Siemens AC75 Specifikace Strana 18

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AC75 Hardware Interface Description
Strictly confidential / Preliminary
s
AC75_HD_V00.202 Page 18 of 120 27.04.2006
Feature Implementation
Interfaces
2 serial interfaces
ASC0:
8-wire modem interface with status and control lines,
unbalanced, asynchronous
Fixed bit rates: 300 bps to 460,800 bps
Autobauding: 1,200 bps to 460,800 bps
RTS0/CTS0 and XON/XOFF flow control.
Multiplex ability according to GSM 07.10 Multiplexer Protocol.
ASC1:
4-wire, unbalanced asynchronous interface
Fixed bit rates: 300 bps to 460,800 bps
RTS1/CTS1 and software XON/XOFF flow control
USB Supports a USB 2.0 Full Speed (12Mbit/s) slave interface.
I
2
C I
2
C bus for 7-bit addressing and transmission rates up to 400kbps.
Programmable with AT^SSPI command.
Alternatively, all pins of the I²C interface are configurable as SPI.
SPI Serial Peripheral Interface for transmission rates up to 6.5 Mbps.
Programmable with AT^SSPI command.
If the SPI is active the I²C interface is not available.
Audio
2 analog interfaces (2 microphone inputs and 2 headphone
outputs with microphone power supply)
1 digital interface (PCM)
SIM interface Supported SIM cards: 3V, 1.8V
Antenna
50Ohms. External antenna can be connected via antenna
connector.
Antenna diagnostic
Module interface 80-pin board-to-board connector
Power on/off, Reset
Power on/off
Switch-on by hardware pin IGT
Switch-off by AT command (AT^SMSO)
Automatic switch-off in case of critical temperature and
voltage conditions.
Reset
Orderly shutdown and reset by AT command
Emergency reset by hardware pin EMERG_RST and IGT.
Special features
Charging Supports management of rechargeable Lithium Ion and Lithium
Polymer batteries
Real time clock Timer functions via AT commands
GPIO 10 I/O pins of the application interface programmable as GPIO.
Programming is done via AT commands.
Alternatively, GPIO pin10 is configurable as pulse counter.
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