SMC256BFJ6E Micron Technology Inc, SMC256BFJ6E Datasheet - Page 68
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SMC256BFJ6E
Manufacturer Part Number
SMC256BFJ6E
Description
Manufacturer
Micron Technology Inc
Datasheet
1.SMC256BFJ6E.pdf
(90 pages)
Specifications of SMC256BFJ6E
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Part Number:
SMC256BFJ6E
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CF-ATA command description
10.12
10.13
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Read Sector(s) command (20h or 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 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.
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 are pending in the sector buffer.
Sector command byte sequence.
Table 62.
Read Verify Sector(s) command (40h or 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.
If an error occurs, the verify terminates at the sector where the error occurs. The command
block registers contain the cylinder, head and sector number of the sector where the error
occurred. The sector count register contains the number of sectors not yet verified.
Table 63
Cyl Low (4)
Feature (1)
Command
Sect Num
C/D/H (6)
Sect Cnt
Cyl High
Bit
(7)
(5)
(3)
(2)
defines the Read Verify Sector command byte sequence.
Read Sector(s)
1
7
LBA
6
5
1
Drive
4
Cylinder High (LBA 23-16)
Sector number (LBA 7-0)
Cylinder Low (LBA 15-8)
3
Sector count
20h or 21h
X
2
Head (LBA 27-24)
Table 62
defines the Read
1
SMCxxxBF
0
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