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CIRCUIT DESCRIPTION
Slave microprocessor IC1 (uPD7508G-8 17-00)
Port Assignment
Assist motor
Communication request
control iC
5
(SCK)
(Si)
(SO)
MOTOR
(PLAY)
MOTOR
(EJECT)
Reel pulse interrupt
PLA.
C.ST OUT
MUTE
TAPE/TUNER
FWD/REV
METAL/NORMAL
NR ON/OFF
DOLBY B/C
*
uPD7508G-817-00
Communication request
SCK Request
Head position
FF/REW Gear position
C402X/C3438 CHECK
Music selection amplifier input
Supply reel pulse
Take-up reel pulse
15
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