SD/MMC card slot:
Pin #
Signal Name
Pin #
Signal Name
1
MCIDAT3
2
MCICMD
3
GND (VSS1)
4
VDD
5
MCICLK
6
GND (VSS2)
7
MCIDAT0
8
MCIDAT1
9
MCIDAT2
10
WP
11
-
12
-
13
CP
14
GND
15
GND
MCIDAT0-3
I/O
Memory Card Interface Data 0-4.
These are the data lines for the
SD/MMC connector. They could be both input and output for the MCU depending on the
data flow direction.
MCICMD
Output
Memory Card Interface Command.
This is a command sent form the
processor to the memory card and as such it is output from the processor.
MCICLK
Output
Memory Card Interface Clock.
This signal is output from the MCU
and synchronizes the data transfer between the memory card and the MCU.
WP
Input
Write Protect.
This signal is input for the MCU.
CP
Input
Card Present.
This signal is input for the MCU.
