Casio CE-6800, Service Manual

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Pin No. Signal Name Description In/Out
51 P83 RB3 Bank selection RB3 Out
52 P84 RB4/CB1 Bank selection RB4/CB1 Out
53 P85 FB0/CB2 Bank selection FB0/CB2 Out
54 P86 FB1 Bank selection FB1 Out
55 P87 FB2 Connected to GND
56 P40 D0 Data/address bus D0/A0 In/Out
57 P41 D1 Data/address bus D1/A1 In/Out
58 P42 D2 Data/address bus D2/A2 In/Out
59 P43 D3 Data/address bus D3/A3 In/Out
60 P44 D4 Data/address bus D4/A4 In/Out
61 P45 D5 Data/address bus D5/A5 In/Out
62 P46 D6 Data/address bus D6/A6 In/Out
63 P47 D7 Data/address bus D7/A7 In/Out
64 P50 A8 Address bus A8 Out
65 P51 A9 Address bus A9 Out
66 P52 A10 Address bus A10 Out
67 P53 A11 Address bus A11 Out
68 P54 A12 Address bus A12 Out
69 P55 A13 Address bus A13 Out
70 P56 A14 Address bus A14 Out
71 P57 A15 Address bus A15 Out
72 VSS GND Power supply GND
73 P60 A16 Address bus A16 Out
74 P61 A17 Address bus A17 Out
75 P62 A18 Address bus A18 Out
76 P63 A19 Address bus A19 Out
77 P64 RD Read signal Out
78 P65 WR Write signal Out
79 P66 WAIT Wait signal In
80 P67 ASTB Address strobe signal Out
81 VDD VDD Power supply VDD +5V
82 P100 BUZZER Buzzer output signal Out
83 P101 R.FEED Receipt paper feed signal Out
84 P102 J.FEED Journal paper feed signal Out
85 P103 STAMP Stamp signal Out
86 P30 HDGATE1 Head gate 1 signal Out
87 P31 FLASH RST Flash reset signal Out
88 P32 DTR1 COM1 DTR signal Out
89 P33 CTS1 COM1 CTS signal In
90 P34 DTR2 COM2 DTR signal Out
91 P35 HDPLS Head pulse signal In
92 P36 DW1 Drawer signal 1 Out
93 P37 DW2 Drawer signal 2 Out
94 TEST GND Connected to GND
95 P90 MODE SIN Mode switch data in signal In
96 P91 MODE SCK Mode switch SCK signal Out
97 P92 MODE SLOAD Mode switch data load signal Out
98 P93 KI SLOAD Key data load signal Out
99 P94 HD8 HEAD PIN DRIVE HD8 Out
100 P95 HD9 HEAD PIN DRIVE HD9 Out