FDC37B727-NS Standard Microsystems (SMSC), FDC37B727-NS Datasheet - Page 17

• Manufacturer Part Number: FDC37B727-NS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37B727-NS

• Pin Count: 128
• 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" 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.
Function)
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.
(See also Force Write Protect
PENDING
INT
7
0
DRQ
6
0
STEP
F/F
5
0
17
TRK0 nHDSEL
N/A
4
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
N/A
WP
1
nDIR
0
1