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SMC032BFY6 Datasheet(PDF) 55 Page - STMicroelectronics

Part # SMC032BFY6
Description  32MByte, 64MByte, 128MByte, 256MByte, 512MByte, 1GByte, 2GByte, and 4GByte 3.3/5V Supply CompactFlash??Card
PDF  91 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SMC032BFY6 Datasheet(HTML) 55 Page - STMicroelectronics

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SMCxxxBF
CF-ATA command description
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10
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 400ns.
●
Class 2:Upon receipt of a Class 2 command, the Card sets BSY within 400ns, sets up
the sector buffer for a write operation, sets DRQ within 700µs, and clears BSY within
400ns of setting DRQ.
●
Class 3:Upon receipt of a Class 3 command, the Card sets BSY within 400ns, sets up
the sector buffer for a write operation, sets DRQ within 20ms (assuming no re-
assignments), and clears BSY within 400ns of setting DRQ.
For reasons of backward compatibility some commands are implemented as ‘no operation’
NOP.
Table 48 summarizes the CF-ATA command set with the paragraphs that follow describing
the individual commands and the task file for each.
Table 48.
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 DMA
C8
Y
Y
Y
Y
Y
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



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