please see
the Atmel ATA664251 datasheet.
Table 3-1. CSx Port Configuration Table
PWM Port CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8
PWM1 x - - - - - x X
PWM2 - x - - x x - -
PWM3 - - x x - - - -
Table 3-2. Hardwire Connections betwe en the Atmel ATtiny167 and the SBC Table
ATtiny167 SBC
PA0 RXD
PA1 TXD
PA2 To switch S21
PA3 VDIV
PA4 To switch S20
PA5 To switch S20
PA6 NCS
PA7 Over C300 (100nF) to GND
PB0 To switch S21
PB1 To switch S20
PB2 To switch S20
PB3 NTRIG
PB4 PWM3
PB5 PWM2
PB6 NIRQ
PB7 To jumper J12
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3.2 Pin Description - Atmel ATAB0004A Board (PC Interface Board)
3.2.1 PD4 to PD6 and PC5
Three LEDs are connected to PD4 - PD6 and are used for indicating the status of the SBC:
●Green LED connected to PD4, ON when the SBC is in active mode
●Yellow LED connected to PD5, ON when the SBC is in low active mode
●Red LED connected to PD6, ON when the SBC is in sleep mode
A buzzer is connected to PC5. Currently not used, but if needed can easily be activated via software for any sound
indication.
3.2.2 JTAG Header
The JTAG header allows users to upload and debug their application with the JTAG programmer.
Figure 3-4. The JTAG Header
3.2.3 ISP Hea der
The ISP header can be used to program the Atmel® AT90USB1287 through in-system programming.
Figure 3-5. 6-Pin ISP Connector Pinout
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3.2.4 Re se t Bu tt on
The “RESET” push button resets the target AVR® device when pushed.
Figure 3-6. Reset Button
3.2.5 Boot Loader Button
The “HWB” push button is used to switch the AVR to DFU mode (boot loader).
The HWB mode of this pin is active only when the HWBE fuse is enabled.
The following steps enable DFU mode:
1. Press and hold the “HWB” push button.
2. Press the “RESET” push button.
3. Release the “RESET” push button.
4. Release the “HWB” push button.
Figure 3-7. Boot Loader Button
3.2.6 Other Pins
All remaining pins not described in this section do not have any special external circuitry and/or are used as described in
detail in the next section.
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3.3 Summary of the Pin Connection
As already described in detail in the previous sections, there are some pins tied together on the development board. The pin
connection of the Atmel ATAB664251A board and ATAB0004A board is summarized in Table 3-3.
The three connections marked in bold are made via jumpers and the other connections are hardwired with a test point for
easy access.
Table 3-3. Summary of the Hardwired Pins on the Atmel ATA664251 Kit
Connector Pin No.
(PC Interface Board) Microcontroller Pin
(AT90USB1287) Connected to Atmel ATA664251 Connector Pin No.
(PC Interface Board)
1PC1 NIRQx 1
2PC6 NCSx 18
3PC4 PWM2 2
4PD2 RXD 17
5PB5 PWM1 3
6PE5 NTRIG 16
7PD0 PWM3 4
8PE4 NIRQ 15
9PB1 SCK 5
10 PD3 TXD 14
11 PB0 NCS 6
12 PB3 MISO 13
13 PF0 VDIV 7
14 PB2 MOSI 12
15 GND GND 8
16 PB6/Reset NRES 11
17 PF1 VDIVx 9
18 VCC_AVR VCC_SBC 10
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3.4 Jumper Description
In order to be more flexible and to meet as many requirements as possible, some jumpers are provided on the development
board. With the help of these jumpers, users have the opportunity to work with the system itself in order to test some features
and/or to modify the system to meet their requirements. In the following sections all jumpers on the development board are
briefly described.
Figure 3-8. Jumpers on the Atmel ATAK43001-V1 Kit
3.4.1 Jumper VCC - J1 (PC Interface Board)
There are three different ways to supply the microcontroller:
●Directly from the USB bus (5V supply) (jumper between 2 and 3)
●Via an on-board voltage regulator (3.3V supply) (jumper between 1 and 2) or
●Via the voltage regulator of the Atmel ATA664251 device (5V); jumper JP1 should be left unconnected and jumper
JP16 should be set (left side).
By default, this jumper is set connecting the microcontroller to the USB bus supply. Changing the position of this jumper
causes the microcontroller to be supplied via the on-board 3.3V voltage regulator.
To supply the microcontroller (AT90USB1287) from the voltage regulator of the Atmel ATA664251 device, remove this
jumper and set jumper J16 (left side).
3.4.2 Jumper Reset - J2 (PC Interface Board)
By default, this jumper is set connecting the NRES output of the LIN SBC and PB6 input of the microcontroller. If desired or
needed, or when simply changing the position of this jumper, the NRES could be connected to the reset input of the
microcontroller. This means the microcontroller is reset in the event of watchdog failure or undervoltage at the voltage
regulator output. It is helpful to leave the jumper in the default position for testing purposes, debugging, etc.
3.4.3 Jumper Reset - J12 (Atmel ATAB664251A Board)
By default, this jumper is set with the NRES output of the Atmel ATtiny167 and GND connected, thus holding the
microcontroller inside the Atmel ATA664251 device in reset. In this case the SBC is controlled from GUI via the
AT90USB1287 (on the PC interface board). To enable the ATtiny167 move this jumper to the left position or leave it open
and make sure that the jumper J16 is also set in the left position.
Setting the jumper J12 in the left position connects the reset pin of the Atmel ATtiny167 with the NRES pin of the SBC. This
means the ATtiny167 is reset in the event of watchdog failure or undervoltage at the voltage regulator output. It is helpful to
leave the jumper open for testing purposes, debugging, etc.
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3.4.4 Jumper SBC VCC - J16 (Atmel ATAB664251A Board)
By default, this jumper is not set and the microcontroller (AT90USB1287) is supplied either from the USB or from 3.3V
external voltage regulator. To supply the microcontroller (AT90USB1287) via the voltage regulator of the Atmel ATA664251
this jumper has to be set on the left side and the jumper J1 (PC interface board) has to be removed.
Setting this jumper on the right side the Atmel ATtiny167 within the Atmel ATA664251 device powers it. In this case please
make sure that neither the jumper J12 is set to the right side (GND) nor the PC interface board is plugged to the
ATAB664251A board.
3.4.5 Jumper Settings for the CSx Port s (Atmel ATAB664251A Board)
The I/Os pins are intended for contact monitoring and/or constant current sourcing. For maximum flexibility there are various
components that can be easily connected to the HV I/O ports. The following sections provide a detailed description of how
the CSx port hardware can be configured.
3.4.5.1 Jumpers of CS1…3
Jumper JP1…3
With the jumper header JP1…3 the user can select whether an RGB LED, three simple LEDs (connected in series), rotary
switch, or a push button is connected to the respective CSx port.
