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Appendix
Here you will find schematics of the CPU board for
MB90F543, the Main board schematics, Interface bus and
Device Bus description
Device Bus (K2) and Interface Bus (K1 ) connectors pins:
DIN Conn.
PIN
PIN NO.
A1
B1
C1
A2
B2
C2
A3
B3
C3
A4
B4
C4
A5
B5
C5
A6
B6
C6
A7
B7
C7
A8
B8
C8
A9
B9
C9
A10
Device Bus
CPU Pin Nr.
Function
18
SOT0
19
SCK0
20
SIN0
24
SOT1
22
SCK1
21
SIN1
69
INT0
70
INT1
71
INT2
72
INT3
29
INT4
30
INT5
31
INT6
32
INT7
25
SOT2
26
SCK2
28
SIN2
90
90
90
90
15
Chapter
Interface Bus
CPU PIN Nr.
SIGNAL
85
AD00
86
AD01
87
AD02
88
AD03
89
AD04
90
AD05
91
AD06
92
AD07
93
AD08
94
AD09
95
AD10
96
AD11
97
AD12
98
AD13
99
AD14
100
AD15
1
A16
2
A17
3
A18
4
A19
5
A20
6
A21
7
A22
8
A23
9
ALE
10
\RD
12
\WRL
13
\WRH
2nd Function
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
P24
P25
P26
P27
P30
P31
P32
P33
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