THNCF008MAA Datasheet, PDF (27/52 Pages) Toshiba Semiconductor – CompactFlash Card

Preliminary version
THNCFxxxMAA Series
1.Data register: This register is a 16-bit register that has read/write ability, and it is used for transferring 1 sector
data between the card and the host. This register can be accessed in word mode and byte mode. This register
overlaps the Error or Feature register.
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
D0 to D15
2.Error register: This register is a read only register, and it is used for analyzing the error content at the card
accessing. This register is valid when the BSY bit in Status register and Alternate Status register are set to
“0”(Ready).
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
BBK
UNC
“0”
IDNF
“0”
ABRT
“0”
AMNF
bit Name
7 ^{BBK(Bad Block detected)}
6 ^{UNC(Data ECC error)}
4 ^{IDNF(ID Not Found)}
2 ^{ABRT(ABoRTed command)}
0 ^{AMNF(Address Mark Not Found)}
Function
This bit is set when a Bad Block is detected in requester ID field.
This bit is set when Uncorrectable error is occurred at reading the
card.
The requested sector ID is in error or cannot be found.
This bit is set if the command has been aborted because of the card
status condition.(Not ready, Write fault, Invalid command, etc.)
This bit is set in case of a general error.
3.Feature register: This register is write-only register, and provides information regarding features of the drive that
the host wishes to utilize.
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Feature byte
5. Sector count register: This register contains the numbers of sectors of data requested to be transferred on a
read or write operation between the host and the card. If the value of this register is zero, a count of 256
sectors is specified. In plural sector transfer, if not successfully completed, the register contains the number of
sectors, which need to be transferred in order to complete, the request.
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Sector count byte
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