Figure 3-9. Jumpers JP1…3
By default, this jumper is set so that the CS1…3 ports are connected to the three simple LEDs (red) - LD1…3, LD7…9 and
LD13…15. Those LEDs are hardwired to VBAT so that the LEDs are turned on when one or all of the CS1…3 ports are
configured as low-side and are enabled.
For demonstration purposes a second jumper (in addition to the default jumper) could be set, connecting the three green
LEDs, showing that by only changing one bit the CS1…3 ports can be configured as high-side or low-side. In the case the
supply voltage has to be lower than 10V (see Figure 8-2 on page 46).
If customer-specific circuitry needs to be connected to one or all of the CS1…3 ports, the jumper has to be disconnected and
the customer circuitry can then be connected to one of the pins on the upper side of the pin headers PJ1…3.
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Jumper JP9…JP11
The I/Os pins CS1 to CS3 can be configured either as current sources (such as for switches toward ground) or as current
sinks (such as for switches toward battery). With the jumpers JP9…11 the user can specify if the particular CSx port should
be connected to ground or the VBAT. By default, these jumpers are set connecting the CS1…3 ports with VBAT.
3.4.5.2 Jumper o f C S 4… 8 - JP4 …8
With the jumper header JP4…8 the user can select whether three simple LEDs (connected in series), a rotary switch, or a
push button is connected to a given CSx port. By default, this jumper is set so that the CS4…8 ports are connected to the
three simple LEDs (green) - LD19…33.
If customer-specific circuitry needs to be connected to one or all of the CS4…8 ports, the jumper has to be disconnected and
the customer circuitry can then be connected to one of the pins on the upper side of the pin headers PJ4…8.
Figure 3-10. Jumpers JP4…8
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3.5 LEDs Description
Figure 3-11 . LEDs on the Atmel ATAK43001-V1 Kit
3.5.1 Power LED (PC Interface Board)
The blue USB power LED is connected directly to the VCC pin of the USB connector (see Figure 3-11, reference point 19).
The SBC power LED is always lit when power is available at the USB connector.
3.5.2 Power LED (Atmel ATAB664251A Board)
The blue SBC power LED is connected directly to the VS pin of the Atmel ATA664251 device (see Figure 3-11, reference
point 24). The SBC power LED is always lit when power is available at the VBAT and GND connector (reference point 1). For
current consumption measuring purposes the SBC power LED and the VCC SBC LED might have to be disabled. To do so,
the resistors R38 and R39 have to be desoldered.
3.5.3 Mode Status LEDs (PC Interface Board)
There are 3 LEDs (see Figure 3-11, reference point 21) on the PC interface board. The preprogrammed firmware in the
Atmel AT90USB1287 uses these 3 LEDs to display the current mode of the Atmel ATA664251:
●LD4 (green) - active mode
●LD3 (red) - sleep mode
●LD2 (yellow) - active low-power mode
These 3 LEDs can be used for any indication or debug purposes.
3.5.4 VCC SBC LED (Atmel ATAB664251A Board)
The green VCC SBC LED on the Atmel ATA66xA board is connected directly to the VCC pin of the Atmel ATA664251 device
(see Figure 3-11, reference point 19). This LED is always lit when the Atmel ATA664251 is in active mode. The voltage
regulator of the Atmel ATA664251 device is only on in active mode; in all other modes it is off.
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3.5.5 RGB LED (Atmel ATAB664251A Board)
An RGB LED is mounted on the Atmel ATA664251 board to demonstrate that the Atmel ATA664251 is capable of driving
RGB LEDs. The RGB LED is connected via jumpers J1…J3 to the CSx ports as follows:
●CS1 - blue
●CS2 - red
●CS3 - green
The RGB LED is hardwired to GND. Therefore, when using the RGB LED (see Section “Jumper JP1…3” on page 25 for
correct jumper settings), the CS1…3 ports have to be high-side configured. The RGB LED can be permanently driven with
the selected constant current (see Section 3.6.6 “Changing the Current Level of the Current Sources” on page 31) from the
CS1…3 ports or with PWM signals fed on the PWM1…3 pins of the Atmel ATA664251 device (for more information, see
Section 5. “Atmel ATA664251 Demo GUI Description” on page 33 and the Atmel ATA664251 datasheet).
3.5.6 Low-Side LEDs (A tmel ATAB664251A Board)
The red LEDs LD1…3, LD7…9 and LD13…15 are hardwired to VBAT and via the jumpers JP1…JP3 to the CS1…3 ports of
the Atmel ATA664251 device.
When one or all of the CS1…3 ports is/are configured as low-side and enabled, and the jumpers JP1…3 are set so that the
red LEDs are connected to the CS1…3 ports (see Section “Jumper JP1…3” on page 25 for correct jumper settings), then
the red LEDs are lit.
3.5.7 High-Side LEDs (Atme l ATAB664251A Board)
The green LEDs LD4…6, LD10…12 and LD16…33 are hardwired to VBAT and via the jumpers JP1…JP8 to all CS1…8
ports of the Atmel ATA664251 device.
When one or all of the CS1…8 ports is/are enabled (CS1…3 have to be configured as low-side) and the jumpers JP1…8 are
set so that the green LEDs are connected to the CS1…8 ports (see Section “Jumper JP1…3” on page 25 and Section
3.4.5.2 “Jumper of CS4…8 - JP4…8” on page 26 for correct jumper settings), then the green LEDs are lit.
3.6 Other Components
The development board for the Atmel ATA664251 comes with some additional components which can be replaced in order
to adapt the LIN node to user-specific requirements. These components are shown and described in the following sections.
3.6.1 Push Buttons (Atm el ATAB664251A Board)
There are eight push buttons on the Atmel ATA664251 board demonstrating the switch scanning/monitoring capability of the
Atmel ATA664251.
The push buttons S1…3 can be connected to GND or VBAT via the jumpers JP9…11. The push buttons 4…8 are hardwired
to GND.
All 8 push buttons are connected to the CS1…8 ports via the jumpers JP1…8 (see Section “Jumper JP1…3” on page 25
and Section 3.4.5.2 “Jumper of CS4…8 - JP4…8” on page 26 for correct jumper settings).
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3.6.2 Rotary Switches (Atmel ATAB664251A Board)
Eight rotary switches are mounted on the Atmel ATAB664251A board to simulate coded switches. The rotary switches S can
be connected to GND or VBAT via the jumpers JP9…11. The rotary switches S10, S12, S14, and S16 are hardwired to
GND.
All eight rotary switches are connected to the CS1…8 ports via the jumpers JP1…8 (see Section “Jumper JP1…3” on page
25 and Section 3.4.5.2 “Jumper of CS4…8 - JP4…8” on page 26 for correct jumper settings).
