SMC032BFY6 datasheet(60/91 Pages) STMICROELECTRONICS

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CF-ATA command description

SMCxxxBF

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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:

Selection of Multi-Word DMA modes 3 and above are specific to CompactFlash, and are

reported in Word 163.

Support for Multi-Word DMA modes 3 and above are specific to CompactFlash are reported

in Word 163.

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