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Bit 11: IORDY Supported
If bit 11 is set to 1 then this CompactFlash Storage Card supports IORDY operation.
If bit 11 is set to 0 then this CompactFlash Storage Card may support IORDY operation.
Bit 10: IORDY may be disabled
Bit 10 shall be set to 0, indicating that IORDY may not be disabled.
Bit 9 LBA support: CompactFlash Memory Cards support LBA mode addressing.
Bit 8 DMA Support: Read/Write DMA commands are supported.
10.6.11 Word 51: PIO Data Transfer Cycle Timing Mode
This field defines the mode for PIO data transfer. For backward compatibility with BIOSs written before Word 64
was defined for advanced modes, a device reports in Word 51, the highest original PIO mode it can support (PIO
mode 0, 1 or 2). Bits 15-8: are set to 02H.
10.6.12 Word 53: Translation Parameter Valid
Bit 0: is set to ‘ 1 ’ to indicate that Words 54 to 58 are valid
Bit 1: is set to ‘1’ to indicate that Words 64 to 70 are valid
Bit 2 shall be set to 1 indicating that word 88 is valid and reflects the supported True IDE UDMA
10.6.13 Word 54-56: Current Number of Cylinders, Heads, Sectors/Track
These fields contain the current number of user addressable Cylinders, Heads, and Sectors/Track in the current
translation mode.
10.6.14 Word 57-58: Current Capacity
This field contains the product of the current cylinders, heads and sectors.
?
10.6.15 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’.
10.6.16 Word 60-61: Total Sectors Addressable in LBA Mode
This field contains the number of sectors addressable for the Card in LBA mode only.
10.6.17 Word 63: Multi-Word DMA transfer
Bits 15 through 8 of word 63 of the Identify Device parameter information is defined as the Multiword DMA mode
selected field. If this field is supported, bit 1 of word 53 shall be set to one. This field is bit significant. Only one of
bits may be set to one in this field by the CompactFlash Storage Card to indicate the multiword DMA mode which
is currently selected.
Of these bits, bits 15 through 11 are reserved. Bit 8, if set to one, indicates that Multiword DMA mode 0 has been
selected. Bit 9, if set to one, indicates that Multiword DMA mode 1 has been selected. Bit 10, if set to one,
indicates that Multiword DMA mode 2 has been selected.
Selection of Multiword DMA modes 3 and above are specific to CompactFlash are reported in word 163 as described
in Word 163.
Bits 7 through 0 of word 63 of the Identify Device parameter information is defined as the Multiword DMA data
transfer supported field. If this field is supported, bit 1 of word 53 shall be set to one. This field is bit significant.
Any number of bits may be set to one in this field by the CompactFlash Storage Card to indicate the Multiword
DMA modes it is capable of supporting.
Of these bits, bits 7 through 2 are reserved. Bit 0, if set to one, indicates that the CompactFlash Storage Card
supports Multiword DMA mode 0. Bit 1, if set to one, indicates that the CompactFlash Storage Card supports
Multiword DMA modes 1 and 0. Bit 2, if set to one, indicates that the CompactFlash Storage Card supports
Multiword DMA modes 2, 1 and 0.
Support for Multiword DMA modes 3 and above are specific to CompactFlash are reported in word 163 as described
in Word 163.
10.6.18 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.
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.20
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-320_data_sheet_CF-HxBO_Rev120.doc
Page 61 of 101
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