D

E

A

1

2

3

4

B

C

3

TXS0206A

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SCES833B – NOVEMBER 2011 – REVISED APRIL 2016

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5 Pin Configuration and Functions

YFP Package

20–Pin DSBGA

Top View

Pin Assignments

1

2

3

4

A

DAT2A

VCCA

WP

DAT2B

B

DAT3A

CD

VCCB

DAT3B

C

CMDA

GND

GND

CMDB

D

DAT0A

CLKA

CLKB

DAT0B

E

DAT1A

CLK-f

EN

DAT1B

Pin Functions

PIN

TYPE

DESCRIPTION

NO.

NAME

A1

DAT2A

I/O

Data bit 2 connected to host. Referenced to VCCA. Includes a 40-kΩ pullup resistor to VCCA.

A2

VCCA

Pwr

A-port supply voltage. VCCA powers all A-port I/Os and control inputs.

A3

WP

O

Connected to write protect on the mechanical connector. The WP pin has an internal 100-k

Ω (± 30%)

pullup resistor to VCCA. Leave unconnected if not used.

A4

DAT2B

I/O

Data bit 2 connected to memory card. Referenced to VCCB. Includes a 40-kΩ pullup resistor to VCCB.

B1

DAT3A

I/O

Data bit 3 connected to host. Referenced to VCCA. Includes a 40-kΩ pullup resistor to VCCA.

B2

CD

O

Connected to card detect on the mechanical connector. The CD pin has an internal 100-k

Ω (± 30%)

pullup resistor to VCCA. Leave unconnected if not used.

B3

VCCB

Pwr

B-port supply voltage. VCCB powers all B-port I/Os.

B4

DAT3B

I/O

Data bit 3 connected to memory card. Referenced to VCCB. Includes a 40-kΩ pullup resistor to VCCB.

C1

CMDA

I/O

Command bit connected to host. Referenced to VCCA. Includes a 40-kΩ pullup resistor to VCCA.

C2

GND

—

Ground

C3

GND

—

Ground

C4

CMDB

I/O

Command bit connected to memory card. Referenced to VCCB. Includes a 40-kΩ pullup resistor to VCCB.

D1

DAT0A

I/O

Data bit 0 connected to host. Referenced to VCCA. Includes a 40-kΩ pullup resistor to VCCA.

D2

CLKA

I

Clock signal connected to host. Referenced to VCCA.

D3

CLKB

O

Clock signal connected to memory card. Referenced to VCCB.

D4

DAT0B

I/O

Data bit 0 connected to memory card. Referenced to VCCB. Includes a 40-kΩ pullup resistor to VCCB.

E1

DAT1A

I/O

Data bit 1 connected to host. Referenced to VCCA. Includes a 40-kΩ pullup resistor to VCCA.

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 VCCA.

E4

DAT1B

I/O

Data bit 1 connected to memory card. Referenced to VCCB. Includes a 40-kΩ pullup resistor to VCCB.