Datasheet

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SN74AVCA406
MMC, SD CARD, Memory Stick, SmartMedia, AND xD-Picture Card
± 15-kV ESD-PROTECTED VOLTAGE-TRANSLATION TRANSCEIVER
SCES615H – OCTOBER 2004 – REVISED JANUARY 2007
Configuration 2 - Interfacing With SD/SDIO Card and Using GPIOs for Level Shifting
Table 8. SD/SDIO Card Using GPIOs for Level Shifting
SIGNAL NAME
PIN PIN PIN
OR PIN FUNCTION
NO. NAME TYPE
(CONNECTION)
A1 V
CCA
V
CCA
A-port supply voltage. V
CCA
powers all A-port I/Os and control inputs. Power
B1 10A1 CLK.h Clock signal from host Input
C1 9A CMD.h Command signal connected to host I/O
D1 9DIR CMD-dir.h Direction control for 9A/9B connected to host Input
E1 78DIR I/O23-dir.h Direction control for 7A/7B and 8A/8B. Connected to host. Tie to V
CCA
if unused. Input
F1 7A I/O2.h General-purpose I/O. Referenced to V
CCA
. Tie to V
CCA
or GND if unused. I/O
G1 V
CCA
V
CCA
A-port supply voltage. V
CCA
powers all A-port I/Os and control inputs. Power
A2 2A DAT1.h Data bit 2 connected to host. Referenced to V
CCA
. I/O
B2 3A DAT2.h Data bit 3 connected to host. Referenced to V
CCA
. I/O
Clock feedback to host for resynchronizing data. Used in OMAP processors. Optional on
C2 10A2 CLK-f.h Output
other processors. Leave unconnected if not used.
D2 4A DAT3.h Data bit 4 connected to host. Referenced to V
CCA
. I/O
E2 6A I/O1.h General-purpose I/O. Referenced to V
CCA
. Tie to V
CCA
or GND if unused. I/O
F2 8A I/O3.h General-purpose I/O. Referenced to V
CCA
. Tie to V
CCA
or GND if unused. I/O
G2 5A I/O0.h General-purpose I/O. Referenced to V
CCA
. Tie to V
CCA
or GND if unused. I/O
17
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