APPLICATION NOTE GR/GS64 General Purpose and Alternate Function I/O Reference: WI_DEV_Gx64_APN_008 Revision: 001 Date: 2006/12/15

4.4 I2C Support The GR/GS64 Wireless CPU can act as either an I2C or GPIO interface. I2C can be enabled or disabled using the AT*E2I2C AT command.

Appendix A -- I/O Pins by GR/GS64 Device Type Table 1. GR64 I/O pins GR64 Function AT*E2IO Alt function GR4x Pin Primary Sig GPIO <io>

Table 2. GS64 I/O pins GS64 Function AT*E2IO Alt function Pin Primary Sig GPIO <io> section 40 GPIO1 GPIO1 IO1 41 GPIO2 GPIO2 IO2

Alternate Function I/O Page: 13/13 APPLICATION NOTE GR/GS64 General Purpose and This document is the sole and exclusive property of WAVECOM. Not to

The information contained in this document is the proprietary information of Wavecom Inc. The contents are confidential and any disclosure to persons

Table of Contents 1 Introduction ... 4 1.1 LOGIC INTERFACE

1 Introduction The GR/GS64 family of Wireless CPUs is designed to provide a rich and flexible set of physical interfaces. These interfaces allow th

2 GPIO vs. Alternate I/O Functions Many of the GPIO pins can be configured to perform dedicated operations such as activity indication, modem contro

3 Using GPIO 3.1 Using GPIO for Control GPIO pins are configured and controlled in software using the E2IO AT command. See the GR/GS64 AT Command

3.2 Using GPIO for Monitoring The contact closure is connected to GPIO1. From Table 1 in Appendix A, the E2IO signal name for GPIO1 is IO1. Config

4 Using Alternate I/O functions The following sections describe the alternate I/O functions provided by GR/GS64 Wireless CPUs. 4.1 UART 1 modem co

4.2 Activity Indication The LED signal can display Wireless CPU activity when its alternate function is enabled. This signal has historically been