Casio AT-1 User Manual

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Pin No. Terminal In/Out Function
1 ~ 8 CD0 ~ CD7 In/Out Data bus
9, 10 Not used
11 GND7 In Ground (0 V) source
12 CK16 Out 16.384 MHz clock output
13 VCC6 In +5 V source
14 CK0 In Clock input. Connected to terminal CK16.
15 TCKB Not used
16 VCC1 In +5 V source
17 GND1 In Ground (0 V) source
18, 19 XT0, XT1 In/Out 16.384 MHz clock input/output. Connected to a crystal oscillator.
20 SGL In System control terminal. Single chip system: Open
21 CCSB In Chip select signal input
22 ~ 25 CA0 ~ CA3 In Address bus
26 CE0 In Not used. Connected to ground.
27 CWRB In Write enable signal
28 CRDB In Read enable signal
29 ~ 32 Not used
33 RESB In Reset signal input
34 TESB In Not used. Connected to +5 V.
35 ~ 39 Not used
40 ~ 49
52 ~ 57
50 VCC2 +5 V source
51 GND2 Ground (0 V) source
58 RA23 Out Not used
59 RA22 Out Chip select signal for the sound source ROM
60, 61 RA20, RA21 Out Not used
62 ~ 73
75 ~ 82
74 GND5 In Ground (0 V) source
83 WOK2 Out Word clock output. Not used.
84 VCC3 In +5 V source
85 GND3 In Ground (0 V) source
86 WOK1 Out Word clock for the DAC
87 SOLM Out Serial data output. Not used.
88 SOLP Out Serial sound data output for the DAC
89 BOK Out Bit clock output for the DAC
90 ~ 92 Not used
93 VCC5 In +5 V source
94 EA14 Out Not used
95, 97
99 ~ 105
107, 109
110, 112
RD0 ~ RD15 In Address bus for the sound source ROM
RA0 ~ RA19 Out Address bus for the sound source ROM
EA0 ~ EA12 Out Address bus for the effect RAM

Casio AT-1 Specifications

General

Brand	Casio
Model	AT-1
Category	Electronic Keyboard
Language	English