User Guide

Issue 1 12/04 COMPANY CONFIDENTIAL 17

RAE-6/RA-4

6 - Baseband Description and Troubleshooting Nokia Customer Care

ARMIO

ARMIO provides 5 ARM processor controllable GPIOs by default, and 5 more are available with

different multiplexing scheme. ARMIOs also include a keyboard interface. The GPIOs consists

programmable debouncing circuit but can be accessed directly only by the ARM processor.

Both ARMIOs and keyboard interface signals can wake-up OMAP1510 from deep sleep and

big sleep states.

GPIO

14 General Purpose Input/ Output External pins are multiplexed between ARM/DSP. Multiplex

logic is programmed and controlled by ARM and supports pin-by-pin configuration.

■ External interfaces

Back cover switch

A switch is used for back cover removal detection. A rib is attached to the back cover. A sensor

gives a warning to prevent data loss or corruption when writing to the MMC card.

Lid hall switch

A hall switch is used to detect the lid position. The switch is located on QWERTY flex and is

connected to COP8 controller. The magnet is in the lid.

MMC

The MMC Interface in OMAP1510 is fully compliant with the MultiMediaCard system specifica-

tion version 3.1. RAE-6/RA-4 MMC interface voltage is 3 V.

USB

The OMAP1510 USB Controller is a Full Speed Device (12 Mb/s) fully compliant with the Uni-

versal Serial Bus specification Revision 2.0. The USB Client (a mobile terminal) is connected

to the USB Host (a PC) through the system connector.

■ UI interfaces

Displays

S80 display interface

S80 display utilizes the 16-bit synchronous LCD interface of OMAP1510, and µWire for control

data.

Cover display interface

RAE-6/RA-4 has a separate small 64k colours display connected to OMAP1510 via µWire in-

terface. There is an unidirectional level shifter between OMAP and the display, so no data can

be read from the display.