FDC37C669-MS Standard Microsystems (SMSC), FDC37C669-MS Datasheet - Page 20

• Manufacturer Part Number: FDC37C669-MS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C669-MS

• Pin Count: 100
• Lead Free Status / RoHS Status: Compliant

PS/2 Model 30 Mode
BIT 0 nDIRECTION
Active low status indicating the direction of head
movement. A logic "0" indicating inward direction a logic
"1" outward.
BIT 1 WRITE PROTECT
Active high status of the WRITE PROTECT disk interface
input. A logic "1" indicating that the disk is write protected.
BIT 2 INDEX
Active high status of the INDEX disk interface input.
BIT 3 nHEAD SELECT
Active low status of the HDSEL disk interface input. A
logic "0" selects side 1 and a logic "1" selects side 0.
RESET
COND.
PENDING
INT
7
0
DRQ
6
0
STEP
F/F
5
0
TRK0 nHDSEL
N/A
4
20
BIT 4 TRACK 0
Active high status of the TRK0 disk interface input.
BIT 5 STEP
Active high status of the latched STEP disk interface
output pin. This bit is latched with the STEP output going
active, and is cleared with a read from the DIR register, or
with a hardware or software reset.
BIT 6 DMA REQUEST
Active high status of the DRQ output pin.
BIT 7 INTERRUPT PENDING
Active high bit indicating the state of the Floppy Disk
Interrupt output.
3
1
INDX
N/A
2
WP
N/A
1
nDIR
0
1