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參數(shù)資料
型號(hào): W83626D
廠商: WINBOND ELECTRONICS CORP
英文描述: LPC-to-ISA Bridge
中文描述: 線性預(yù)測(cè)到的ISA橋
文件頁(yè)數(shù): 11/34頁(yè)
文件大小: 343K
代理商: W83626D
LPC TO ISA BRIDGE SET
W83626F/W83626D
PRELIMINARY
Publication Release Date: Feb 2000
- 9 - Revision 0.50
Clock Buffer and Generator
SYMBOL
14.318M
14MOUT 1
14MOUT 2
24.576M
25.000M
PIN
26
27
28
29
I/O
INt
FUNCTION
Main 14.318 MHz Clock Input.
OUT12t 14.318 MHz Buffer Output 1.
OUT12t 14.318 MHz Buffer Output 2.
OUT12t This pin is weak pull-up during 3 V
DD
ramp-up period. The default
setting is 24.576 MHz and selected 25.000 MHz by external
pull-down with 4.7K ohm (recommended) during power ramp-up
period.
24.576 MHz Clock Output for Audio Codec or selected 25.000
MHz Clock Output for LAN on board solution.
Power Signals
SYMBOL
VCC5
VCC3
GND
AVCC3
AGND
Power-on strapping Signals
SYMBOL
80PCS#/KBEN#
PIN
I/O
PWR
PWR
PWR
PWR
PWR
FUNCTION
5, 45, 55, 70, 85, 105, 120,
20
15, 50, 60, 80, 95, 110, 125
25
30
Digital 5V Supply.
Digital 3.3V Supply.
Digital Ground.
Analog 3.3V Supply.
Analog Ground.
PIN
36
I/O
FUNCTION
I/OD12t
Power-on strapping with
pulled-down register will enable
K/B and mouse functions. When it
is set, pin 38 , 39 and 40 will do
IRQ1, KBCS# and MCCS# signals.
If there is a boot-ROM (BIOS) ,the
signal must power-on with a weak
pulled-high register.
Power-on strapping with
pulled-down register will enable
RTC functions. When it is set, pin
64 and 65 will do IRQ8 and RTCCS#
signals.
Set this function will change the
port that is used to access
configuration-registers . Default
setting is 4Eh ,but by power-on
strapping with a pulled-down
register change to 2Eh.
ROMCS#
37
I/OD12t
MASTER/RTCEN#
123
INt
DACK6#/HEFRAS
128
I/OD24t
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