Figure 3-12. Rotary Switches S2, S4, and S6
Figure 3-13. Rotary Switches S10, S12, S14, and S16
Table 3-4. Coding of the Rotary Switches
Position 0 1 2 3 4 5 6 7 8 9
Code
8 X X
4 X X X X
2 X X X X
1 X X X X
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When one or all of the CS1…8 ports is/are enabled and the jumpers JP1…8 are set so that the rotary switches are
connected to the CS1…8 ports (see Section “Jumper JP1…3” on page 25 and Section 3.4.5.2 “Jumper of CS4…8 - JP4…8”
on page 26 for correct jumper settings), a different voltage value resulting from the CSx output current, dependent on the
position of the rotary switch, can be measured (and displayed in the GUI) on the VDIV pin (see also Section 5.6 “Voltage
Divider Section” on page 38).
3.6.3 Configuring the Atmel ATAK43001-V1 Kit as a Master or a Slave Node
Both the LIN2.0 and LIN2.1 specifications specify that the master node in a LIN network has to be set up as shown below.
Figure 3-14. External Circuitry for a LIN Master Node
The difference between a master node and a slave node with regard to the hardware is the additional diode Dser_master
together with a serial 1k pull-up resistor between Vsup and the LIN line. The two components D1 and R42 on the
ATA66B4251A board required for LIN master applications are shown in Figure 3-15.
Figure 3-15. The Diode and Resistor Required for LIN Master Applications
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3.6.4 Generating a Local Wake-Up on CL15
A positive edge at pin CL15 followed by a high-voltage level for a given time period (> tCL15deb) results in a local wake-up
request and the device switches to active mode. The debounce time ensures that no transients at CL15 create a wake-up.
In order to show this function easily a switch is implemented between the CL15 pin and VS. When the device is in sleep
mode, pressing the S115 switch generates a wake-up pulse. The local wake-up request is indicated by a low level at the
NIRQ pin, generating an interrupt for the microcontroller, which is displayed in the GUI.
Figure 3-16. Button for Local Wake-Up on CL15
3.6.5 Changing the Watchdog Timings
On the Atmel ATA66B4251A board, the watchdog timing is generated by default with the help of the 51k resistor R2
connected between the WD_OSC pin and ground. In order to change these timings, the resistor R2 has to be changed. A
description of how the R2 resistor influences the watchdog timing can be found in Section 5.7 “Watchdog Section” on page
39 (NTRIG, WD_OSC, and NRES) and in the Atmel ATA664251 datasheet.
3.6.6 Changing the Current Level of the Current Sources
The current sources are available in active mode. They deliver a current level derived from a reference value measured at
the IREF pin. This pin is voltage-stabilized (VIREF = 1.23V typ.) so that the reference current is directly dependent on the
externally applied resistor (R3) connected between the IREF pin and ground. The resulting current at the CSx- pins is
(1.23V/RIref)rICS.
By default, a 12k resistor is mounted between IREF and GND; therefore the resulting current at the CSx pins is 10mA
(assumed IMUL = '0' => rICS_H = 100).
Both a missing and a short-circuited resistor are detected. In this case, an internally generated reference current IIREFfs is
used instead to maintain fail-safe functionality.
3.6.7 Using the ATAB664251A Board Stand-Alone
The Atmel ATA664251 kit allows users to learn more about Atmel ATA664251 device features by using the demo GUI but
also to build their own applications and write own software using the kit.
Only a few steps are needed to prepare the kit before creating your own applications. First, disconnect the PC interface
board from the ATAB664251A board, then remove the J12 jumper (for debug and test purposes it should be left open) and
set the J16 jumper to the right side. Now after powering up the board the Atmel ATA664251 (the ATtiny167 and the SBC)
device is ready for use.
The Atmel ATtiny167 can be programmed and debugged with an appropriate programming tool via the ISP1 connector.
For applications where the 3x different PWM signals have to be generated to control the CS1…8 HV I/O ports (for example,
RGB LED control), the Atmel ATtiny167 and the SBC have to be interconnected in a different way because the timers of the
Atmel ATtiny167 are available on certain I/O pins only. The SPI pins (MISO, MOSI, and SCK) have an alternate function
which is needed to generate PWM signal. That is why instead of the SPI the USI interface has to be used for communicating
with the SBC. Two SMD DIP switches are included on the board to facilitate quick rerouting of the MISO, MOSI, and SCK
SBC lines to the corresponding Atmel ATtiny167 I/O pins.
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4. Programming and Debugging
The easiest way to program and to debug the Atmel® AT90USB1287 is to use the Atmel Studio environment together with
the STK500/600 or the JTAG-ICE MkII from Atmel. Atmel Studio is an integrated development platform (IDP) for writing and
debugging AVR applications in Windows® 9x/Me/NT/2000/XP/7 environments. Atmel Studio provides a project management
tool, source file editor, chip simulator, and in-circuit emulator interface for the powerful AVR 8-bit RISC family of
microcontrollers.
4.1 Programming
Connect the selected hardware (STK500/600 or JTAG-ICE MkII) to the ISP or JTAG header of the ATAB0004A board
respectively. Pin “1” is marked with two small triangles on the board. In the Atmel Studio select the Atmel AT90USB1287.
For more information about using the STK500/600, the JTAG-ICE MkII, or the Atmel Studio, see the relevant documentation
available on the Internet.
4.2 Debugging
Combined with Atmel Studio, the JTAGICE MkII can perform on-chip debugging on all AVR 8-bit RISC microcontrollers with
a JTAG or debugWIRE interface. The Atmel AT90USB1287 comes with a debugWIRE interface so only a minimum of three
wires is required for communication between the JTAGICE MkII and the board. These signals are RESET, VCC, and GND.
The debugWIRE on-chip debug system uses a one-wire bidirectional interface to control the program flow, execute AVR
instructions in the CPU, and to program the different non-volatile memories. For debugging via debugWIRE, the reset line is
used and the NRES jumper has to be removed because the JTAG ICE mkII requires exclusive access to this line.
For more detailed information about debugging via the debugWIRE interface, see the relevant documentation available on
the Internet.
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5. Atmel ATA664251 Demo GUI Description
The Atmel® ATA664251 demo GUI (graphical user interface) is a software tool for configuring and demonstrating the Atmel
ATA664251 device using the Atmel ATAK43001-V1 kit.
