Yamaha D24 Service Manual page 21

D24
HD6477043AF28 (XV736A00) CPU
PIN
NAME I/O
NO.
1 /WRHH O HH write
2 PE14 I/O Port E
3 /WRHL O HL write
4 /CASHH O HH Column address strobe
5 DACK1 O DMA transfer strobe
6 VSS I Ground
7 A0 O
8 A1 O
9 A2 O Address bus
10 A3 O
11 A4 O
12 VCC I Power supply
13 A5 O Address bus
14 VSS I Ground
15 A6 O
16 A7 O
17 A8 O
18 A9 O
19 A10 O
20 A11 O Address bus
21 A12 O
22 A13 O
23 A14 O
24 A15 O
25 A16 O
26 VCC I Power supply
27 A17 O Address bus
28 VSS I Ground
29 /CASHL O HL Column address strobe
30 PA19 I/O Port A
31 /RAS O Row address strobe
32 /CASL O Column address strobe (low)
33 PA18 I/O Port A
34 /CASH O Column address strobe (high)
35 VSS I Ground
36 RDWR O DRAM read/write
37 A18 O
38 A19 O Address bus
39 A20 O
40 VCC I Power supply
41 A21 O Address bus
42 VSS I Ground
43 /RD O Read
44 /WDTOVF O Watch dog timer overflow
45 D31 I/O Data bus
46 D30 I/O Data bus
47 /WRH O High write
48 /WRL O Low write
49 /CS1 O Chip select
50 /CS0 O Chip select
51 /IRQ3 I Interrupt request
52 /IRQ2 I Interrupt request
53 /CS3 O Chip select
54 /CS2 O Chip select
55 VSS I Ground
56 D29 I/O
57 D28 I/O
58 D27 I/O Data bus
59 D26 I/O
60 D25 I/O
61 VSS I Ground
62 D24 I/O Data bus
63 VCC I Power supply
64 D23 I/O
65 D22 I/O
66 D21 I/O
67 D20 I/O Data bus
68 D19 I/O
69 D18 I/O
70 D17 I/O
71 VSS I Ground
72 D16 I/O Data bus
21
FUNCTION
PIN
NAME I/O
NO.
73 D15 I/O
74 D14 I/O
Data bus
75 D13 I/O
76 D12 I/O
77 VCC I Power supply
78 D11 I/O Data bus
79 VSS I Ground
80 D10 I/O
81 D9 I/O
82 D8 I/O Data bus
83 D7 I/O
84 D6 I/O
85 VCC I Power supply
86 D5 I/O Data bus
87 VSS I Ground
88 D4 I/O
89 D3 I/O
90 D2 I/O Data bus
91 D1 I/O
92 D0 I/O
93 VSS I Ground
94 XTAL I Crystal oscillator
95 MD3 I Mode select
96 EXTAL I Crystal oscillator
97 MD2 I Mode select
98 NMI - Non-maskable interrupt
99 VCC I Power supply
100 PA16 I/O Port A
101 PA17 I/O Port A
102 MD1 I Mode select
103 MD0 I Mode select
104 PLLVCC I PLL Power supply
105 PLLCAP I PLL capacitor
106 PLLVSS I PLL Ground
107 CK I/O Clock
108 /RES I Reset
109 PE0 I/O Port E
110 PE1 I/O Port E
111 /DREQ1 I DMA transfer request
112 VCC I Power supply
113 PE3 I/O
114 PE4 I/O
Port E
115 PE5 I/O
116 PE6 I/O
117 VSS I Ground
118 PF0 I/O
119 PF1 I/O
120 PF2 I/O
Port F
121 PF3 I/O
122 PF4 I/O
123 PF5 I/O
124 AVSS I Analog ground
125 PF6 I/O Port F
126 PF7 I/O Port F
127 AVREF I Analogreference voltage
128 AVCC I Analog power supply
129 VSS I Ground
130 RxDO I Receive data
131 TxDO O Transmit data
132 SCK0 I/O Serial clock
133 RxD1 I Receive data
134 TxDO O Transmit data
135 VCC I Power supply
136 SCK1 I/O Serial clock
137 PE7 I/O
138 PE8 I/O
Port E
139 PE9 I/O
140 PE10 I/O
141 VSS I Ground
142 PE11 I/O
143 PE12 I/O Port E
144 PE13 I/O
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FUNCTION