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SMC032AF 데이터시트(PDF) 51 Page - Numonyx B.V

부품명	SMC032AF

상세설명	32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash??card

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CF-ATA command description

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9

CF-ATA command description

This section defines the software requirements and the format of the commands the host

sends to the card. Commands are issued to the card by loading the required registers in the

command block with the supplied parameters, and then writing the command code to the

command register. There are three classes of command acceptance, all dependent on the

host not issuing commands unless the card is not busy (BSY is ‘0’).

●

Class 1. Upon receipt of a class 1 command, the card sets BSY within 400 ns.

●

Class 2. Upon receipt of a class 2 command, the card sets BSY within 400 ns, sets up

the sector buffer for a write operation, sets DRQ within 700 µs, and clears BSY within

400 ns of setting DRQ.

●

Class 3. Upon receipt of a class 3 command, the card sets BSY within 400 ns, sets up

the sector buffer for a write operation, sets DRQ within 20 ms (assuming no re-

assignments), and clears BSY within 400 ns of setting DRQ.

For reasons of backward compatibility some commands are implemented as ‘no operation’

NOP.

Table 46 summarizes the CF-ATA command set with the paragraphs that follow describing

the individual commands and the task file for each.

Table 46.

CF-ATA command set(1)

Class

Command

Code

FR

SC

SN

CY

DH

LBA

1

Check Power mode

E5h or 98h

D

1

Execute Drive Diagnostic

90h

YD

1

Erase Sector(s)

C0h

Y

Y

Y

Y

Y

1

Identify Drive

ECh

D

1

Idle

E3h or 97h

Y

D

1

Idle immediate

E1h or 95h

D

1

Initialize Drive Parameters

91h

Y

Y

1

NOP

00h

D

1

Read Buffer

E4h

D

1

Read Multiple

C4h

Y

Y

Y

Y

Y

1

Read Sector(s)

20h or 21h

Y

Y

Y

Y

Y

1

Read Verify Sector(s)

40h or 41h

Y

Y

Y

Y

Y

1

Recalibrate

1Xh

D

1

Request Sense

03h

D

1Seek

7Xh

Y

Y

Y

Y

1

Set Features

EFh

Y

D

1

Set Multiple mode

C6h

Y

D

1

Set Sleep mode

E6h or 99h

D

1

Standby

E2h or 96h

D

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