SN74AVCA406E_08 Datasheet, PDF (3/20 Pages) Texas Instruments – MMC AND SD CARD VOLTAGE-TRANSLATION TRANSCEIVER

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SN74AVCA406E
MMC AND SD CARD VOLTAGE-TRANSLATION TRANSCEIVER
SCES659C – OCTOBER 2007 – REVISED MARCH 2008
ZQS
BALL NO.
A1
A2
A3
A4, C2
A5
B1
B2
B3
B4
B5
C1
C3
C4
C5
D1
D2
D3
D4
D5
E1
E2
E3
E4
E5
ZXY
BALL NO.
B4
B5
C5
–
C5
A4
–
A5
D5
D4
A3
B3
C3
D3
B2
B1
–
C2
D2
A2
A1
C1
–
D1
PIN DESCRIPTION
NAME
FUNCTION
DAT2A
CMD-dir
DAT0-dir
RSV
DAT2B
DAT3A
–
V_CCA
V_CCB
DAT3B
CLKA
GND
GND
CLKB
DAT0A
CMDA
CD
CMDB
DAT0B
DAT1A
CLK-f
DAT123-dir
WP
DAT1B
Data bit 3 connected to host. Referenced to V_CCA.
Direction control for command bit (CMDA/CMDB)
Direction control for DAT0A/DAT0B
Reserved (for possible future functionality). Leave unconnected.
Data bit 3 connected to memory card. Includes a 70-kΩ pullup resistor to V_CCB.
Data bit 4 connected to host. Referenced to V_CCA.
Depopulated ball
A-port supply voltage. V_CCA powers all A-port I/Os and control inputs.
B-port supply voltage. V_CCB powers all B-port I/Os.
Data bit 4 connected to memory card. Includes a 470-kΩ pulldown resistor to V_CCB.
Clock signal connected to host. Referenced to V_CCA.
Ground
Ground
Clock signal connected to memory card. Referenced to V_CCB.
Data bit 1 connected to host. Referenced to V_CCA.
Command bit connected to host. Referenced to V_CCA.
Connected to card detect on the mechanical connector.
CD has an internal 100-kΩ pullup resistor to V_CCA.
Command bit connected to memory card. Includes a 15-kΩ pullup resistor to V_CCB.
Data bit 1 connected to memory card. Includes a 70-kΩ pullup resistor to V_CCB.
Data bit 2 connected to host. Referenced to V_CCA.
Clock feedback to host for resynchronizing data. Used in OMAP processors. Leave
unconnected if not used.
Direction control for DAT1A/B, DAT2A/B, and DAT3A/B
Connected to write protect on the mechanical connector.
WP has an internal 100-kΩ pullup resistor to V_CCA
Data bit 2 connected to memory card. Includes a 70-kΩ pullup resistor to V_CCB.
TYPE
I/O
Input
Input
I/O
I/O
Power
Power
I/O
Input
Output
I/O
I/O
Output
I/O
I/O
I/O
Output
Input
Output
I/O
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