Yamaha AW2816, Service Manual

Page: 38 / 120

AW2816
38
PIN
NO.
I/O FUNCTION NAME
PIN
NO.
I/O FUNCTION NAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
TIOC4/DACK0/PE14
PE15
VSS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
VCC
A17
VSS
/RAS/PB2
/CASL/PB3
/CASH/PB4
VSS
/RDWR / PB5
A18//BACK/PB6
A19//BREQ/PB7
A20/PB8
A21/PB9
VSS
/RD
/WDTOVF
/WRH
VCC
/WRL
VSS
/CS1
/CS0
/IRQ3/TCLKD/PA9
TCLKC//IRQ2 /PA8
/CS3
/CS2
/IRQ1/PA5
TXD1
RXD1
/IRQ0/PA2
TXD0
RXD0
D15
D14
D13
VSS
D12
I/O
O
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
O
I
I/O
I/O
I/O
I
I/O
I/O
I/O
O
O
I
O
O
O
I
O
I
O
O
I/O
I/O
O
O
I/O
O
I
I/O
O
I
I/O
I/O
I/O
I
I/O
MTU I/O / DMA acknowledge / Port E
Port E
Ground
Address bus
Power supply
Address bus
Ground
Row address strobe / Port B
Column address strobe (low) / Port B
Column address strobe (high) / Port B
Ground
DRAM read / write / Port B
Address bus / Bus acknowledge / Port B
Address bus / Bus request / Port B
Address bus/ Port B
Ground
Read
Watch dog timer overflow
High write
Power supply
Low write
Ground
Chip select
Chip select
Interrupt request / Timer clock/ Port A
Timer clock / Interrupt request / Port A
Chip select
Chip select
Interrupt request / Port A
Data transmission
Data reception
Interrupt request / Port A
Data transmission
Data reception
Data bus
Ground
Data bus
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
D11
D10
D9
D8
VSS
D7
D6
D5
VCC
D4
D3
D2
D1
D0
VSS
XTAL
MD3
EXTAL
MD2
NMI
VCC
MD1
MD0
PLLVCC
PLLCAP
PLLVSS
PA15 / CK
/RES
PE0/DREQ0
PE1/DRAK0
PE2
PE3
PE4
VSS
PF0 / AN0
PF1 / AN1
PF2 / AN2
PF3 / AN3
PF4 / AN4
PF5 / AN5
AVSS
PF6 / AN6
PF7 / AN7
AVCC
VSS
PE5
VCC
PE6
PE7
PE8
PE9
PE10
VSS
PE11
PE12
/MRES
I/O
I/O
I/O
I/O
I
I/O
I/O
I/O
I
I/O
I/O
I/O
I/O
I/O
I
I
I
I
I
I
I
I
I
I
I
I
O
I
I/O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
O
I
I/O
I/O
I/O
O
O
I
O
O
I
Data bus
Ground
Data bus
Power supply
Data bus
Ground
Crystal oscillator
Mode control
Crystal oscillator
Mode control
Non-maskable interrupt request
Power supply
Mode control
Mode control
PLL Power supply
PLL capacitor
PLL Ground
Port A / Clock
Power on reset
Port E / DMA request
Port E / DMA acknowledge
Port E
Ground
Port F / Analog input
Analog ground
Port F / Analog input
Power supply
Ground
Port E
Power supply
Port E
Ground
Port E
Manual reset
HD6437042AG12F (X0592A00) CPU
HD6437042AF65F (XW647A00) CPU
MAIN: IC501,703 SUB-CPU: IC301