User's Manual

HC25 Hardware Interface Overview
2.1 Key Features at a Glance
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HC25_HO_v00.220 Page 15 of 39 2007-03-20
Confidential / Preliminary
Interfaces
USB Supports a USB 2.0 Full Speed (12Mbit/s) device interface.
Wakeup Control Signal pin to wake up an inactive USB Host into an active state.
Status Signal pins to indicate network connectivity status.
Audio 1 analog interface
UICC interface Supported chip cards: SIM / UICC 3V, 1.8V
Antenna 50Ohms. External antenna can be connected via antenna connector or
antenna pad (spring contact).
Module interface 50-pin board-to-board connector
Power on/off, Reset
Power on/off Switch-on by hardware pin IGT
Switch-off by hardware pin IGT
Switch-off by AT command
Reset Orderly shutdown and reset by AT command
Emergency off by hardware pin EMERG_OFF and restart with hardware
pin IGT
Emergency off Emergency off by hardware pin EMERG_OFF
Evaluation kit
DSB DSB75 Evaluation Board designed to test and type approve Siemens cel-
lular engines and provide a sample configuration for application engineer-
ing. A special adapter is required to connect the module to the DSB75.
Feature Implementation