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CPU (HD6437020U01X) Pin Description
No.
Signal
In/Out
1 AD0
In/Out
Data bus
2 AD1
In/Out
Data bus
3 AD2
In/Out
Data bus
4 Vss
In
Gnd
5 AD3
In/Out
Data bus
6 AD4
In/Out
Data bus
7 AD5
In/Out
Data bus
8 AD6
In/Out
Data bus
9 AD7
In/Out
Data bus
10 AD8
In/Out
Data bus
11 AD9
In/Out
Data bus
12 AD10
In/Out
Data bus
13 Vcc
In
Power
14 AD11
In/Out
Data bus
15 Vss
In
Gnd
16 AD12
In/Out
Data bus
17 AD13
In/Out
Data bus
18 AD14
In/Out
Data bus
19 AD15
In/Out
Data bus
20 A0
Out
Address bus
21 A1
Out
Address bus
22 A2
Out
Address bus
23 A3
Out
Address bus
24 Vss
In
Gnd
25 A4
Out
Address bus
26 A5
Out
Address bus
27 A6
Out
Address bus
28 A7
Out
Address bus
29 A8
Out
Address bus
30 A9
Out
Address bus
31 A10
Out
Address bus
32 Vss
In
Gnd
33 A11
Out
Address bus
34 A12
Out
Address bus
35 A13
Out
Address bus
36 A14
Out
Address bus
37 A15
Out
Address bus
38 Vcc
In
Power
39 A16
Out
Address bus
40 A17
Out
Address bus
41 Vss
In
Gnd
42 A18
Out
Address bus
43 A19
Out
Address bus
44 A20
Out
Address bus
45 A21
Out
Address bus
46 (CS0)
Out
Chip select 0
47 (CS1)
Out
Chip select 1
48 (CS2)
Out
Chip select 2
49 (CS3)
Out
Chip select 3
50 Vss
In
Gnd
Description
No.
Signal
51 (CS4)
52 (RAS)
52 (CS5)
53 (CS6)
54 (WAIT)
55 (WR)
56 (PA5)
57 (RD)
58 (BACK)
59 Vss
60 (BREQ)
61 (IRQOUT)
62 DPL
63 Vcc
64 DPH
65 (IRQ0)
66 (IRQ1)
67 (IRQ2)
68 (IRQ3)
69 CK
70 Vss
71 EXTAL
72 XTAL
73 Vcc
75 (WDTOVF)
76 (RES)
77 MD0
78 MD1
79 MD2
80 Vcc
81 Vss
82 Vss
83 TIOCA2
84 TCOCB2
85 TIOCA3
86 TCOCB3
87 TIOCA4
88 Vcc
89 TCOCB4
90 TCLKC
91 TCLKD
92 Vss
93 RxD0
94 TxD0
95 RxD1
96 TxD1
97 (IRQ4)
98 (IRQ5)
99 (IRQ6)
100 (IRQ7)
Page 7
In/Out
Description
Out
Chip select 4
Out
Low address strobe
Out
Chip select 5
Out
Chip select 6
In
Wait
Out
Write
Out
Gnd
Out
Read
Out
Acknowledge of Bus right Request
In
Gnd
In
Bus right Request
Out
IRQ Request
In/Out
Parity for D7 ~ D0
In
Power
In/Out
Parity for D15 ~ D8
In
IRQ Request
In
IRQ Request
In
IRQ Request
In
IRQ Request
Out
System clock
In
Gnd
In
Exterior clock
In
Crystal oscillator
In
Power
Out
Watch dog timer over flow
In
Reset
In
Mode
In
Mode
In
Mode
In
Power
In
Gnd
In
Gnd
In/Out
In/Out compare (Ch 2)
In/Out
In/Out compare (Ch 2)
In/Out
In/Out compare (Ch 3)
In/Out
In/Out compare (Ch 3)
In/Out
In/Out compare (Ch 4)
In
Power
In/Out
In/Out compare (Ch 4)
In
ITU Timer clock
In
ITU Timer clock
In
Gnd
In
Receiving data
Out
Sending data
In
Receiving data
Out
Sending data
In
IRQ Request
In
IRQ Request
In
IRQ Request
In
IRQ Request
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