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DSP and DAC CIRCUIT
The DSP (Digital Signal Processor) and DAC (Digital Analog Converter) consists of the following circuits.
RA22
Working RAM (256K-bit)
TC55257DFL-70L
LSI4
ROM2
LHMN5KPN
LSI2 (32Mbit)
ROM1
LHMN5KPP
LSI1 (32Mbit)
BOK
EA0 ~
EA14
D0 ~
D15
ED0 ~
ED15
KC0 ~
KC7
SI0 ~ SI9
FI0 ~ FI9
RA0 ~
RA21
RA0 ~ RA21
CS
RA23
CE,OE A0 ~ A20,NC Q0 ~ Q15
CE,OE A0 ~ A20,NC Q0 ~ Q15
WE
OE
D0 ~ D15
A0 ~ A14
PG
24.576 MHz
DAC
LOUT
ROUT
SORP: Sound data
BOK: Bit clock
WOK1: Word clock
CLK
SI
LRCK
LRCK0
DOUT
SORP
WOK1
WOKI0 DI
D0 LRCK0
DSP
HG51B155FD
LSI3
CPU
HD6433048SA89F
LSI9
Key Controller
TC190C020AF-001
LSI16
RD0 ~ RD15
RA0 ~
RA21
D8 ~
D15
Control
data
key
data
key
data
Key-
board
Summary of Contents for WK-1800
Page 30: ...29 PRINTED CIRCUIT BOARD Main PCB JCM733 MA1M Top View Bottom View 1 6 5 4 3 2 9 10...
Page 31: ...30 Sub PCB JCM733 MA2M 7 8 Sub PCB JCM733 MA3M Top View Top View...
Page 32: ...31 Console PCBs JCM733 CN1M Top View Top View Console PCBs JCM733 CN2M...
Page 33: ...32 Display PCB JCM733 LCD1M Top View Bottom View...
Page 34: ...33 Keyboard PCBs JCM763T KY1M Top View Top View Keyboard PCBs JCM763T KY2M...
Page 40: ...39 SubPCB JCM733 MA2M MA3M 7 8 Regulator IC Power Amp...
Page 41: ...40 Console PCBs JCM733 CN1M CN2M S Register S Register...
Page 42: ...41 LCD Driver PCB JCM733 LCD1M LCD Driver Back Light Circuit...
