參數(shù)資料
型號: 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
文件頁數(shù): 13/78頁
文件大?。?/td> 475K
代理商: W83697UF
W83697UF
Publication Release Date: Dec.2002
Revision 1.0
- 9 -
1.2 FDC Interface, continued
SYMBOL
TRAK0#
PIN
12
I/O
IN
csu
FUNCTION
Track 0. This Schmitt-triggered input from the disk drive is active
low when the head is positioned over the outermost track. This
input pin is pulled up internally by a 1 K
resistor. The resistor
can be disabled by bit 7 of L0-CRF0 (FIPURDWN).
WP#
13
IN
csu
Write protected. This active low Schmitt input from the disk drive
indicates that the diskette is write-protected. This input pin is
pulled up internally by a 1 K
resistor. The resistor can be
disabled by bit 7 of L0-CRF0 (FIPURDWN).
RDATA#
14
IN
csu
The read data input signal from the FDD. This input pin is pulled
up internally by a 1 K
resistor. The resistor can be disabled by
bit 7 of L0-CRF0 (FIPURDWN).
Head select. This open drain output determines which disk drive
head is active.
Logic 1 = side 0
Logic 0 = side 1
Diskette change. This signal is active low at power on and
whenever the diskette is removed. This input pin is pulled up
internally by a 1 K
resistor. The resistor can be disabled by bit
7 of L0-CRF0 (FIPURDWN).
HEAD#
15
OD
24
DSKCHG#
16
IN
csu
1.3 Multi-Mode Parallel Port
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
SYMBOL
PIN
I/O
SLCT
29
IN
ts
An active high input on this pin indicates that the printer is
selected. This pin is pulled high internally. Refer to the
description of the parallel port for definition of this pin in ECP and
EPP mode.
WE2#
OD
12
WE# pin of FDC.
the WE# pin of FDC.
FUNCTION
PRINTER MODE:
EXTENSION FDD MODE: WE2#
This pin is for Extension FDD B; its function is the same as the
EXTENSION 2FDD MODE: WE2#
This pin is for Extension FDD A and B; its function is the same as
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