
SMCxxxBF
CF-ATA command description
10.4.14
Word 57-58: current capacity
This field contains the product of the current cylinders, heads and sectors.
10.4.15
Word 59: multiple sector setting
●
Bits 15-9 are reserved and must be set to ‘0’.
●
Bit 8 is set to ‘1’, to indicate that the multiple sector setting is valid.
●
Bits 7-0 are the current setting for the number of sectors to be transferred for every
interrupt, on Read/Write Multiple commands; the only values returned are ‘00h’ or
‘01h’.
10.4.16
Word 60-61: total sectors addressable in LBA mode
This field contains the number of sectors addressable for the card in LBA mode only.
10.4.17
Word 63: multi-word DMA transfer
Bits 15 through 8 of word 63 of the identify device parameter information identifies which
multi-word DMA mode that has been selected by host.Each bit of Word 0 is significant. Only
one of these bits can be set to ‘1’ by the CompactFlash storage card to indicate the multi-
word DMA mode which is currently selected:
●
Bits 15 to 11 are reserved
●
Bit 10: when set to ‘1’, it indicates that multi-word DMA mode 1 has been selected
●
Bit 9: when set to ‘1’, it indicates that multi-word DMA mode 1 has been selected
●
Bit 8: when set to ‘1’, it indicates that multi-word DMA mode 0 has been selected.
Bits 7 to 0 define the multi-word DMA data transfer supported field. Any number of bits may
be set to one in this field by the CompactFlash storage card to indicate which multi-word
DMA mode is supported:
●
Bit 7 to 3 are reserved
●
Bit 2: when set to ‘1’, it indicates that the CompactFlash storage card supports multi-
word DMA modes 2, 1 and 0
●
Bit 1: when set to ‘1’, it indicates that the CompactFlash storage card supports multi-
word DMA modes 1 and 0
●
Bit 0: when set to ‘1’, it indicates that the CompactFlash storage card supports multi-
word DMA mode 0.
Note:
1
Selection of multi-word DMA modes 3 and above are specific to CompactFlash, and are
reported in word 163.
10.4.18
Word 64: advanced PIO transfer modes supported
This field is bit significant. Any number of bits may be set to ‘1’ in this field by the
CompactFlash memory card to indicate the advanced PIO modes it is capable of
supporting.
●
Bits 7-2 are reserved for future advanced PIO modes
●
Bit 1 is set to ‘1’, indicates that the CompactFlash memory card supports PIO mode 4
●
Bit 0 is set to ‘1’ to indicate that the CompactFlash memory card supports PIO mode 3.
Note:
Support for PIO modes 5 and above are specific to CompactFlash are reported in word 163