Write Multiple (C5H); Figure 139. Write Multiple Command (C5H) - Hitachi IC25N040ATCS04-0 - Travelstar 40GN 40GB UDMA/100 4200RPM 2MB 2.5" IDE Hard Drive Specifications

13.38 Write Multiple (C5h)

Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 139. Write Multiple command (C5h)

The Write Multiple command transfers one or more sectors from the host to the device. The data is then
written to the disk media.
Command execution is identical to the Write Sectors command except that an interrupt is generated for
each block as defined by the Set Multiple command instead of for each sector. The sectors are transferred
through the Data Register 16 bits at a time.
Output parameters to the device
Sector Count
Sector NumberThis indicates the sector number of the first sector to be transferred. (L = 0)
Cylinder High/Low
H
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
1 L 1 D H H H H
1 1 0 0 0 1 0 1
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
This indicates the number of continuous sectors to be transferred. If the Sector
Count of zero is specified, 256 sectors will be transferred.
In LBA mode this register contains the LBA bits 0–7. (L = 1)
This indicates the cylinder number of the first sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 8–15 (Low) and bits
16–23 (High). (L = 1)
This indicates the head number of the first sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 24–27. (L = 1)
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V V
189
7 6 5 4 3 2 1 0
- - - - - - - -
see below
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
- - - - H H H H
see below
4 3 2 1 0
DSC DRQ COR IDX ERR
V - 0 - V