MD1050-DCC M-Systems Inc., MD1050-DCC Datasheet - Page 42

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

5.1.23 Write Verify Sector(s) – 3Ch
This command writes from 1 to 256 sectors, as specified in the Sector Count register. A sector count
of 0 requests 256 sectors. The transfer begins at the sector specified in the Sector Number register.
When this command is accepted, DiskOnChip IDE Pro sets BSY, then sets DRQ and clears BSY,
then waits for the host to fill the sector buffer with the data to be written. No interrupt is generated
to start the first buffer fill operation. No data should be transferred by the host until BSY has been
cleared by the host.
For multiple sectors, after the first sector of data is in the buffer, BSY is set and DRQ is cleared.
After the next buffer is ready for data, BSY is cleared, DRQ is set and an interrupt is generated.
When the final sector of data is transferred, BSY is set and DRQ is cleared. It remains in this state
until the command is completed, at which time BSY is cleared and an interrupt is generated.
If an error occurs during a write of more than one sector, writing terminates at the sector where the
error occurs. The Command Block registers contain the cylinder, head and sector number of the
sector where the error occurred. The host may them read the command block to determine what
error has occurred, and in which sector.
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Sector Number
Sector Number
Cylinder High
Cylinder High
Sector Count
Sector Count
Cylinder Low
Device/Head
Cylinder Low
Command
Register
Register
Features
Status
Error
BSY
R
7
1
7
0
DRDY
Cylinder[15:8] or LBA[23:16] of the first sector/LBA to transfer
UNC
LBA
Cylinder[7:0] or LBA[15:8] of the first sector/LBA to transfer
DiskOnChip IDE Pro Data Sheet, Rev. 1.5
6
6
0
Sector[7:0] or LBA[7:0] of the first sector/LBA to transfer
MC
DF
5
1
5
0
OUTPUT
INPUT
IDNF
DSC
Sector count
D
4
4
1
3Ch
MCR
DRQ
3
H[3:0] or LBA[27:24] of the starting
3
0
CORR
ABRT
2
2
sector/LBA
TKONF
IDX
1
1
0
0
91-SR-012-01-8L
AMNF
ERR
0
0
0