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3) Switch, Control Part
Pulse signal sent from Incremental Controller controls
Internal Counter of Gate Array and it sends Count
value to CPU DATA BUS.
Waveform of the signal sent from Trigger Jack is shapen-
ed at Q1 and at One shot-MuIti of IC1 reformed to pulse
wave. LED displaying of Trigger signal ON/OFF is done
by IC1 and Q2.
Input signals
of
MUTE,
BYPASS,
REC CANCEL,
PROG. UP, REC TRIG SW. are input to Gate Array and
sent to CPU as readable data.
*
MIDI signal is sent to and controlled by CPU.
Tact Switch on Front Panel is controlled by CPU.
4) CPU
CPU connects IC28 (Latch), IC26 (ROM), IC27 (RAM)
and IC22 (Gate Array) through decoder and controls
each with DATA BUS.
IC20 Counter HC393 devides the signal (S/H) syncro-
nizing with System Clock of Gate Array and sends it to
CPU in order that CPU can read system clock.
i
-20-
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