Pin No. Pin Name I/O Function
1 PC0/AN8 I H: Fixed
2 PC1/AN9 I H: Fixed
3 PC2/AN10 I H: NTSC L: PAL
4 PC3/AN11 I H: NORMAL L: Low Battery
5 AVSS I Analog ground
6 TEST I L: Fixed
7 X2 O Sub clock, Not used
8 X1 I Sub clock, Not used
9 VSS I Digital ground
10 CLKI I System clock, 8MHz Ceramic vibrator
11 CLKO O System clock, 8MHz Ceramic vibrator
12 RES I Reset from Front micom
13 MD0 I H: Fixed
14 P20 I Edit interface clock
15 P21 O Not used
16 P22 O Not used
17 P23 O Reset (to Edit micom &OSD)
18 P24 O Not used
19 P25 O Not used
20 P26 O Controller micom communications (CS)
21 P27 O H: Not used
22 SCK1/P30 I/O Controller & Keyboard communication
23 SI1/P31 I Controller & Keyboard communication
24 SO1/P32 O Controller & Keyboard communication
25 SCK2/P33 I/O Edit, IR & OSDC communication
26 SI2/P34 I Edit, IR & OSDC communication
27 SO2/P35 O Edit, IR & OSDC communication
28 P36 O Not used
29 P37 O Not used
30 VSS I Digital ground
31 V3 NC.
32 V2 NC.
33 V1 NC.
34 VDD I Digital power
35 PA3 O Not used
36 PA2 O Not used
37 PA1 O OSDC communication (CS)
38 PA0 O Edit micom communication (CS)
39 P50 O Not used
40 P51 O H: Internal sync. on no input L: Forced internal sync
41 P52 O Not used
42 P53 O ID out
43 P54 O Not used
44 P55 O Not used
45 P56 O Not used
46 P57 O Not used
47 P60 O Not used
48 P61 O Not used
49 P62 O Not used
50 P63 O Not used
Pin No. Pin Name I/O Function
51 P64 O Not used
52 P65 O Not used
53 P66 O Not used
54 P67 O Not used
55 P70 O Address bus (LSB)
56 P71 O Address bus (LSB)
57 P72 O Address bus (LSB)
58 P73 O Address bus (LSB)
59 P74 O Address bus (LSB)
60 P75 O Address bus (MSB)
61 P76 O Not used
62 P77 O Not used
63 P80 O Chip sel (RAM access)
64 P81 O Chip sel (Menu ROM access)
65 P82 O PGM
66 P83 O Not used
67 P84 O Middle address enable
68 P85 O High address enable
69 P86 O Memory output enable
70 P87 O Memory write enable
71 P90 O Data bus (LSB)
72 P91 O Data bus (LSB)
73 P92 O Data bus (LSB)
74 P93 O Data bus (LSB)
75 P94 O Data bus (LSB)
76 P95 O Data bus (LSB)
77 P96 O Data bus (LSB)
78 P97 O Data bus (MSB)
79 VDD I Digital power
80 P10 O Not used
81 P11 O Not used
82 P12 O Not used
83 P13 O Not used
84 P14 O Not used
85 IRQ1/P15 I Not used
86 IRQ2/P16 I VD
87 IRQ3/P17 O VD
88 DTR O Edit I/F
89 RXD I Edit I/F
90 TXD O Edit I/F
91 DSR I Edit I/F
92 AVDD I Analog power
93 PB0/AN0 O (INT)/ EXT in
94 PB1/AN1 I H: Busy (from IR micom)
95 PB2/AN2 O Not used
96 PB3/AN3 O Not used
97 PB4/AN4 O Not used
98 PB5/AN5 O Not used
99 PB6/AN6 O Not used
100 PB7/AN7 O Not used
5-2. Front Micro Computer HD6433837SA90F (CB-64/64P BOARD IC805)
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