Casio WK-1500 CE1, Trsb, GND7, VCC6, CK0, Tckb, VCC1, GND1, Sgl, Ccsb, CE0, Cwrb, Crdb, Resb, Bok

Pin No.	Terminal	In/Out	Function
1 ~ 8	CD0 ~ CD7	In/Out	Data bus
9, 10	CE1, TRSB	—	Not used
11	GND7	In	Ground (0 V) source
12	CK16	Out	Terminal for 24.576 MHz clock check point
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	24.576 MHz clock input/output
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	RD0 ~ RD15	In	Data bus for the sound source ROM
52 ~ 57
50	VCC2	In	+5 V source
51	GND2	In	Ground (0 V) source
58	RA23	Out	Not used
59	RA22	Out	Chip select signal for the sound source ROM
60	RA21	Out	Not used
61 ~ 73	RA0 ~ RA20	Out	Address bus for the sound source ROM
75 ~ 82
74	GND5	In	Ground (0 V) source
83	WOK2	Out	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	Not used
88	SOLP	Out	Serial sound data output
89	BOK	Out	Bit clock output
90 ~ 92	—	—	Not used
93	VCC5	In	+5 V source
94, 95
97 ~ 105	EA0 ~ EA14	Out	Address bus for the effect RAM
107, 109
110, 112
96	EWEB	Out	Write enable signal for the effect RAM

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