參數(shù)資料
型號(hào): W83697UF
英文描述: W83697F plus 2 Extra UART (total 4 UART)
中文描述: W83697F加2額外的UART(共4 UART)的
文件頁(yè)數(shù): 12/78頁(yè)
文件大?。?/td> 475K
代理商: W83697UF
W83697UF
Publication Release Date: Dec.2002
Revision 1.0
- 8 -
1.2 FDC Interface
SYMBOL
PIN
I/O
FUNCTION
DRVDEN0
INDEX#
1
OD
24
Drive Density Select bit 0.
2
IN
csu
This Schmitt-triggered input from the disk drive is active low
when the head is positioned over the beginning of a track marked
by an index hole. This input pin is pulled up internally by a 1 K
resistor. The resistor can be disabled by bit 7 of L0-CRF0
(FIPURDWN).
MOA#
3
OD
24
Motor A On. When set to 0, this pin enables disk drive 0. This is
an open drain output.
DSB#
4
OD
24
Drive Select B. When set to 0, this pin enables disk drive B.
This is an open drain output.
DSA#
6
OD
24
Drive Select A. When set to 0, this pin enables disk drive A.
This is an open drain output.
MOB#
7
OD
24
Motor B On. When set to 0, this pin enables disk drive 1. This is
an open drain output.
DIR#
8
OD
24
Direction of the head step motor. An open drain output.
Logic 1 = outward motion
Logic 0 = inward motion
STEP#
9
OD
24
Step output pulses. This active low open drain output produces
a pulse to move the head to another track.
WD#
10
OD
24
Write data. This logic low open drain writes pre-compensation
serial data to the selected FDD. An open drain output.
WE#
11
OD
24
Write enable. An open drain output.
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