K6610007
Rev.5
02.14.’03
- 95 -
Table 6.19 Device Configuration Set Command Data Structure (Continued)
Word Description
255
Integrity word
bit 15 - 8 Checksum
The checksum shall be the two’s complement of the sum of all byte in words 0
through 254 and the byte consisting of bits 7:0 of word 255. Each byte shall be
added with unsigned arithmetic, and overflow shall be ignored. The sum of all
bytes is zero when the checksum is correct
bit 7 - 0 Signature Code
Bits 7:0 of this word shall contain the value A5h.
Error Outputs:
If DEVICE CONFIGURATION FREEZE LOCK is set or If any of the bit modification restrictions described
are violated, the device returns command aborted.
Registers
7 6 5 4 3 2 1 0
Cylinder High
Word Location Number
Cylinder Low
Bit Location Number bit15 - 8
Device/Head -
X -
DRV XX
Sector Number
Bit Location Number bit 7 - 0
Sector Count
XX (Vendor Unique)
Sector Count Register:
This register contains vendor unique value by the device.
Cylinder Low Register, Sector Number:
If the command was aborted because an attempt was made to modify a mode or feature that cannot
be modified with the device in its current state, these registers contain bits (15:0) set in the bit
positions that correspond to the bits in the device configuration overlay data structure words 1, 2, or 7
for each mode or feature that cannot be changed. If not, the value is 00h.
Cylinder High Register:
If the command was aborted because an attempt was made to modify a bit that cannot be modified
with the device in its current state, this register contains the offset of the word that cannot be changed.
If not, the value is 00h.
