Table of Contents
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Interfaces
•
VBAT power supply
•
Digital section running under 2.8 Volts
•
3V/1V8 SIM interface
•
Power supplies
•
Serial link (UART)
•
Analog audio
•
ADC
•
Serial bus SPI for debug trace
•
PWM0,1 and PWM2 for buzzer output
•
GPIOs
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ON/~OFF
•
TX burst indicator
•
Module ready indicator
•
Reset
Firmware
•
Drives the WISMO228 via an AT command interface over a serial port
•
Full GSM/GPRS Operating System stack
•
Real Time Clock with calendar
Connection Interfaces
The WISMO228 has a 46‐pin castellation form factor which provides:
•
One ANT pin for RF in/out
•
Other pins for baseband signals
WA_DEV_W228_PTS_002
Rev 001
Product Technical Specification &
Customer Design Guidelines
Page 20 of 108
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