SanDisk CompactFlash 5000 Manuál Strana 66
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Hodnocené. / 5. Na základě hodnocení zákazníků
SanDisk Industrial Grade CompactFlash 5000 Product Manual
© 2007 SanDisk® Corporation 59 July 2007
5.1.12
Read Long Sector–22H, 23H
The Read Long command performs similarly to the Read Sector(s) command
except that it returns 516 bytes of data instead of 512 bytes. During a Read
Long command, the card does not check the ECC bytes to determine if there
has been a data error. Only single sector read long operations are supported.
The transfer consists of 512 bytes of data transferred in word mode followed
by 4 bytes of random data transferred in byte mode. Random data is returned
instead of ECC bytes because of the nature of the ECC system used. This
command has the same protocol as the Read Sector(s) command.
Table 54: Read Long Sector
5.1.13
Read Sector(s)–20H, 21H
This command reads from 1 to 256 sectors as specified in the Sector Count
Register. A sector count of 0 requests 256 sectors. The transfer begins at the
sector specified in the Sector Number Register. When this command is issued,
and after each sector of data (except the last one) has been read by the host,
the CompactFlash card sets BSY, puts the sector of data in the buffer, sets
DRQ, clears BSY, and generates an interrupt. The host then reads the 512
bytes of data from the buffer.
On command completion, the Command Block registers contain the cylinder,
head and sector number of the last sector read. If an error occurs, the read
terminates at the sector where the error occurred. The Command Block
registers contain the cylinder, head, and sector number of the sector where
the error occurred. The flawed data is pending in the sector buffer.
Table 55: Read Sector(s)
5.1.14
Read Verify Sector(s)–40H, 41H
This command is identical to the Read Sectors command, except that DRQ is
never set and no data is transferred to the host. When the command is
accepted, the card sets BSY.
When the requested sectors have been verified, the card clears BSY and
generates an interrupt. Upon command completion, the Command Block
- SanDisk Industrial Grade 1
- CompactFlash 5000 1
- Table of Contents 2
- List of Tables 5
- Introduction 8
- Features 9
- CompactFlash Standard 10
- PCMCIA Standard 10
- Related Documentation 10
- Functional Description 10
- Technology Independence 11
- Defect and Error Management 11
- Bad Block Management 12
- Automatic Sleep Mode 12
- Power Supply Requirements 12
- Wear Leveling 12
- Product Specifications 14
- System Power Requirements 15
- System Performance 15
- System Reliability 16
- Physical Specifications 16
- Regulatory Compliance 17
- Traceability 17
- Interface Description 18
- Electrical Description 20
- Table 10: Signal Description 21
- Electrical Specification 24
- Output Drive Characteristics 25
- Power Up/Down Timing 26
- Common Memory Read Timing 27
- Table 16 (continued) 28
- Memory Timing Diagrams 29
- I/O Read Timing Diagram 30
- True IDE Mode 32
- Card Configuration 35
- Attribute Memory Function 36
- Attribute Memory function 37
- Attribute Memory) 38
- 202h in Attribute Memory) 39
- Memory) 40
- I/O Transfer Function 41
- Configurations 43
- Memory Mapped Addressing 45
- True IDE Mode Addressing 46
- ATA Registers 46
- Read Only) 47
- Device Control Register 50
- Offset Fh) 50
- ATA Command Description 52
- Check Power Mode–98H, E5H 53
- Erase Sector(s)–C0H 54
- Format Track–50H 55
- Identify Device–ECH 55
- Idle–97H, E3H 63
- Idle Immediate–95H, E1H 63
- Read Buffer–E4H 64
- Read DMA Command–C8H, C9H 64
- Read Multiple–C4H 65
- Read Long Sector–22H, 23H 66
- Read Sector(s)–20H, 21H 66
- Recalibrate–1XH 67
- Request Sense–03H 67
- Seek–7XH 68
- Set Features–EFH 69
- Set Multiple Mode–C6H 70
- Set Sleep Mode–99H, E6H 70
- Standby–96H, E2H 71
- Standby Immediate–94H, E0H 71
- Translate Sector–87H 72
- Wear Level–F5H 72
- Write Buffer–E8H 73
- Write DMA Command–CAH, CBH 73
- Write Long Sector–32H, 33H 73
- Write Multiple Command–C5H 74
- Write Sector(s)–30H, 31H 75
- Write Verify Sector(s)–3CH 76
- Error Posting 77
- CIS Description 78
- I. Warranty Statement 95
- II. General Provisions 95
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