SST48CF016 datasheet(12/60 Pages) SST

12 / 60 page

Data Sheet

CompactFlash Card

SST48CF008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192 / 256

S71125-03-000

9/01

375

-VS1

-VS2

(PC Card Memory Mode)

O33

Voltage Sense Signals. -VS1 is grounded so that the CompactFlash

card CIS can be read at 3.3V and -VS2 is reserved by PCMCIA for a

secondary voltage.

-VS1

-VS2

(PC Card I/O Mode)

This signal is the same for all modes.

-VS1

-VS2

(True IDE Mode)

This signal is the same for all modes.

-WAIT

(PC Card Memory Mode)

The -WAIT signal is driven low by the CompactFlash

Card to signal the host to delay completion of a memory or I/O cycle

that is in progress.

-WAIT

(PC Card I/O Mode)

This signal is the same as the PC Card Memory Mode signal.

IORDY

(True IDE Mode)

In True IDE Mode this output signal may be used as IORDY.

-WE

(PC Card Memory Mode)

This is a signal driven by the host and used for strobing memory

write data to the registers of the CompactFlash card when the card is

configured in the memory interface mode. It is also used for writing

the configuration registers.

-WE

(PC Card I/O Mode)

In PC Card I/O Mode, this signal is used for writing the configuration

registers.

-WE

(True IDE Mode)

In True IDE Mode this input signal is not used and should be con-

nected to VDD by the host.

(PC Card Memory Mode)

Write Protect

Memory Mode - The CompactFlash card does not have

a write protect switch. This signal is held low after the completion

of the reset initialization sequence.

-IOIS16

(PC Card I/O Mode)

I/O Operation - When the CompactFlash card is configured for I/O

Operation Pin 24 is used for the -I/O Selected is 16 Bit Port (-IOIS16)

function. A Low signal indicates that a 16 bit or Odd Byte only opera-

tion can be performed at the addressed port.

-IOIS16

(True IDE Mode)

In True IDE Mode this output signal is asserted low when this device

is expecting a word data transfer cycle.

T2-2.0 375

1. I = Input

0 = Output

TABLE

2-2: SIGNAL DESCRIPTION (CONTINUED) (4 OF 4)

Symbol

Type1

Name and Functions

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