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THE FUNCTIONS
OF
MAIN
ICs
CPU
(
H16
)
TG88
(
TONE GENERATOR
)
DF88
(
DIGITAL FILTER
)
MAPI
6
(
DECORDER
/
CARD BUFFER
)
KSP
(
KEY SCAN PROCESSOR
)
HD641016CP10
MB87726
MB87727
MB622472
M37450M4-233FP
TG88 *** TG88( MB87726
)
is
the
IC
which
is
developed
for the
sound source
of
the electronic instruments.
DF88 *** DF88( Digital Filter
88
)
is
DSP-LSI which works for VDF
(
Variable
Digital
Filter
),
VDA
(
Variable Digital Amplifier
),
MIXER
of
PCM synthesizer
and
PCM
piano.
The following are the main functions of
DF88.
(
1
)
It
receives Voice
Data.
(
Parallel
in
Block
)
(
2
)
It
exchanges the data which
CPU.
(
CPU Interface Block
)
(
3
)
It
operates
Filter,
EQ,
Exiter
and
EG.
(
DSP Block
)
(
4
)
It
mixes
the filtered
voice
output.
(
Mixer Block
)
(
5
)
It
sends the data
to
MDE1.
(
Parallel Out Block
)
(
6
)
It
sends the data
to MDE2.
(
Serial Out Block
)
MAP16 ** MAP16( MB622472
)
is
CPU Gate Array only for WAVE STATION.
The main
functions are the Gate Arrray function connected which CPU such
as
Address
Latch,
Address
Decoder,
Read/Write Pulse Occurrence
Circuit,
and the
interface with the
IC card.
KSP ****
KSP(
M37450M4-233FP
)
scans the
data
of
the
keys,
the panel switches,
the wheel,
the joystick and the pedals, converts those data to serial and
transmits them
to
CPU.
44
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