SDCFH-1024-388 SanDisk, SDCFH-1024-388 Datasheet - Page 71

• Manufacturer Part Number: SDCFH-1024-388
• Description: COMPACT FLASH 1GB ULTRA II
• Manufacturer: SanDisk

Specifications of SDCFH-1024-388

• Memory Size: 1GB
• Memory Type: CompactFLASH
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2007 SanDisk Corporation
SanDisk CompactFlash Card OEM Product Manual
5.1.12
5.1.13
5.1.14
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 5-19
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.
At 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 5-20
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.
Command (7)
Command (7)
Sec Num (3)
Sec Num (3)
Cyl High (5)
Cyl High (5)
Cyl Low (4)
Cyl Low (4)
Sec Cnt (2)
Sec Cnt (2)
Feature (1)
Feature (1)
C/D/H (6)
C/D/H (6)
Bit
Bit
Read Long Sector
Read Sector(s)
7
1
7
1
LBA
LBA
6
6
5-17
5
1
5
1
Cylinder High (LBA 23-16)
Cylinder High (LBA 23-16)
Sector Number (LBA 7-0)
Sector Number (LBA 7-0)
Cylinder Low (LBA 15-8)
Cylinder Low (LBA 15-8)
Drive
Drive
Sector Count
22H or 23H
20H or 21H
4
4
X
X
X
3
3
Head (LBA 27-24)
Head (LBA 27-24)
ATA Command Description
2
2
Rev. 12.0, 02/07
1
1
0
0