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4.5 ATA Commands
C156-E205-01EN 4-31
Table 4.27 Device parameter information (5/6)
Word Value Bits Description
87 4000h Command set supported and whether the function is enabled or
disabled
(A value of less than 1 indicates that the command is supported
and enabled.)
15 0b
14 1b
13-0 Reserved
88 0007h 15-13 Reserved (0b)
(Default value) 12 Ultra DMA transfer mode 4 is selected
11 Ultra DMA transfer mode 3 is selected
10 Ultra DMA transfer mode 2 is selected
9 Ultra DMA transfer mode 1 is selected
8 Ultra DMA transfer mode 0 is selected
7-5 Reserved (0b)
4 Ultra DMA transfer modes 4 or under are supported (0b)
3 Ultra DMA transfer modes 3 or under are supported (0b)
2 Ultra DMA transfer modes 2 or under are supported (1b)
1 Ultra DMA transfer modes 1 or under are supported (1b)
0 Ultra DMA transfer modes 0 is supported (1b)
89-92 0000h Reserved
93 xxxxh 15 0b
14 1b
13 0b
- for device 0
12-8 0b
70b
6 1b (Responds when device 1 is selected)
5 If DASP- is detected: 1b If not: 0b
4 If PDIAG- is detected: 1b If not: 0b
3 If diagnosis ends normally: 1b If an error occurred: 0b
2-1 11b
01b