SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 52

• 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)
7.1.2
RESET
COND.
Bit 0 DIRECTION
Active high status indicating the direction of head movement. A logic “1” indicates inward direction; a
logic “0” indicates outward direction.
Bit 1 nWRITE PROTECT
Active low status of the WRITE PROTECT disk interface input. A logic “0” indicates that the disk is
write protected.
Bit 2 nINDEX
Active low status of the INDEX disk interface input.
Bit 3 HEAD SELECT
Active high status of the HDSEL disk interface input. A logic “1” selects side 1 and a logic “0” selects
side 0.
Bit 4 nTRACK 0
Active low status of the TRK0 disk interface input.
Bit 5 STEP
Active high status of the STEP output disk interface output pin.
Bit 6 nDRV2
This function is not supported. This bit is always read as “1”.
Bit 7 INTERRUPT PENDING
Active high bit indicating the state of the Floppy Disk Interrupt output.
PS/2 Model 30 Mode
Bit 0 DIRECTION
Active low status indicating the direction of head movement. A logic “0” indicates inward direction; a
logic “1” indicates outward direction.
Bit 1 WRITE PROTECT
Active high status of the WRITE PROTECT disk interface input. A logic “1” indicates that the disk is
write protected.
Bit 2 INDEX
Active high status of the INDEX disk interface input.
Bit 3 HEAD SELECT
Active low status of the HDSEL disk interface input. A logic “0” selects side 1 and a logic “1” selects
side 0.
7
INT PENDING
0
6
DRQ
0
5
STEP
F/F
0
DATASHEET
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
36
4
TRK0
N/A
3
nHDSEL
1
2
INDX
N/A
1
N/A
WP
SMSC SCH311X
0
nDIR
1
Datasheet