User Guide

Hot-Swap

To enable Hot-Swap of the micro SD card, the device uses an SD card connector with a pre-warning signal.

To enable card removal, the user needs to push SD-card further in to the connector first. This gives so-called

pre-warning signal to the system and ongoing write/read operation can be finished safely before card is

removed. Note that this is just a backup mechanism and does not cover all the use cases (writing/reading

large amount of data): the user should always close the SD-card before starting the card removal.

Figure 46 Pre-warning principle

TV-out interface

A TV-out connection is implemented using the application processor (D4800) Video DAC interface and an

external analogue line driver (N5650). The device engine supports the following systems using composite

video (CVBS):

• M/NTSC

• J/NTSC

• 4.43/NTSC

• M/PAL

• N/PAL

• Nc/PAL

• B/PAL

• G/PAL

• D/PAL

• H/PAL

• I/PAL

CVBS is a single video signal containing all the necessary information to reproduce a colour picture. The video

signal is filtered with ASIP R5650, and connected to AV-connector pin 3. Switch N2002 is used to connect AV

connector pin 3 to TV-out, the same pin is used also as a microphone line.

RM-313

System Module

Issue 1 COMPANY CONFIDENTIAL Page 6 –17