參數(shù)資料
型號: VT8231
廠商: Electronic Theatre Controls, Inc.
元件分類: 晶體
英文描述: CRYSTAL 8.00MHZ 18PF SMD
中文描述: 南橋伏特,PC99柔順
文件頁數(shù): 24/132頁
文件大?。?/td> 1210K
代理商: VT8231
VT8231
Preliminary Revision 0.8
October 29, 1999
-18-
Pinouts
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Floppy Disk Interface
Signal Name
Pin #
I/O
Signal Description
DRVDEN0
DRVDEN1
MTR0#
MTR1#
DS0#
DS1#
DIR#
STEP#
INDEX#
HDSEL#
TRK00#
RDATA#
WDATA#
WGATE#
DSKCHG#
L17
K17
K18
J16
J17
K19
K20
J18
L20
H19
H16
H20
J19
J20
H18
OD
OD
OD
OD
OD
OD
OD
OD
I
OD
I
I
OD
OD
I
Drive Density Select 0.
Drive Density Select 1.
Motor Control 0.
Select motor on drive 0.
Motor Control 1.
Select motor on drive 1
Drive Select 0.
Select drive 0.
Drive Select 1.
Select drive 1
Direction.
Direction of head movement (0 = inward motion, 1 = outward motion)
Step.
Low pulse for each track-to-track movement of the head.
Index.
Sense to detect that the head is positioned over the beginning of a track
Head Select.
Selects the side for R/W operations (0 = side 1, 1 = side 0)
Track 0.
Sense to detect that the head is positioned over track 0.
Read Data.
Raw serial bit stream from the drive for read operatrions.
Write Data.
Encoded data to the drive for write operations.
Write Gate.
Signal to the drive to enable current flow in the write head.
Disk Change.
Sense that the drive door is open or the diskette has been changed
since the last drive selection.
Write Protect.
Sense for detection that the diskette is write protected (causes write
commands to be ignored)
WRTPRT#
H17
I
See also Parallel Port pin descriptions for optional Floppy Disk interface functionality
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