SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 80

• Manufacturer Part Number: SCH3112I-NE
• Description: LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
• Manufacturer: SMSC [SMSC Corporation]

Rev 0.2 (09-28-04)
7.1.5
PERPENDICULAR MODE
PHASE
Command
INVALID CODES
PHASE
Command
Result
LOCK
PHASE
Command
Result
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
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.
R/W
W
R
R/W
W
R/W
user’s responsibility to maintain correspondence between these bits and the Drive Select pins
(DOR).
W
R
DATA BUS
D7
DATA BUS
D7
DATA BUS
D7
0
OW
LOCK
0
D6
D6
0
0
D6
D5
0
0
D5
0
D3
Invalid Codes
D5
D4
DATASHEET
0
0
D4
1
D2
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
ST0
D4
D3
LOCK
64
D3
0
D1
1
D2
D2
0
D0
D3
0
0
D1
D1
1
GAP
D2
0
1
D0
D1
D0
0
WGATE
0
0
REMARKS
Invalid Command Codes (NoOp
– FDC goes into Standby State)
ST0 = 80H
D0
0
0
REMARKS
Command Codes
REMARKS
Command Codes
SMSC SCH311X
Datasheet