The Atmel ATA664251 demo GUI was designed to minimize the learning curve for using the Atmel ATA664251 device in the
user application. It is divided into 11 main sections:
●SBC: general SBC settings and mode status
●Current SBC Status: displays the current SBC status (16-bit status register)
●Command Builder: builds a specific command and sends to the SBC
●SPI-Log-Window: the complete SPI communication is logged in here
●I/O Ports: configuration settings for all high-voltage I/O ports
●Voltage Divider: voltage divider settings and display of the currently measured voltage
●Watchdog: watchdog settings
●LIN: LIN interface settings
●PWMx: PWM test settings for the three different PWM inputs
Figure 5-1. Atmel ATA664251 Demo GUI
In the following section the Atmel ATA664251 demo GUI sections are described in detail, including some examples showing
how to configure the Atmel ATA664251 device.
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5.1 SBC Section
After executing the Atmel ATA6641xx_Demo.exe file, the Atmel ATA664251 is automatically set to active low-power mode.
This is indicated in the GUI: Figure 5-2 (yellow LED - ActiveLP is ON) and on the PC interface board (LED - LD2 is ON
(reference point 21)) as well (please see Figure 2-12 on page 13).
In this mode, only the VCC voltage regulator is active and can therefore supply the application’s microcontroller. All other
functions of the Atmel ATA664251 are disabled in the configuration register or inhibited by the PWM pins for the CSx pin
current sources. This reduces the current consumption of the chip itself to a low-power range typically below 50µA. Note that
this is only valid if the chip select input of the SPI, NCS, is also kept at a high level. If it is pulled to ground, SPI
communication is enabled, causing higher current consumption.
The Atmel ATA664251 can easily be set to active mode (simply press the “Active Mode” button) with all peripherals/functions
enabled, or set to sleep mode (simply press the “Go to Sleep” button), which switches off all peripherals, i.e., the LIN
transceiver, the watchdog, the voltage dividers, the switch interface unit, and the VCC voltage regulator. The overall supply
current on the VS pin is then reduced to a minimum (typ. 8µA). In sleep mode the GUI is also disabled and no changes can
be made as long as the device is in sleep mode.
Two wake-up mechanisms are possible for leaving the sleep mode again: wake-up via LIN and wake-up via CL15. A wake-
up via CL15 is easily generated by pressing the S115 switch.
The SPI data rate can be modified; it is 4MHz by default.
Figure 5-2. SBC Section
5.2 Current SBC Status Section
Section 5.2 “Current SBC Status Section” on page 34 indicates the status of the Atmel ATA664251. The 16 bits of the status
register, NRES, and NIRQ are displayed where the 16 status bits are updated after a new SPI command.
This means, for example, that if you enable the watchdog with an SPI command, the status “Watchdog Active” is not
reported in this data transmission but in the next one.
Depending on the setting of the VDIVE bit, the bits 15 to 12 in the status register have a different meaning:
●VDIVE=0: bits 15 to 12 show the overtemperature status of different peripherals.
Figure 5-3. Current SBC Status Section VDIVE=0
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●VDIVE=1: bits 15 to 12 show the selected source for the voltage monitor (VBATT or CS1…8).
Figure 5-4. Current SBC Status Section VDIVE=1
For more information on the single bits, see Table 7-4 in the Atmel ATA664251 datasheet.
5.3 Command Builder Section
Section 5.3 “Command Builder Section” on page 35 gives the user the ability to create and send any command to the Atmel
ATA664251 device. There are two possible ways to create a command: either by selecting the desired bits or just typing a
sixteen-bit value into the “Data to Send” field (press “Enter” to activate the typed value).
In order to avoid false watchdog disabling, the configuration bit (WDD) needs to be written twice. Therefore two consecutive
SPI words are sent in order to alter the WDD bit to ‘1’.
Depending on the setting of the CSPE bit, bit 1 in the configuration register has a different function:
●CSPE=0: bit #1 enables/disables the slope control of the CS ports
Figure 5-5. Command Builder Section CSPE=0
●CSPE=1: bit #1enables interrupt from addressed switch input (CS1…8)
Figure 5-6. Command Builder Section CSPE=1
For more information on the single bits, see Table 7-1 in the Atmel ATA664251 datasheet.
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5.4 SPI Log Window Section
The complete communication to and from the Atmel ATA664251 device is logged into the “SPI Log Window.” If a specific
command has to be resent, just copy and paste it into the “Data to Send” field in Figure 5-7 and press “Send.”
Figure 5-7. Command Builder Section
5.5 I/O Ports Section
A total of eight high-side current sources with high-voltage comparators and voltage dividers are available. Note that three of
them (CS1, CS2, and CS3) can also be switched to low-side current sinks. All eight high-voltage I/O ports can be configured
separately with the three or four configuration bits:
●CSE: Enable/disable addressed current source (CS1…CS8)
●CSC: Control of addressed current source (CS1…CS8) - controlled either by PWMy input or internally by CSE
●CSIE: Enable/disable from interrupt from addressed switch input (CS1…CS8)
●CSSSM: Switch between source/sink mode (CS1…CS3 only)
The output current level can be divided by 2 using the IMUL bit. With the default setting of IMUL = ‘x100’ the resulting current
at the CSx- pins is (1.23V/R3) x 100 = 10mA (default value for R3 is 12k).
The CSSCD bit is the one common control bit for all current sources. With this bit, the slope control of all eight sources can
be disabled. By default, the slope control is activated and all currents are switched on and off smoothly. When setting this bit
to ‘1’ the current sources are enabled and disabled without transition times. In order to change the configuration of a certain
current source via SPI, it must be addressed and the current source programming CSPE bit must be set to ‘1’ (in the GUI this
is done automatically).
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Figure 5-8. I/O Port Section
Example 1: Enabling a particular current source and controlling it via the CSC bit or via the PWMy input:
In this example, the CS1 port is connected to the green/red LEDs (the following is valid for CS1…8). Set the J1 jumper to the
second position (counted from left to right). Then all that has to be done in the GUI is to select the corresponding CSE bit and
CSC bit (for internal control) and press the “Configure CS1” button. Now the CS1 port is enabled as indicated by illuminated
green LEDs and configured as the high-side current source and controlled by the internal logic.
The control of the current source can be easily changed to be PWM-controlled by deselecting the CSC bit and pressing the
“Configure CS1” button again; this turns off the LEDs. The PWM1 pin is assigned to the CS1 port. By default the PWM mode
in the GUI is set to static-low, meaning the PWM1 input is actively kept to low. To turn on the LED the PWM must be
changed to static-high, which is equal to CSC=1, or “pulsed” selected where the signal with default period (1ms) and pulse
width (100µs) is to be generated on the PWM1 pin. To adjust the brightness of the LEDs, simply change the period and the
pulse width as desired.
To configure the CS1 port as the low-side current source (this is only valid for CS1…3), simply set the CSSSM bit and set
the jumper at the very first position on the left side.
