LPC47B272-MS SMSC, LPC47B272-MS Datasheet - Page 43

• Manufacturer Part Number: LPC47B272-MS
• Description: IC CTRLR SUPER I/O LPC 100-QFP
• Manufacturer: SMSC

Specifications of LPC47B272-MS

• Controller Type: I/O Controller
• Interface: LPC
• Voltage - Supply: 3.3V
• Current - Supply: 15mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1019

SC is returned if the last command that was issued was the Format command. EOT is returned if the last command was
a Read or Write.
Note: These bits are used internally only. They are not reflected in the Drive Select pins. It is the user's responsibility to
maintain correspondence between these bits and the Drive Select pins (DOR).
DATA TRANSFER COMMANDS
All of the Read Data, Write Data and Verify type commands use the same parameter bytes and return the same results
information, the only difference being the coding of bits 0-4 in the first byte.
An implied seek will be executed if the feature was enabled by the Configure command. This seek is completely
transparent to the user. The Drive Busy bit for the drive will go active in the Main Status Register during the seek portion
of the command. If the seek portion fails, it is reflected in the results status normally returned for a Read/Write Data
command. Status Register 0 (ST0) would contain the error code and C would contain the cylinder on which the seek
failed.
Read Data
A set of nine (9) bytes is required to place the FDC in the Read Data Mode. After the Read Data command has been
issued, the FDC loads the head (if it is in the unloaded state), waits the specified head settling time (defined in the
Specify command), and begins reading ID Address Marks and ID fields. When the sector address read off the diskette
SMSC LPC47B27x
Command
Execution
Result
Command
Command
Result
Command
Result
PHASE
PHASE
PHASE
PHASE
R/W
R/W
R/W
R/W
W
W
W
W
W
R
R
R
R
R
R
R
R
R
D7
D7
OW
D7
0
0
LOCK
0
D7
0
MFM
D6
D6
───── Invalid Codes ─────
D6
0
0
0
─────── ST0 ───────
──────── ST0 ────────
──────── ST1 ────────
──────── ST2 ────────
──────── C ────────
──────── H ────────
──────── R ────────
──────── N ────────
D6
D5
0
0
PERPENDICULAR MODE
D5
D5
D3
0
0
0
DATA BUS
INVALID CODES
D5
D4
0
0
DATA BUS
D4
D4
D2
0
0
1
READ ID
DATA BUS
DATA BUS
DATASHEET
LOCK
D3
LOCK
D3
D3
D1
D4
1
0
0
1
D2
- 43 -
HDS
D2
D0
D2
0
0
D3
0
0
D1
GAP
DS1
D1
D1
1
D2
1
1
0
D0
DS0
D1
WGATE
D0
0
0
Invalid Command Codes
(NoOp - FDC goes into Stand-
by State)
ST0 = 80H
0
D0
0
D0
0
0
Commands
The first correct ID
information on the
Cylinder is stored in
Data Register
Status information after
Command execution.
REMARKS
Command Codes
Command Codes
REMARKS
REMARKS
REMARKS
Rev. 04-17-07