
— 10 —
POWER SUPPLY CIRCUIT
The power supply circuit provides various voltages as shown below.
The voltage VDD (+5 V) is provided as long as batteries or AC adaptor is set.
Other voltages are controlled by APO (Auto Power Off) signal from CPU.
CPU
HD6473042F16-463
LSI9
PA 7
NMI
PW/SW
APO
NMI
PW/ON
APO
Power Supply
+9V ~ +12V
From
Batteries or
AC Adaptor
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