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EXPLANATION OF MICROCOMPUTER
89 /CS4 O
90 /CS5 O
91 /CS6 O
92 /CE2A O
93 GND PWR 0V
94 PTD[7] O
95 LVcc PWR +3.3V
96 /RAS O
97 PTD[1] O
98 /CAS O
99 PTD[3] I/O
100 PTD[4] I/O
101 /IOIS16 I Pull-up
102 /BACK O
103 /BREQ I Pull-up
Hardwave wait request
104 /WAIT I
105 /DACK0 O
DMA acknowledge 0
DMA acknowledge 1
106 /DACK1 O
107 PTE[2] I
108 PTE[3] I
109 PTF[0] I
110 PTF[1] I
111 PTF[2] I
112 PTF[3] I Pull-up
113 PTF[4] O
114 PTG[0] I Pull-up
115 GND PWR 0V
116 PTG[1] I Pull-up
117 LLVcc PWR +1.9V
118 PTG[2] I Pull-up
119 PTG[3] I Pull-up
120 PTF[5] I/O
121 PTF[6] I/O
122 /ASEMD0 I Pull-up
PLL2 external capacitance pin
PLL1 external capacitance pin
123 LLVcc PWR +1.9V
124 CAP1 -
125 GND PWR 0V
126 GND PWR 0V
127 CAP2 -
128 LLVcc PWR +1.9V
129 MD1 I Pull-up
130 GND PWR 0V
77 /BS O
78 /RD O
79 /WE0 O
80 /WE1 O
81 /WE2 O
82 /WE3 O
83 RD/WR O
84 GND PWR 0V
85 /CS0 O
86 LVcc PWR +3.3V
87 /CS2 O
88 /CS3 O
Pin I/O
IC801 (HD6417706)2/3
Signal
Function
NC
NC
NC
NC
NC
NC
NC
NC
NC
Read strobe
Chip select
Chip select 3
Chip select 4
Chip select 5
Chip select 6
Input/output port D
Input/output port D
Input/output port E
Input/output port E
Input/output port F
Input/output port F
Input/output port F
Lower32 Mbytes address RAS
Lower32 Mbytes address CAS
D70-D0 select signal
D15-D8 select signal
D23-D16 select signal
D31-D24 select signal
Read/write select signal