Example 2: Connecting a switch to a specific current source (Contact Monitoring):
Now the CS1 port is connected to a tactile switch (S1) (the following is valid for CS1…8). Change the jumper setting of J1 to
the second position from the right, with jumper J9 connecting the middle and right pin (the tactile switch is connected toward
GND). Configure and enable a high-side current source for the CS1 port (set CSE and CSC bits and press “Configure CS1”
button). From the voltage divider section, select the CS1 port as ADC source and activate continuous voltage measurement.
By pressing the tactile switch (S1) the measured voltage in the voltage divider section changes to 0V because the CS1 port
is then (when S1 is pressed) connected directly to GND. This status change is also indicated with the CS1CS bit in the status
register. Please note that the status bits in the “Current SBC Status” section are updated only after an SPI command has
been sent.
Now the interrupt from the CS1 port is enabled and the CS1 port to be PWM1-controlled is configured. To do this, set the
CSIE bit and deselect the CSC bit. Finally, press the “Configure CS1” button and set the pulsed mode in the PWM1 section.
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Now the output state of the HV comparator is sampled with each falling edge of the PWMy or CSC signal. As soon as the
sampled state changes (S1 pressed), an interrupt request is generated and reported by a low level on the NIRQ pin
(automatically displayed in the “Current SBC Status” section). Please bear in mind that the NIRQ pin remains at ground until
the end of the next SPI command.
The same can be done when the CS1 port is configured as low-side current source (enable the CSSSM bit and change the
setting of the J9 jumper to the left) (this is only valid for CS1…3).
5.6 Voltage Divider Section
The VDIV pin provides a low-voltage signal for the microcontroller’s ADC which is linearly dependent on the input voltage. It
is sourced either by the VBATT pin or one of the switch input pins CS1 to CS8.The divider ratio of the measured input
voltage for the Atmel ATA664251 is 1:4. This results in maximum output voltages on the VDIV pin when reaching 20V at the
input.
The voltage on this pin is actively clamped to VCC if the input value would lead to higher values.
Figure 5-9. Voltage Divider Section
The displayed voltage value in the voltage divider section is the result of the following equation:
Input_Voltage = (Divider_Ratio VDIV_Value Reference_Voltage)/1023
●Input_Voltage is the measured and displayed voltage.
●Divider_Ratio is 4.
●VDIV_Value is the measured voltage at the VDIV pin.
●Reference_Voltage is the internal reference voltage of the microcontroller, which is dependent on the microcontroller’s
supply voltage (for setting jumper J1 and J16, see Section 3.4.1 “Jumper VCC - J1 (PC Interface Board)” on page 24
and Section 3.4.4 “Jumper SBC VCC - J16 (Atmel ATAB664251A Board)” on page 25).
Because the supply voltage of the microcontroller is not measured precisely, a fixed values of 5.0V for the
Reference_Voltage is used. If a more precise display of the measured voltage is desired, the real supply voltage of the
microcontroller has to be measured and typed in the “Ref. Voltage” field. This value is used in the equation above to
calculate the input voltage only when the
button is pressed. The input voltage can be measured continuously or at intervals.
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5.7 Watchdog Section
The watchdog expects a trigger signal from the microcontroller at the NTRIG (negative edge) input within a time window of
twd =t
NTRIG. The trigger signal must exceed a minimum time ttrigmin > 7µs. If a triggering signal is not received, a reset signal
will be generated at output NRES. The timing basis of the watchdog is provided by the internal watchdog oscillator. Its time
period, tWDosc, is adjustable between 20ms and 64ms using the external resistor R2 (34k …120k; the default value is
51k). During sleep mode the watchdog is switched off to reduce current consumption.
The GUI offers the option of experimenting with trigger values (simply change the tNTRIG value) or even disabling the trigger
signal in order to gain a better understanding of how the watchdog works.
Figure 5-10. Watchdog Section
In order to avoid false watchdog disabling, this configuration bit (WDD) needs to be written twice. Therefore two consecutive
SPI words are sent in order to alter the WDD bit to ‘1’.
To disable the watchdog directly after power-up (e.g., for microc ontroller programming or debuggi ng purposes)
(i.e., after external power-up or after sleep mode), the VDIV pin has to be tied to VCC until the start-up time treset of
typ. 4ms has elapsed.
The minimum time for the first watchdog pulse is required after the undervoltage reset at NRES disappears. It is defined as
lead time td= 155ms (for more information, please see Section 10 in the Atmel ATA664251 datasheet). After wake-up from
sleep mode, the lead time td starts with the positive edge of the NRES output.
5.8 LIN Section
The LIN interface of the Atmel ATA664251 device has to be activated via an SPI command. This is done with the GUI by
simply pressing the “LIN Interface” button.
Figure 5-11. LIN Section
The slope control of the LIN transceiver can be switched off to achieve higher bit rates (up to 200kBit/s). Then the slope time
of the LIN falling edge is < 2µs. The slope time of the rising edge greatly depends on the capacitive load and the pull-up
resistance at the LIN line. To achieve a high bit rate Atmel recommends using a small external pull-up resistor (500) and a
small capacitor. Superior EMC performance is not guaranteed in this high-speed mode.
For test purposes a test signal (10Hz - 200kHz) can be generated at the TXD pin and if the LIN interface is enabled, the
same signal can be observed at the LIN pin.
In order to achieve any long dominant state on the pin LIN (such as PWM transmission or low bit rates), the time-out function
can be easily disabled by pressing the “TXD Time-Out” button.
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5.9 PWMy Section
There are three PWM sections in the GUI where a specific PWM signal can be generated at the corresponding PWM inputs
of the Atmel ATA664251 device.
Figure 5-12. PWM Section
The switch interface current sources can be controlled directly via the PWMy input pins, such as for pulse-width-modulated
load control or for pulsed switch scanning.
The assignment of the current sources to the three PWM input pins is shown in Table 5-1.
To enable the external control functionality of a given current source the relevant CSC bit should be disabled (please see
Section 5.5 “I/O Ports Section” on page 36). External PWM signals could be applied at the PWMy input pins or the GUI could
be used to generate a PWM signal on the PWMy input pins. In the PWM 1…3 sections in the GUI three independent PWM
signals can be generated; just type in the desired period and pulse width and select “pulsed” as the PWM mode. The PWM
3 signal is generated by using the 8 bit timer of the AT90USB1287 (PC Interface board), therefore fine settings for the
“PWM3-Pulsewidth” are not possible like for the PWM 1 and PWM 2, where 16 bit timers are used to generate the PWM
pulses.
Table 5-1. CSx Port Configuration Table
PWM Port CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8
PWM1 x - - - - - x x
PWM2 - x - - x x - -
PWM3 - - x x - - - -
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6. Operation Using the Default Software
6.1 Standalone Demonstration Quick Start User Guide
As the SiP on the Atmel® ATAB664251A-V1.0 includes an Atmel ATtiny167 AVR® 8-bit microcontroller, the Atmel
ATAB664251A-V1.0 board can operate “standalone” without the PC interface board connected. The following sections
describe standalone operation with the default software programmed in the Atmel AVR 8-bit microcontroller.
