THNCF008MBA Datasheet, PDF(25/48 Page) Toshiba Semiconductor – The THNCFxxxMBA/BAI series CompactFlash card is a flash technology based with ATA interface flash memory card.

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THNCF008MBA Datasheet, PDF (25/48 Pages) Toshiba Semiconductor – The THNCFxxxMBA/BAI series CompactFlash card is a flash technology based with ATA interface flash memory card.

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Preliminary

THNCFxxxMBA/BAI Series

9. Status register

This register is read only register, and it indicates the card status of command execution. When this register

is read in configured I/O card mode (INDEX=1,2,3) and level interrupt mode, âIREQ is negated.

bit7

bit6

bit5

bit4

bit3

bit2

bit1

BSY

DRDY

DWF

DSC

DRQ

CORR

IDX

bit0

ERR

bit

Name

7

BSY (BuSY)

6

DRDY (Drive ReaDY)

5

DWF (Drive Write Fault)

4

DSC (Drive Seek Complete)

3

DRQ (Data ReQuest)

2

CORR (CORRected data)

1

IDX (InDeX)

0

ERR (ERRor)

Function

This bit is set when the card internal operation is executing. When this bit is set to

â1â, other bits in this register are invalid.

If this bit and DSC bit are set to â1â, the card is capable of receiving the read or

write or seek requests. If this bit is set to â0â, the card prohibits these requests.

This bit is set if this card indicates the write fault status.

This bit is set when the drive seeks complete.

This bit is set when the information can be transferred between the host and Data

register. This bit is cleared when the card receives the other command.

This bit is set when a correctable data error has been occurred and the data has

been corrected.

This bit is always set to â0â.

This bit is set when the previous command has ended in some type of error. The

error information is set in the error register. This bit is cleared by the next

command.

10. Alternate status register

This register is the same as Status register in physically, so the bit assignment refers to previous item of

Status register. But this register is different from Status register that âIREQ is not negated when data read.

11. Command register

This register is write only register, and it is used for writing the command to execute the requested operation.

The command code is written in the command register, after the parameter is written in the Task File when

the card is in Ready state.

2002-10-20 25/48

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