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FDC37M70X Datasheet(PDF) 15 Page - List of Unclassifed Manufacturers

Part No. FDC37M70X
Description  Enhanced Super I/O Controller with Wake-Up
Download  194 Pages
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Maker  ETC [List of Unclassifed Manufacturers]
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15
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.
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.
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.
7
6
5
4
3
2
1
0
INT
PENDING
DRQ
STEP
F/F
TRK0
nHDSEL
INDX
WP
nDIR
RESET
COND.
0
0
0
N/A
1
N/A
N/A
1




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