SMC032BF View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

SMC032BF

32MByte, 64MByte, 128MByte, 256MByte, 512MByte, 1GByte, 2GByte, and 4GByte 3.3/5V Supply CompactFlash™ Card

STMicroelectronics 

SMCxxxBF

Electrical interface

Table 9. Signal Description (continued)

Signal Name

Dir.

Pin

–VS1, –VS2

(PC Card Memory Mode)

–VS1, –VS2

O

(PC Card I/O Mode)

–VS1, –VS2

(True IDE Mode)

–WAIT

(PC Card Memory Mode)

–WAIT

O

(PC Card I/O Mode)

IORDY

(True IDE Mode)

–WE

(PC Card Memory Mode)

–WE

I

(PC Card I/O Mode)

–WE

(True IDE Mode)

WP

(PC Card Memory Mode)

33,40

42

36

–IOIS16

(PC Card I/O Mode)

O

24

–IOCS16

(True IDE Mode)

Description

Voltage Sense Signals.–VS1 is grounded so that the CIS

can be read at 3.3 volts and –VS2 is reserved by PCMCIA

for a secondary voltage.

Same for all modes.

Same for all modes.

ST CF does not assert the WAIT (IORDY) signal

Driven by the host to strobe memory write data to the

registers.

Used for writing to the configuration registers.

Not used, should be connected to VCC by the host.

No write protect switch available. It is held Low after the

completion of the reset initialization sequence.

Used for the 16 bit Port (–IOIS16) function. Low indicates

that a 16 bit or odd Byte only operation can be performed at

the addressed port.

Asserted Low when the Card is expecting a Word data

transfer cycle.

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