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 1e - Alternate Method of Interfacing With SD/SDIO Card
(SD Mode or SD 4-bit Mode)
Table 6. Alternate SD/SDIO Card
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 (tie-high) Direction control for 7A/7B and 8A/8B. Not used in this mode. Tie to V
CCA
. Input
F1 7A (tie-low) I/O pin not used in this mode. Tie to GND. 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 (tie-low) I/O pin not used in this mode. Tie to GND. I/O
F2 8A (tie-low) I/O pin not used in this mode. Tie to GND. I/O
G2 5A (tie-low) I/O pin not used in this mode. Tie to GND. I/O
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