Filter
Top Products
4.6 Packet Commands
C156-E205-01EN 4-55
4.6.6 MODE SENSE (6) command
Table 4.70 MODE SENSE (6) command
Bit
Byte
76543210
0 Operation Code (1Ah)
1 Reserved DBD Reserved
2 PC Page Code
3Reserved
4 Allocation Length
5-11 Reserved
The MODE SENSE (6) command transfers the mode parameter list to the host.
When the Disable Block Descriptors (DBD) is 1, the Block Descriptor is not
returned. When the DBD is 0, the Block Descriptor is returned. The Allocation
Length specifies the number of bytes of the mode parameter to be transferred.
When the Allocation Length is 0, this command is terminated normally without
transferring data.
The Page Control (PC) specifies the type of the Page to be transferred.
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 Mode Page to be transferred. If Page Code is 3Fh, all
Mode Pages are transferred. For page descriptors supported, see Table 4.46.
Mode pages are transferred in ascending page code order.
When 0 is specified for both the Page Code and the Page Control, the Mode
Parameter Header and the Block Descriptor (only when the DBD bit is 0) are
transferred.
Table 4.72 shows the mode parameter list.