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C156-E142-02EN 4 - 53
4.6.6 MODE SENSE command
Table 4.70 MODE SENSE command
Bit
Byte
76543210
0 Operation Code (5Ah)
1 Logical Unit Number Reserved
2 PC Page Code
3-6 Reserved
7-8 Allocation Length
9-11 Reserved
The MODE SENSE command transfers the mode parameter list to the host. The mode parameter
list is shown in Table 4.71.
PC (Page Control) specifies the type of the page descriptor to be sent.
Table 4.71 Page Control field
Bit 7 Bit 6 Parameter type
0 0 Current value
0 1 Changeable value
1 0 Default value
1 1 Saved value
Page Code specifies the page descriptor to be transferred. If Page Code is X'3F', all page
descriptors are transferred. For page descriptors supported, see Table 4.74.
Mode pages are transferred in ascending page code order except for Drive Operation Mode
Page (00h). Drive Operation Mode Page is transferred after all other mode pages.
Table 4.72 Mode parameter list
Bit
Byte
76543210
0-7 Mode parameter Header
0-n Page Descriptor (s)