6.1.1 Configuration for Standalone Operation
1. Disconnect the PC interface board
2. Configure the jumpers and switches
●Jumper reset - J12 (Atmel ATAB664251A board)
Jumper J12 controls the reset signal to the Atmel ATtiny167 microcontroller. Remove jumper J12 or set jumper
J12 in left side (NRES) for standalone operation. Refer to Section 3.4.3 “Jumper Reset - J12 (Atmel
ATAB664251A Board)” on page 24 for additional information concerning this jumper.
●Jumper SBC VCC - J16 (Atmel ATAB664251A board)
Jumper J16 controls the supply voltage to the Atmel ATtiny167 microcontroller. Set jumper J16 to the right side
(VCC microcontroller) for standalone operation. Refer to Section 3.4.4 “Jumper SBC VCC - J16 (Atmel
ATAB664251A Board)” on page 25 for additional information concerning this jumper.
●Jumper J1 to J3
Set jumpers J1, J2 and J3 each to the left-most position to connect the constant current source to the RGB
LED (LD36).
●Jumper J4
Set jumpers J4 to the right-most position to connect to the push button S7.
●Jumper J5 to J8
Set jumpers J5, J6, J7 and J8 each to the left-most position to connect the constant current source to the green
LED’s (LD22 through LD33).
●Switch S20 and S21
Switches S20 and S21 are used to select the peripheral used for the SPI communication between the Atmel
ATtiny167 microcontroller and the Atmel ATA664151 LINSBC. If both switches S20 and S21 are in the right
position, the USI peripheral in the Atmel ATtiny167 microcontroller is used to communicate with the LINSBC. If
both switches S20 and S21 are in the left position, the SPI peripheral in the Atmel ATtiny167 microcontroller is
used to communicate with the LINSBC. For standalone operation with the default software programmed in the
Atmel AVR 8-bit microcontroller, switches S20 and S21 should be set in the right position (USI).
●Header X4
Apply 12V power and ground to header X4.
6.1.2 Standalone Demonstration Operation
After applying power to header X4, the blue power LED (LD34) and green VCC SBC LED (LD35) should be on indicating
power is supplied to the Atmel ATtiny167 microcontroller. The RGB LED (LD36) should show blue, the LEDs assigned to
CS5
(LD22-LD24) should flash approximately 0.5 seconds on - 0.5 seconds off, and the LEDs connected to CS6 (LD25-LD27)
should be on.
After powering up, subsequent presses of the push button (S7) connected to CS4 will cycle LED’s in the following manner,
demonstrating the capabilities of the device to interface to switch type inputs and drive outputs:
RGB LED (LD36): RED → GREEN → WHITE → OFF → BLUE → RED → …
LEDs connected to CS6-CS8 (LD25-LD33): Cycle through binary codes for 2 → 3 → 4 → 5 → 6 → 7 → 0 → 1 → …
(LEDs connected to CS6 represent the least significant bit of the binary code)
The LEDs connected to CS5 (LD22-LD24) should continue to blink on-off at the same rate.
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6.2 LIN Slave Node Demonstration Quick Start User Guide
The default standalone demonstration software also includes the capability for the Atmel® ATAB664251A board to operate
as a LIN slave node responding to messages from a LIN master node. Among other things, the standalone demonstration
illustrates the use of the LIN SIP for ambient lighting applications by controlling the RGB LED based on messages received
from a LIN master node.
6.2.1 Configuration for Ambient Lighting LIN Slave Node
The Atmel ATAB664251A board should be configured as described in Section 6.1.1 “Configuration for Standalone
Operation” on page 41. In addition, the LIN BUS from the LIN master node should be connected to header X5.
The Atmel AT32UC3C-EK evaluation kit (available separately) can be utilized as the LIN Master. Software is available from
Atmel for this kit to configure it to send ambient lighting messages over the LIN bus in response to actions on the kit’s user
interface, allowing the user to send different RGB values to each of several ambient lighting slave nodes. Each slave node
should respond only to the ambient lighting messages directed to its slave node address.
6.2.2 Ambient Lighting LIN Slave Node Operation
The ambient lighting slave node address of the Atmel ATAB664251A board is selected using the push button (S7)
connected to CS4. Successive presses of this push button increment the slave node addresses from 1 through 7; after
address 7, a press of the push button selects an invalid slave address (meaning the board will not respond to any ambient
lighting messages). A subsequent press of the push button after this starts the sequence again with a slave address of 1.
The selected slave address is displayed in binary code on the LEDs connected to CS6-CS8 (LD25-LD33) with the LEDs
connected to CS6 representing the least significant bit of the binary code. The invalid slave address is indicated by all the
LEDs (LD25-LD33) being off.
The Atmel ATAB664251A board will respond to ambient lighting messages targeted to its slave node address, allowing the
RGB LED on the board to be controlled from a LIN master node.
6.2.3 LIN Messages Supported in the Default Software
In addition to the LIN messages used for ambient lighting control, several other LIN messages are supported in the default
software on the Atmel ATAB664251A board. These LIN messages allow for complete control of the LIN SBC features from a
LIN master node.
Table 6-1. LIN Messages
Message PID Direction(1) Data Notes
Set SBC
configuration
register
0x23 Receive 2 bytes:
Bit 15 to Bit 0: Configuration register
1 - The received value is transferred
over SPI to the LIN SBC.
2 - Ambient lighting operation will not
work properly after this message is
received.
Set PWM period
and duty 0x25 Receive
8 bytes:
Bit 15 to Bit 0:
Bit 31 to Bit 16:
Bit 47 to Bit 32:
Bit 63 to Bit 48:
PWM Period
PWM-1 duty cycle
PWM-2 duty cycle
PWM-3 duty cycle
Period and duty cycles are in terms of
microseconds (us); 1 count = 1µs.
Set watchdog
trigger period 0x26 Receive 1 byte:
Bit 7 to Bit 0: Trigger period
Watchdog trigger period is in terms of
milliseconds (ms); 1 count = 1 ms. A
period of 0 will not generate a trigger.
Ambient lighting 0x2C Receive
4 bytes:
Bit 7 to Bit 0:
Bit 15 to Bit 8:
Bit 23 to Bit 16:
Bit 31 to Bit 24:
Slave node address
Red duty cycle
Green duty cycle
Blue duty cycle
Duty cycles are scaled to 255 counts;
255 counts = 100% duty cycle.
