9 Specifications
9-3.
Block diagram
+SIG
-SIG
Chapter
9
50
50
Operation
key
LCD
Low-pass
Buffer
filter
External power supply
(+12V)
Non-volatility
CPU
interface
ADC
Power switch
Charging
circuit
Built-in rechargeable battery
RAM
RTC
Backup
battery
memory
USB
Power supply
unit