Preliminary
32(36)
Prepared
Document Number
Manfred Ortmann
Approved
Checked
Date
Revision
Storage
2008-05-14
PA 3.5
Mycable01
2.2.14 Secure Digital ( SD ) Memory Card Interface
At SD memory card connector X901 the signals of the SD memory card from the CPU are
connected.
The supply voltage SD_CARD_VCC for the SD memory card will be switched from GPIO
P14_5.
A logical 0 at GPIO P14_5 switches the supply voltage ON.
Following table shows the assignment of pins, signals and function.
Pin
Signal
Function
1
SD_DAT3
SD data line 3
2
SD_CMD
Command line
3
GND
Ground
4
SD_CARD_VCC
Supply voltage
5
SD_CLK
Clock
6
GND
Ground
7
SD_DAT0
SD data line 0
8
SD_DAT1
SD data line 1
9
SD_DAT2
SD data line 2
10
SD_XMCD
Card detect
11
VCC33
3.3 V Supply voltage
12
SD_WP
Write protect
Table 2-11: Pin assignment X901