MD1050-DCC M-Systems Inc., MD1050-DCC Datasheet - Page 13

• Manufacturer Part Number: MD1050-DCC
• Description: Diskonchip Ide Pro Data Sheet
• Manufacturer: M-Systems Inc.

4.2
This register contains the ATA command code that the host sends to the device. Command
execution begins immediately after this register is written. This register is write-only when BSY=0
and DRQ=0. The contents of this register and all other Command Block registers are not valid when
the device is in Sleep mode.
4.3
The Error register contains additional information about the source of an error. The content of this
register is only valid when BSY=0 and DRQ=0 in the Status register and the ERR bit is asserted.
4.4
This register is command specific, and is write-only when BSY=0 and DRQ=0.
12
Bit No.
Reserved
Bit 7
Bit 7
0
1
2
3
4
5
6
7
Bit 7
Command Register (Write)
Error Register (Read)
Feature Register (Write)
AMNF (Address Mark Not Found). Indicates that the data address mark has not been found after
finding the correct ID field.
TKONF (Track 0 Not Found). Indicates that track 0 has not been found during a RECALIBRATE
command.
ABRT (Abort). Indicates that the requested command has been aborted because the command
code or a command parameter is invalid or some other error has occurred.
MCR (Media Change Request). Not supported.
IDNF (ID-field Not Found). Requested sector ID-field Not Found.
MC (Media Changed). Not supported.
UNC (Uncorrected). Non-correctable data error encountered.
Reserved.
Bit 6
UNC
Bit 6
Bit 6
Bit 5
Bit 5
Bit 5
MC
DiskOnChip IDE Pro Data Sheet, Rev. 1.5
IDNF
Command Specific
Bit 4
Bit 4
Bit 4
Command Code
Description
MCR
Bit 3
Bit 3
Bit 3
ABRT
Bit 2
Bit 2
Bit 2
TKONF
Bit 1
Bit 1
Bit 1
91-SR-012-01-8L
AMNF
Bit 0
Bit 0
Bit 0