Get SBC status
register and VDIV 0x24 Transmit
4 bytes:
Bit 15 – Bit 0:
Bit 31 – Bit 16:
Status register
VDIV A/D reading
The transmitted value is the value
obtained over SPI from the LIN SBC.
Note: 1. Direction is relative to the Atmel ATAB664251A board configured by default software as a LIN slave
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6.3 Default Software Overview
The following depicts an overview of the default software programmed in the Atmel® ATtiny167 AVR® 8-bit microcontroller.
Figure 6-1. Overview of the Default Software
Reset Timer0 Overflow Interrup
Periodic at 256µs Rate
Timer1 Compare A Interrup
At PWM3 Period Completion and Duty Cycle Completion
AtaDevMCU_I nit():
- 8MHz operation w/ internal clock
AtaDevTimer_Init():
Timer0: 1Mhz clock, overflow interrupt enabled.
Provides syst em interrupt every 256µs and “virt ual”
16 Bit PWM1 output to SwitchLIN SBC
- Timer1: 8MHz clock, no interrupt s. P rovides PWM2
and PWM3 out puts to SwitchLIN SBC
AtaDevAnalog_Init():
- Software t riggered conversion of VDIV input
AtaDevSwitchLIN_Init():
- Configure USI to provide SPI interf ace to SwitchLI N SBC
Initialize PWM Duty Cycles
Initialize SwitchLIN SBC Configuration
Initialize LIN Stack
Enable Interrupts
AtaDevVDIV_Sample(): Start VDIV sampling
Manage PWM Generation for PWM3 Output
Timer1 Compare B Interrup
At PWM3 Period Completion and Duty Cycle Completion
Manage PWM Generation for PWM2 Output
LIN Transfer Complete
At LIN Transfer Complete Event
Manage LIN Communication
LIN Error
At LIN Error Event
Manage LIN Communication Errors
Manage “virtual” 16 Bit (max) PWM generation for
PWM1 output
Provide 5ms scheduler tick for background
Manage SwitchLIN SBC watchdog timer every 1ms
LIN_Periodic_Tasks(): Manage LIN slave stack
DebounceCS4_Switch(): Read CS4 push button input
Manage SwitchLIN SBC Watchdog Trigger
Process Received LIN Messages
- If Set SBC Configuration Register Mesage: Update
SwitchLIN SBC Configuration Register
- If Set PWM Period and Duty Message: Update PWM
period and duty
- If Set Watchdog Trigger Period Message: Update
SwitchLIN SBC watchdog trigger period
- If Ambient Lighting Message: If for this node address
then recale and update PWM period and duty
5ms?
AtaDevVDIV_Get(): Read VDIV from ADC
Buffer VDIV for LIN transmission
USwitch Lin Standalone Demo(): If CS4 push button
pressed, update PWM1 - 3 duty cycles in sequence
AtaDevSwitchLIN_GetStatusReg(): Read status register
from SwitchLIN SBC
Buffer Status Register for LIN Transmit
Note: Through the Timer0 overflow interrupt and the Timer1
compare A/B interrupts, the software supports generation
of the 3 PWM outputs at 3 different/ independent frequencies
AmbientLightingAddrUpdate(): If CS4 push button
pressed, update node address and address LED Indicators
Flash CS5 LED
LIN Bus
Active?
Default SBC
Configuration?
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7. Tools
In combination with the STK500 and JTAG ICE MkII, Atmel Studio is a powerful tool for programming and debugging the
AVR® microcontroller family in general.
Furthermore, Atmel® provides cost-effective software support for the development of a LIN network. These can easily be
used together with the development board.
A LIN1.3 ANSI C software library for the AVR microcontroller family is available. The software library allows programming of
protocol handling for LIN slave nodes. This library can be downloaded at http://www.atmel.com/Images/doc1637.pdf
Many OEMs demand that their suppliers use certified third-party LIN protocol stacks. To meet this requirement there are
LIN2.0 as well as LIN2.1 protocol stacks available for the large number of AVR microcontrollers from Mentor Graphics®,
Vector Informatik, Warwick Control Technologies, Dunasys, and from IHR.
Warwick Control Technologies offers the NETGEN configuration and autocoder tool. For testing purposes and to provide a
quick start to using Atmel products, there is a limited but free version available. The demo version is available at
http://www.warwickcontrol.com/
For more information about the certified LIN stacks, please contact the third-party suppliers directly.
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8. Schematics of the Atmel ATAK43001-V1 Kit
Figure 8-1. Schematics of the PC Interface Board
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Figure 8-2. Schematics of the Atmel ATAB664251A Board
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9. Board Layout
Figure 9-1. PC Interface Board Component Placement; Top Side, Top View
Figure 9-2. PC Interface Board Component Placement; Bottom Side, Top View (as if PCB was Transparent)
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Figure 9-3. PC Interface Board; To p Side, Top View
Figure 9-4. PC Interface Board; Middle Layer 1, Top Vie w (as if PCB was Trans pa rent)
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Figure 9-5. PC Interface Board; Middle Layer 2, Top Vie w (as if PCB was Trans pa rent)
Figure 9-6. PC Interface Board; Bottom Side, Top View (as if PCB was Transparent)
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Figure 9-7. Atmel ATAB664251A Board Component Placement; Top Side, Top View
Figure 9-8. Atmel ATAB664251A Board; Top Side, Top View
Figure 9-9. Atmel ATAB664251A Board; Bottom Side, Top View (as if PCB is Transparent)
