Casio WK-1500 Service Manual page 9

Pin No. Terminal
106 EOEB
108 VCC7
111 ECEB
113 ~ 117 ED11 ~ ED15
118 VCC4
119 GND4
120 ~ 122 ED8 ~ ED10
123 ~ 130 ED0 ~ ED7
131 GND6
132 ~ 134 —
135, 136 —
Block diagram of DSP and DAC circuit
D0 ~ D7
A0 ~ A3
KO signal
LSIB
generator
RDAB
LSI17
WRAB
RESET
UPD65611GB
I n / O u t
Out Read enable signal output for the effect RAM
In +5 V source
Out Chip select signal output for the effect RAM
— Not used
In +5 V source
In Ground (0 V) source
— Not used
In/Out Data bus for the effect RAM
In Ground (0 V) source
— Not used. Connected to ground.
— Not used
Sound Source ROM
LSI12
MX23C2410MC-12CA51
CE
A0 ~ A20 Q0 ~ Q15
RD0 ~
RA0 ~
RA22
RD15
RA20
DSP
LSI11
CCSB
CRDB
HG51B155FD-1
CWRB
RESB
ECEB EOEB EWEB
ED0 ~
WE
OE
CS
ED7
I/01 ~ I/08 A0 ~ A14
Effect RAM (256K-bit)
LSI13
LC33832M-70-TLM
— 9 —
Function
SOLP: Sound data
BOK: Bit clock
WOK1: Word clock
DAC
SOLP IC11
SI
BOK
CLK
WOK1
LRCK
UPD6376GS
PG
X11
24.576 MHz
EA0 ~
EA14
ROUT
LOUT