AVR-GSM Olimex Ltd., AVR-GSM Datasheet - Page 15

• Manufacturer Part Number: AVR-GSM
• Description: MCU, MPU & DSP Development Tools DEV BRD FOR ATMEGA32 32KB FLASH 2KB RAM
• Manufacturer: Olimex Ltd.

Specifications of AVR-GSM

• Processor To Be Evaluated: ATMega32
• Data Bus Width: 8 bit
• Interface Type: USB, SPI, UART
• Dimensions: 130 mm x 82 mm
• Operating Supply Voltage: 12 V
• Tool Type: Development Kit
• Core Architecture: AVR
• Cpu Core: AVR 8
• Silicon Manufacturer: Atmel
• Silicon Core Number: ATmega32
• Kit Contents: Board
• Features: USB Interface, On-Board Temperature Digital Sensor
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 1776311 52R3434

EXT is connector for external plug-in modules. It's standard 26 pin ribbon cable IDC keyed
connector.
Backup: RTC backup power supply for the GSM module real time clock and RAM, when the
battery is discharged. If the battery attached to this signal is chargeable and the voltage
level is low the module will charge the battery. Vnom = 1.8V, Inom= 20uA
AREF: Analog reference input of ATMega32 microcontroller. Can be used for external
analogue circuits.
GND: Digital ground.
3VA: Analog power supply of ATMega32 microcontroller. This is 3VDC output which can be
used for external analog modules.
3V: Digital power of ATMega32. This is 3VDC output for external digital modules.
AGND: Analog ground of ATMega32 microcontroller. Can be used for external analog
circuits.
VBAT: Dedicated to connect main Li-ion battery. The power supply of GSM module has to
be a single voltage source of VBAT= 3.4V...4.5V. Li-ion battery with 650mA capacity is used
in AVR-GSM.
ADC3/PA3: ADC3 input/digital IO of ATMega32.
+5V: +5VDC output / up to 2A current source
POWERKEY: This is GSM module power on/off key. When the module is ON if you press
and hold for more than 3 seconds the module go in power down state. If the module if in
power down mode and you press and hold this key for more than 1 second the module will
go in ON mode.
ADC1/PA1: ADC1 input/digital IO of ATMega32.
AUXADC: This is general purpose analog to digital converter build-in the GSM module. The
input voltage value should be in range 0V to 2.4V. This pin value can be read with AT
command.
ADC0/PA0: ADC0 input/digital IO of ATMega32.
GPO1: This is GPO of GSM module and can be configured by AT command for outputting
high or low level voltage. All of the GPOs are initialy in low state without any setting from AT
command.
(SCK)PB7,(MISO)PB6,(MOSI)PB5,(SS)PB4: ATMega32 SPI pins.
SPI_DATA,SPI_CLK,SPI_CS,SPI_D/C: This is GSM module SPI port reserved for future use.
KBROW0: This is external keyboard input pin of GSM module.
RST: ATMega32 Reset pin. Open collector output.
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