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4-2. Micro-computer (14.PD75312) terminal function ©
Function
* DA-P20 system control
* LCD display control
* Scan by console SW
* Cassetie hole detection, start/end position detection
ATF ON....L-— Signal on tape
AT02
ATF servo
.
ATF OFF....H-> No signal on tape
a
:
LCD segment aa
ATF servo ON/OFF controller
oO
oO
31
O
HD62004
'| Data synchronizing signal
32
LA
'e)
HD62014
| Data latch clock
HD62004
"
"
a | TROK
tempt OK
TC110GO8AF | Chip enable
EX MUTE
L-OUT, HPcircuit} L-OUT headphone shoot
REC lamp | REC display LED on signal
Reel rotary detection
ee
Data clock
Data output
REE2
Reel comparator'
oO
HD62004
HD62014
Data input
42
TRQ
I
HD62004
| Interrupt request to CPU'
43
REQ
|
PW-SW etc. | PW-SW eject button ON detect
HD62014
| Interrupt to CPU
Battery voltage check
Mechanical block Capstan FG input 468 Hz or 400 Hz
Power source
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