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
Table 9. 8-Bit MMC
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 DATU-dir.h Direction control for 7A/7B and 8A/8B. Connected to host. Input
F1 7A DAT6.h General-purpose I/O. Referenced to V
CCA
. 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 DAT5.h General-purpose I/O. Referenced to V
CCA
. I/O
F2 8A DAT7.h General-purpose I/O. Referenced to V
CCA
. I/O
G2 5A DAT4.h General-purpose I/O. Referenced to V
CCA
. I/O
A3 4DIR DAT3-dir.h Direction control for 4A/4B Input
B3 1A DAT0.h Data bit 1 connected to host. Referenced to V
CCA
. I/O
C3 Depopulated ball
D3 56DIR DATU-dir.h Direction control for 5A/5B and 6A/6B. Referenced to V
CCA
. Input
E3 GND GND Ground
F3 12A DNU Output pin not used in this mode. Do not use. Leave unconnected. Output
G3 11A (tie-low) Input pin not used in this mode. Tie to GND. Input
A4 2DIR DAT1-dir.h Direction control for 2A/2B connected to host Input
B4 1DIR DAT0-dir.h Direction control for 1A/1B connected to host Input
C4 3DIR DAT2-dir.h Direction control for 3A/3B connected to host Input
D4 GND GND Ground
Card select from host. Active low. When CS0 = high, 1A, 2A, 3A, 4A, 1B, 2B, 3B, 4B, and
E4 CS0 CS0.h Input
9B1 are placed in Hi Z, and 10B1 is low.
F4 13A (tie-low) Input pin not used in this mode. Tie to GND. Input
G4 CS1 (tie-low) Card select signal. For proper operation, tie to GND. Input
A5 MODE1 (tie-low) Input
MODE1, MODE0 determine mode of operation (see Table 1).
Tie MODE0 to V
CCA
. Tie MODE1 to GND.
B5 MODE0 (tie-high) Input
C5 GND GND Ground
D5 4B DAT3 Data bit 4 connected to card. Referenced to V
CCB
. I/O
E5 GND GND Ground
F5 7B DAT6 Data bit 6 connected to card. Referenced to V
CCB
. I/O
G5 8B DAT7 Data bit 7 connected to card. Referenced to V
CCB
. I/O
A6 10B1 CLK Clock signal connected to card Output
B6 9B1 CMD Command signal connected to card Output
C6 2B DAT1 Data bit 2 connected to card. Referenced to V
CCB0
. I/O
D6 11B DNU Output pin not used in this mode. Leave unconnected. Output
E6 10B2 DNU Output pin not used in this mode. Leave unconnected. Output
F6 5B DAT4 Data bit 4 connected to card. Referenced to V
CCB
. I/O
G6 6B DAT5 Data bit 5 connected to card. Referenced to V
CCB
. I/O
A7 V
CCB0
V
CCB0
B-port supply voltage. V
CCB0
powers 1B, 2B, 3B, 4B, 9B1, and 10B1. Power
B7 1B DAT0 Data bit 1 connected to card. Referenced to V
CCB0
. I/O
21
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