MMC, SD CARD, Memory Stick, SmartMedia, AND xD-Picture Card
±15-kV
ESD-PROTECTED VOLTAGE-TRANSLATION TRANSCEIVER
SCES615H – OCTOBER 2004 – REVISED JANUARY 2007
www.ti.com
Configuration 1a – Interfacing With SD or SDIO Card
(SD Mode or SD 4-Bit Mode)
Table 2. SD or SDIO Card
PIN
NO.
A1
B1
C1
D1
E1
F1
G1
A2
B2
C2
D2
E2
F2
G2
4
PIN
NAME
V
CCA
10A1
9A
9DIR
78DIR
7A
V
CCA
2A
3A
10A2
4A
6A
8A
5A
SIGNAL NAME
OR
(CONNECTION)
V
CCA
CLK.h
CMD.h
CMD-dir.h
(tie-high)
(tie-low)
V
CCA
DAT1.h
DAT2.h
CLK-f.h
DAT3.h
(tie-low)
(tie-low)
(tie-low)
Clock signal from host
Command signal connected to host
Direction control for 9A/9B connected to host
Direction control for 7A/7B and 8A/8B. Not used in this mode. Tie to V
CCA
.
I/O pin not used in this mode. Tie to GND.
A-port supply voltage. V
CCA
powers all A-port I/Os and control inputs.
Data bit 2 connected to host. Referenced to V
CCA
.
Data bit 3 connected to host. Referenced to V
CCA
.
Clock feedback to host for resynchronizing data. Used in OMAP processors. Optional on
other processors. Leave unconnected if not used.
Data bit 4 connected to host. Referenced to V
CCA
.
I/O pin not used in this mode. Tie to GND.
I/O pin not used in this mode. Tie to GND.
I/O pin not used in this mode. Tie to GND.
PIN FUNCTION
A-port supply voltage. V
CCA
powers all A-port I/Os and control inputs.
PIN
TYPE
Power
Input
I/O
Input
Input
I/O
Power
I/O
I/O
Output
I/O
I/O
I/O
I/O
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