Siemens ET7 Series Especificações descarregar pdf (Página 14)

DSB75 Development Support Board Rev. B1 Hardware Description

Strictly confidential / Released

DSB75_hd_v08 Page 14 of 94 29.09.2005

2 General Overview

2.1 Key Features at a Glance

Table 1: Key features

Feature Implementation

GSM module interface

• Direct connection and mechanical fixing of GSM module via 80-pin

board-to-board connector and screws.

Power supply

• Laboratory PSU (9V…15V)

• Battery 3.3V…4.5V

Battery charging

• Implemented charging circuit (FET)

• Operation with plug-in charging adapter

Antenna interface

• Integrated connection between module’s Hirose connector and SMA

connector

SIM interface

• SIM card connector with front tray loading and card detection

• Supported SIM cards: 3V and 1.8V

SD Card interface

• SD card connector with front slot, card detection indication and write

protection indication

• Supply voltage: 2.9V

• Supported modes:

SD mode or

SPI mode

Audio interfaces

• Two analog audio interfaces (both with microphone supply) for

connecting a handset, headset or speakerphone.

• One digital audio interface (DAI)

I²C interface

• Host mode

• Supports 3V or 5V devices (configurable)

• Connected I²C EEPROM (128kBit) with adjustable addresses

SPI interface

(option)

• Two interfaces to be used alternatively to other interfaces

• Host mode

Serial interfaces

• Three RS-232C interfaces:

COM1 - serial interface for data communication

COM2 - serial interface for control purposes

COM3 - serial interface for debug purposes

• Max. baud rate: 460800 bps

• Autobauding at TBD bps

USB interfaces

• USB 1.1 Full Speed (12 Mbit/s) device interface at B receptacle

(default)

GPIOs

• 10 GPIOs at pins

• Switchable pull-up/down resistors (for 8 GPIO’s)

• LED signaling (for 8 GPIO’s)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 93 94

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