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10.6.25 Word 88: True IDE Ultra DMA Modes Supported and Selected
Word 88 identifies the Ultra DMA transfer modes supported by the device and indicates the mode that is currently
selected. Only one DMA mode shall be selected at any given time. If an Ultra DMA mode is selected, then no
Multiword DMA mode shall be selected. If a Multiword DMA mode is selected, then no Ultra DMA mode shall be
selected. Support of this word is mandatory if Ultra DMA is supported. Word 88 shall return a value of 0 if the
device is not in True IDE mode or if it does not support UDMA in True IDE Mode.
Bit 15:
Bit 14: 1
Bit 13: 1
Bit 12: 1
Bit 11: 1
Bit 10: 1
Bit 9: 1
Bit 8: 1
Bit 7:
Bit 6: 1
Bit 5: 1
Bit 4: 1
Bit 3: 1
Bit 2: 1
Bit 1: 1
Bit 0: 1
Reserved
= Ultra DMA mode 6 is selected 0 = Ultra DMA mode 6 is not selected
= Ultra DMA mode 5 is selected 0 = Ultra DMA mode 5 is not selected
= Ultra DMA mode 4 is selected 0 = Ultra DMA mode 4 is not selected
= Ultra DMA mode 3 is selected 0 = Ultra DMA mode 3 is not selected
= Ultra DMA mode 2 is selected 0 = Ultra DMA mode 2 is not selected
= Ultra DMA mode 1 is selected 0 = Ultra DMA mode 1 is not selected
= Ultra DMA mode 0 is selected 0 = Ultra DMA mode 0 is not selected
Reserved
= Ultra DMA mode 6 and below are supported. Bits 0-5 shall be set to 1.
= Ultra DMA mode 5 and below are supported. Bits 0-4 shall be set to 1.
= Ultra DMA mode 4 and below are supported. Bits 0-3 shall be set to 1.
= Ultra DMA mode 3 and below are supported, Bits 0-2 shall be set to 1.
= Ultra DMA mode 2 and below are supported. Bits 0-1 shall be set to 1.
= Ultra DMA mode 1 and below are supported. Bit 0 shall be set to 1.
= Ultra DMA mode 0 is supported
10.6.26 Word 160: Power Requirement Description
This word is required for CompactFlash Storage Cards that support power mode 1.
Bit 15: VLD
If set to 1, indicates that this word contains a valid power requirement description.
If set to 0, indicates that this word does not contain a power requirement description.
Bit 14: RSV
This bit is reserved and shall be 0.
Bit 13: -XP
If set to 1, indicates that the CompactFlash Storage Card does not have Power Level 1 commands.
If set to 0, indicates that the CompactFlash Storage Card has Power Level 1 commands
Bit 12: -XE
If set to 1, indicates that Power Level 1 commands are disabled.
If set to 0, indicates that Power Level 1 commands are enabled.
Bit 0-11: Maximum current
This field contains the CompactFlash Storage Card’s maximum current in mA.
10.6.27 Word 163: Advanced True IDE Timing mode capabilities and settings
This word describes the capabilities and current settings for CFA defined advanced timing modes
using the True IDE interface.
Notice! The use of True IDE PIO Modes 5 and above or of Multiword DMA Modes 3 and
above impose significant restrictions on the implementation of the host as indicated in
section 5.3 : Additional Requirements for CF Advanced Timing Modes.
There are four separate fields defined that describe support and selection of Advanced PIO
timing modes and Advanced Multiword DMA timing modes. The older modes are reported in
words 63 and 64.
Bits 2-0: Advanced True IDE PIO Mode Support
Indicates the maximum True IDE PIO mode supported by the card.
0
1
2
3-7
Specified in word 64
PIO Mode 5
PIO Mode 6
Reserved
Bits 5-3: Advanced True IDE Multiword DMA Mode Support
Indicates the maximum True IDE Multiword DMA mode supported by the card.
0
1
Specified in word 63
Multiword DMA Mode 3
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 64 of 101
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