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XT65/XT75 Hardware Interface Overview

2.1 Key Features at a Glance

XT65_XT75_HO_v00.130 Page 16 of 58 2006-10-12

Confidential / Preliminary

SIM Application Toolkit SAT Release 99

TCP/IP stack Access by AT commands

IP addresses IP version 4

Remote SIM Access XT65/XT75 supports Remote SIM Access. RSA enables XT65/XT75 to use a

remote SIM card via its serial interface and an external application, in addition to

the SIM card locally attached to the dedicated lines of the application interface.

The connection between the external application and the remote SIM card can be

a Bluetooth wireless link or a serial link.

The necessary protocols and procedures are implemented according to the “SIM

Access Profile Interoperability Specification of the Bluetooth Special Interest

Group”.

Firmware update Generic update from host application over ASC0 or USB. Over-the-air (OTA)

firmware update is possible via SPI interface.

Interfaces

Serial interface (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.

USB Supports a USB 2.0 Full Speed (12Mbit/s) slave interface.

C bus for 7-bit addressing and transmission rates up to 400kbps. Programma-

ble 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 micro-

phone power supply)

1 digital interface (PCM)

SIM interface Supported SIM cards: 3V, 1.8V

Antenna • 50Ohms. External GSM antenna can be connected via antenna connector.

• 50Ohms. External GPS antenna can be connected via antenna connector.

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.

Feature Implementation

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