The UPD78931x microcontroller is 8-bit 78K0S core microcontroller for LCD control applications.
Operating voltage: VDD = 1.8 to 5.5 V
Max. frequency: 5 MHz
ROM capacities: 8 KB to 16 KB mask ROM and 16 KB flash memory
RAM capacities: 512 bytes
20-pin plastic SSOP package
Main system clock: RC oscillation
Minimum instruction execution time can be changed from high-speed (0.4 µs: @ 5.0 MHz operation with main system clock) to ultra-low-speed (122 µs: @ 32.768 kHz operation with subsystem clock)
I/O ports: 23
Serial interface: 2 channels
- Switchable between 3-wire serial I/O mode and UART mode: 1 channel
- 3-wire serial I/O mode: 1 channel
Timer: 5 channels
- 16-bit timer: 1 channel
- 8-bit timer/event counter: 2 channels
- Watch timer: 1 channel
- Watchdog timer: 1 channel
LCD controller/driver Segment signals: 24, common signals: 4
Vectored interrupt sources: 15
Operating ambient temperature: TA = -40 to +85°C
- Remote controllers, healthcare equipment, etc.
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