User's Manual

Table Of Contents

Cinterion

AGS2-E Hardware Interface Overview

3.9 GPIO Interface

 AGS2-E_HIO_v00.021 2014-03-20

Confidential / Preliminary

Page 26 of 40

3.9 GPIO Interface

AGS2-E offers a GPIO interface with 4 GPIO lines. The GPIO lines are shared with other inter-

faces, such as the fast shutdown functionality, the PWM functionality, jamming indicator or an-

tenna detection. All functions are controlled by dedicated AT commands.

The following table shows the configuration variants of the GPIO pads. All variants are mutually

exclusive, i.e. a pad configured as GPIO is locked for alternative use.

Each GPIO line can be configured for use as input or output.

3.10 I

C Interface

C is a serial, 8-bit oriented data transfer bus for bit rates up to 400kbps in Fast mode. It con-

sists of two lines, the serial data line I2CDAT and the serial clock line I2CCLK. The module acts

as a single master device, e.g. the clock I2CCLK is driven by the module. I2CDAT is a bi-direc-

tional line. Each device connected to the bus is software addressable by a unique 7-bit ad-

dress, and simple master/slave relationships exist at all times. The module operates as master-

transmitter or as master-receiver. The customer application transmits or receives data only on

request of the module.

3.11 Status LED

One line at the SMT application interface can be configured to drive a status LED which indi-

cates different operating modes of the module.

The STATUS indicator can be enabled/disabled by AT command.

3.12 PWR_IND Signal

The PWR_IND signal notifies the on/off state of the module.

Table 10: GPIO assignment

GPIO FST_SHTDN PWM Jamming indicator Antenna Detection

GPIO4 Yes

GPIO5 Yes

GPIO6 Yes

GPIO7 Yes Yes