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10. Atmel ATA664251 Kit BOM
Table 10-1. PC Interface Board BOM
#Designator Quantity Value Class Voltage Tolerance Description Footprint Manufacturer and Part
Number
1C1, C2, C4, C6,
C11, C12, C16 4100nF CAP 0402 0402_C
2C3 11µF CAP 0603 0603_C
3C5, C17 110µF CAP 0603 0603_C
5C7 1150pF CAP 0402 0402_C
6C8 115nF CAP 0402 0402_C
7C9, C10 222pF CAP 0402 0402_C
8C13, C15 21µF CAP 0402 0402_C
9C14 110nF CAP 0402 0402_C
11 D3 1BAS516 SOD523_D RS No: 508-282; Mfg
P/N: BAS516
12 ISP1 1Header, 3-Pin,
Dual Row
HDR2X3_CEN
2.54mm
Samtec -
TSW-105-24-S-D
13 J1, J2 2Header, 3-Pin Jumper 1x3
1.27mm
Samtec - MTMS-103.51-
S-S-130
14 JTAG1 1HDR 5X2 100MIL HDR2X5_
JTAG 2.54mm Samtec
15 L1 1IND 0603 EMI 0603_L Mouser No: 875-
MI0603J601R-10
16 L2 110µH Inductor 0603_L Würth: 744 796 8
17 LD1 1Typical BLUE
GaAs LED 0603_LED_BL RS No: 700-8026
18 LD2 1Typical YELLOW
GaAs LED 0603_LED_GE
19 LD3 1Typical RED GaAs
LED 0603_LED_rt RS No: 466-3728P
20 LD4 1Typical GREEN
GaAs LED 0603_LED_gn RS No: 466-3706P
21 Q1 116MHz Crystal Unit SMD
2.5×2.0mm CX2520 Kyocera - CX2520SB
22 R3, R4 222R RES 0402 1k 5%
0.1W 0402_R
23 R6 11k RES 0402 1k 5%
0.1W 0402_R
24 R7, R8, R9 3825R RES 0402 1k 5%
0.1W 0402_R
25 R10 1180R RES 0402 1k 5%
0.1W 0402_R
26 R15, R16 247k RES 0402 0 5%
0.1W 0402_R
27 R20, R21, R22 3nc 0603_R
28 S1, S2 2Tac t Sw itc h -
Vertical SMD B3U-1000P RS No: 682-1421
29 Sp1 1Buzzer, e.g., BST-
5523SA Buzzer_BST Mouser No: 665-
SMT0540SR
30 T1 1High-Voltage NPN
Transistor SOT23-3 RS No: 545-0438P; Mfg
P/N: MMBTA42LT1G
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31 TFT1 1Header, 4-Pin,
Dual Row HDR2X4_CEN Samtec
32 U1 1
8-bit
Microcontroller
with 64/128Kbytes
of ISP Flash and
USB Controller
QFN64_5x5 Atmel - AT90USB1287
33 U2 1VREG, 3.3V, 500A MLF 6-Pin DigiKey No: 576-2768-1-
ND; MIC5219
34 X1 1Mini USB
Connector USB-micro Samtec -
UUSB_B_S_S_SM_TR
35 X2 1Header, 9-Pin,
Dual Row
BCS-109-X-D-
HE
Samtec -
BCS-109-X-D-HE
Table 10-1. PC Interface Board BOM (Continued)
#Designator Quantity Value Class Voltage Tolerance Description Footprint Manufacturer and Part
Number
Table 10-2. Atmel ATAB664251A Board BOM
#Designator Quantity Value Class Voltage Tolerance Description Footprint Manufactu rer and Part
Number
1U1 1 - ATA664251 QFN32
5x5mm Atmel ATA664251
2C3 447nF
Surface-Mount
Ceramic
Multilayer
Capacitor
RC-0402
3C7, C10, C11,
C300 4100nF
Surface-Mount
Ceramic
Multilayer
Capacitor
RC-0402
4C5 1100nF 50V
Surface-Mount
Ceramic
Multilayer
Capacitor
RC-0603
5C6 110µF X7R 50V 10%
Surface-Mount
Ceramic
Multilayer
Capacitor
R3225 Mouser No: 81-
GRM32ER71H106KA2L
6C8 12.2µF COG 5%
Surface-Mount
Ceramic
Multilayer
Capacitor
RC-0603
7C2, C4 210nF COG 50V
(C2 only) 5%
Surface-Mount
Ceramic
Multilayer
Capacitor
RC-0402
8C1 1220pF COG 50V 5%
Surface-Mount
Ceramic
Multilayer
Capacitor
RC-0402
9D1, D7 2Diode RC-1608 BAV302
10 J12 1Jumper 1x3 2mm J12
11 J16 1 - Jumper 1x3 2mm Samtec
12 J9, J10, J11 3 - Jumper 1x3 2mm Samtec -
MTMM-103-04-T-S-140
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13 J1, J2, J3 3Jumper 2x5 2mm Samtec
14 J4, J5, J6, J7, J8 5Jumper 2x3 2mm Samtec -
MTMM-103-04-T-D-140
15 X1 Header 2x9
2,54mm
Samtec -
TSW-109-08-L-D-RA
16 X2 Header 2x4
2.54mm
17 LD34 1LED Blue RC-0603 RS No: 700-8026
18
LD1, LD2, LD3,
LD7, LD8, LD9,
LD13, LD14, LD15,
9LED Red RC-0603 RS No: 466-3728P
19
LD4, LD5,
LD6,LD10, LD11,
LD12, LD16, LD17,
LD18, LD19, LD20,
LD21, LD22, LD23,
LD24, LD25, LD26,
LD27, LD28, LD29,
LD30, LD31, LD32,
LD33, LD35
25 LED Green RC-0603 RS No: 466-3706P
20 LD36 1RGB-LED P-LCC-6 RS No: 708-0747P
21 GND 1Messbuegel
22 VB, GND, CL15,
LIN 2MessPin 1x2
2.54mm
23 R3 112k Chip Resistor
Surface Mount RC-0402
24 R39 1430R Chip Resistor
Surface Mount RC-0402
25 R40, R41 110k Chip Resistor
Surface Mount RC-0402
26 R42 11k Chip Resistor
Surface Mount R2012
27 R36, R42 247k Chip Resistor
Surface Mount RC-0402
28 R2 151k Chip Resistor
Surface Mount RC-0402
29 R38 11k Chip Resistor
Surface Mount RC-0402
30 R37 156R Chip Resistor
Surface Mount RC-0402
31
R4, R8, R12, R16,
R20, R27, R31,
R35
8820R Chip Resistor
Surface Mount RC-0402
32
R5, R9, R13, R17,
R21, R26, R30,
R34
8200R Chip Resistor
Surface Mount RC-0402
33
R6, R10, R14,
R18, R22, R25,
R29, R33
8100R Chip Resistor
Surface Mount RC-0402
34
R7, R11, R15,
R19, R23, R24,
R28, R32
8390R Chip Resistor
Surface Mount RC-0402
Table 10-2. Atmel ATAB664251A Board BOM (Continued)
#Designator Quantity Value Class Voltage Tolerance Description Footprint Manufactu rer and Part
Number
ATAN0063 [APPLICATION NOTE]
9300D–AUTO–03/15
54
35
S1, S3, S5, S7, S9,
S11, S13, S15,
S115
9Tact Switch -
Vertical SMD TL1015 Mouser No:
612-TL1015AF
36 S2, S4, S6, S8,
S10, S12, S14,S16 8Rotary Switch SMR_SW RS No:702-3381P
37 S20, S21 2SMD DIP Switch
38 X3a, X3b 2Header 2x2
2.54mm
39 ISP1 1Header 2x3
2.54mm
Table 10-2. Atmel ATAB664251A Board BOM (Continued)
#Designator Quantity Value Class Voltage Tolerance Description Footprint Manufactu rer and Part
Number
55
ATAN0063 [APPLICATION NOTE]
9300D–AUTO–03/15
11. Revision History
Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this
document.
Revision No. History
9300D-AUTO-03/15 Put document in the latest template
X
XXX
XX
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