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Part Name
Description
KBD42W11 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
Manufacturer
KBD42W11
Keyboard Controller
SMSC -> Microchip
KBD42W11 Datasheet PDF : 16 Pages
First
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APPLICATION CIRCUIT
Asynchronous
RESETB
SA2
IORB
IOWB
D0 - D7
2
X1
3
X2
4
1
39
9
6
5
8
10
RESET
T0
T1
A2
nCS
V
DD
nRD
nWR
12
13
14
15
16
17
18
19
D0
D1
D2
D3
D4
D5
D6
D7
7
V
SS
25
V
DD
27
P10 28
P11
29
P12
30
P13
31
P14
32
P15
33
P16
34
P17
21
P20 22
P21 23
P22
24
P23 35
P24/OB 36
P25/nBF 37
P26/KCLK 38
P27/KDAT
11
NC
RCB
GATE A20
KEYBOARD CLOCK
KEYBOARD DATA
RAM SELECT JUMPER
MANUFACTURING MODE JUMPER
DISPLAY TYPE SWITCH
KEYBOARD INHIBIT SWITCH
KEYBOARD INTERRUPT
V
DD
U?A
U?A
1
21
2
VCC
KEYBOARD CLOCK
74ALS04
7407
U?B
3
4
KEYBOARD DATA
7407
13
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