Datasheet

TXS0206
www.ti.com SCES697C –AUGUST 2009–REVISED JANUARY 2010
TERMINAL FUNCTIONS
TERMINAL
TYPE DESCRIPTION
NO. NAME
A1 DAT2A I/O Data bit 2 connected to host. Referenced to V
CCA
. Includes a 40-kΩ pullup resistor to V
CCA.
A2 V
CCA
Pwr A-port supply voltage. V
CCA
powers all A-port I/Os and control inputs.
Connected to write protect on the mechanical connector. The WP pin has an internal 100-kΩ pullup
A3 WP O
resistor to V
CCA
.
A4 DAT2B I/O Data bit 2 connected to memory card. Referenced to V
CCB
. Includes a 40-kΩ pullup resistor to V
CCB
.
B1 DAT3A I/O Data bit 3 connected to host. Referenced to V
CCA
. Includes a 40-kΩ pullup resistor to V
CCA
.
Connected to card detect on the mechanical connector. The CD pin has an internal 100-kΩ pullup resistor
B2 CD O
to V
CCA
.
B3 V
CCB
Pwr B-port supply voltage. V
CCB
powers all B-port I/Os.
B4 DAT3B I/O Data bit 3 connected to memory card. Referenced to V
CCB
. Includes a 40-kΩ pullup resistor to V
CCB
.
C1 CMDA I/O Command bit connected to host. Referenced to V
CCA
. Includes a 40-kΩ pullup resistor to V
CCA
.
C2, C3 GND Ground
C4 CMDB I/O Command bit connected to memory card. Referenced to V
CCB
. Includes a 40-kΩ pullup resistor to V
CCB
.
D1 DAT0A I/O Data bit 0 connected to host. Referenced to V
CCA
. Includes a 40-kΩ pullup resistor to V
CCA
.
D2 CLKA I Clock signal connected to host. Referenced to V
CCA
.
D3 CLKB O Clock signal connected to memory card. Referenced to V
CCB
.
D4 DAT0B I/O Data bit 0 connected to memory card. Referenced to V
CCB
. Includes a 40-kΩ pullup resistor to V
CCB
.
E1 DAT1A I/O Data bit 1 connected to host. Referenced to V
CCA
. Includes a 40-kΩ pullup resistor to V
CCA
.
E2 CLK-f O Clock feedback to host for resynchronizing data to a processor. Leave unconnected if not used.
E3 EN I Enable/disable control. Pull EN low to place all outputs in Hi-Z state. Referenced to V
CCA
.
E4 DAT1B I/O Data bit 1 connected to memory card. Referenced to V
CCB
. Includes a 40-kΩ pullup resistor to V
CCB
.
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