KBD42W11 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
Manufacturer
KBD42W11 Datasheet PDF : 16 Pages
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PIN DESCRIPTION
PIN NO.
PIN NO.
(40 Pin DIP) (44 Pin PLCC)
I/O
1
2
I
2
3
I
3
4
O
4
5
I
5
6
-
6
7
I
7
8
-
8
9
I
9
10
I
10
11
I
11,26
1,12,13,23,29, 34
-
12,13,14,
14,15,16,17,18,
I/O
15,16,17,
19,20,21
18, 19
20
22
-
21
24
O
22
25
O
23
26
I/O
24
27
I/O
25
28
-
27
30
I/O
28
31
I/O
29
32
I/O
30
33
I/O
31
35
I
32
36
I
33
37
I
34
38
I
35
39
O
36
40
O
37
41
O
38
42
O
39
43
I
40
44
-
NAME
T0
XIN
XOUT
nRESET
VDD
nCS
VSS
nRD
A2
nWR
NC
D0-D7
FUNCTION
K/B Clock Input
Crystal Clock I/P
Crystal Clock O/P
Chip Reset
Optional +5V Power Supply
Chip Select
Optional Ground Power
I/O Read
Connect to Address A2
I/O Write
Reserved
Data Bus D0 - D7
VSS
P20
P21
P22
P23
VDD
P10
P11
P12
P13
P14
P15
P16
P17
P24
P25
P26
P27
T1
VDD
Ground Power Supply
Bit 0 of Port 2 (RCB: System
Reset)
Bit 1 of Port 2 (GA20: GATE A20)
Bit 2 of Port 2
Bit 3 of Port 2
Optional +5V Power Supply
Bit 0 of Port 1
Bit 1 of Port 1
Bit 2 of Port 1
Bit 3 of Port 1
Bit 4 of Port 1 (RAM Jumper
Select)
Bit 5 of Port 1 (JUMP)
Bit 6 of Port 1 (Display Select)
Bit 7 of Port 1 (K/B Inhibit Switch)
Bit 4 of Port 2 (OBF O/P Interrupt)
Bit 5 of Port 2 (I/P Buffer Empty)
Bit 6 of Port 2 (K/B Clock O/P)
Bit 7 of Port 2 (K/B Data O/P)
K/B Data Input
+5V Power Supply
4
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