Yamaha AD8HR Service Manual page 13

LSI PIN DESCRIPTION
HD6437042AF53 (XY721A00) CPU
PIN
NAME
NO.
1 TIOC4/DACK0/PE14
2 PE15
3 VSS
4 A0
5 A1
6 A2
7 A3
8 A4
9 A5
10 A6
11 A7
12 A8
13 A9
14 A10
15 A11
16 A12
17 A13
18 A14
19 A15
20 A16
21 VCC
22 A17
23 VSS
24 /RAS/PB2
25 /CASL/PB3
26 /CASH/PB4
27 VSS
28 /RDWR / PB5
29 A18//BACK/PB6
30 A19//BREQ/PB7
31 A20/PB8
32 A21/PB9
33 VSS
34 /RD
35 /WDTOVF
36 /WRH
37 VCC
38 /WRL
39 VSS
40 /CS1
41 /CS0
42
/IRQ3/TCLKD/PA9
43
TCLKC//IRQ2 /PA8
44 /CS3
45 /CS2
46 /IRQ1/PA5
47 TXD1
48 RXD1
49 /IRQ0/PA2
50 TXD0
51 RXD0
52 D15
53 D14
54 D13
55 VSS
56 D12
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（LSI 端子機能表）
I/O FUNCTION
I/O MTU I/O / DMA acknowledge / Port E
O Port E
I Ground
O
O
O
O
O
O
O
O
O Address bus
O
O
O
O
O
O
O
O
I Power supply
O Address bus
I Ground
I/O Row address strobe / Port B
I/O Column address strobe (low) / Port B
I/O Column address strobe (high) / Port B
I Ground
I/O DRAM read / write / Port B
I/O Address bus / Bus acknowledge / Port B
I/O Address bus / Bus request / Port B
O
Address bus/ Port B
O
I Ground
O Read
O Watch dog timer overflow
O High write
I Power supply
O Low write
I Ground
O Chip select
O Chip select
I/O Interrupt request / Timer clock/ Port A
I/O Timer clock / Interrupt request / Port A
O Chip select
O Chip select
I/O Interrupt request / Port A
O Data transmission
I Data reception
I/O Interrupt request / Port A
O Data transmission
I Data reception
I/O
I/O Data bus
I/O
I Ground
I/O Data bus
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PIN
NAME I/O
NO.
57 D11 I/O
58 D10 I/O
Data bus
59 D9 I/O
60 D8 I/O
61 VSS I Ground
62 D7 I/O
63 D6 I/O Data bus
64 D5 I/O
65 VCC I Power supply
66 D4 I/O
67 D3 I/O
68 D2 I/O Data bus
69 D1 I/O
70 D0 I/O
71 VSS I Ground
72 XTAL I Crystal oscillator
73 MD3 I Mode control
74 EXTAL I Crystal oscillator
75 MD2 I Mode control
76 NMI I Non-maskable interrupt request
77 VCC I Power supply
78 MD1 I Mode control
79 MD0 I Mode control
80 PLLVCC I PLL Power supply
81 PLLCAP I PLL capacitor
82 PLLVSS I PLL Ground
83 PA15 / CK O Port A / Clock
84 /RES I Power on reset
85 PE0/DREQ0 I/O Port E / DMA request
86 PE1/DRAK0 O Port E / DMA acknowledge
87 PE2 O
88 PE3 O Port E
89 PE4 O
90 VSS I Ground
91 PF0 / AN0 I
92 PF1 / AN1 I
93 PF2 / AN2 I Port F / Analog input
94 PF3 / AN3 I
95 PF4 / AN4 I
96 PF5 / AN5 I
97 AVSS I Analog ground
98 PF6 / AN6 I
Port F / Analog input
99 PF7 / AN7 I
100 AVCC I Power supply
101 VSS I Ground
102 PE5 O Port E
103 VCC I Power supply
104 PE6 I/O
105 PE7 I/O
106 PE8 I/O Port E
107 PE9 O
108 PE10 O
109 VSS I Ground
110 PE11 O
Port E
111 PE12 O
112 /MRES I Manual reset
AD8HR
MAIN: IC2
FUNCTION
13