Signal Descriptions

Table A-5 lists the signal assignments.

Table A-5 Multimedia Card interface signals

Pin

Signal

Function SD widebus

Function MCI

mode

 

 

 

 

 

 

 

1

MCIxDATA3

Data

Chip select

 

 

 

 

2

MCIxCMD

Command/response

Data in

 

 

 

 

3

GND

Ground

Ground

 

 

 

 

4

MCIVDDx

Supply voltage

Supply voltage

 

 

 

 

5

MCICLKx

Clock

Clock

 

 

 

 

6

GND

Ground

Ground

 

 

 

 

7

MCIxDATA0

Data 0

Data out

 

 

 

 

8

MCIxDATA1

Data 1

NC

 

 

 

 

9

MCIxDATA2

Data 2

NC

 

 

 

 

10 (DET A)

CARDINx

Card insertion detect

Card insertion detect

 

 

 

 

11 (DET B)

WPROTx

Write protect status

Write protect status

 

 

 

 

There are two MMC connectors.

MMC 0 is J21 on the top side of the board (replace x with 0 in Table A-5)

MMC 1 is J22 on the bottom side (replace x with 1 in Table A-5).

Insert and remove the card as follows:

Insertion For the connector on the top of the board, insert the card into the socket with the contacts face down. For the connector on the bottom of the board, insert the card into the socket with the contacts face up as viewed from the top of the board. Cards are normally labeled on the top surface with an arrow to indicate correct insertion.

Removal Remove the card by gently pressing it into the socket. It springs back and can be removed. Removing the card in this way ensures that the card detection switches within the socket operate correctly.

ARM DUI 0224I

Copyright © 2003-2010 ARM Limited. All rights reserved.

A-9

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Image 277
ARM ARM DUI 0224I manual Table A-5 lists the signal assignments