Features
● 78K/0 Series (8-bit CPU core)
● Main system clock: RC oscillation
● Minimum instruction execution time:
   1.7 µs (@ 1.2 MHz operation with main system clock)
   61 µs (@ 32.768 kHz operation with subsystem clock 1)
● Instruction set suited to system control
● Interrupt controller
   • Vectored interrupt servicing
● Standby function
   • HALT mode
● Internal memory:
   Mask ROM 48 KB (µPD780957(A))
            60 KB (µPD780958(A))
   RAM 2,048 bytes (µPD780957(A), 780958(A))
● I/O ports (including pins that have an alternate function as segment signal outputs): 69
   • Software programmable pull-up ports: 66
   • Mask option pull-up ports: 3
● LCD controller/driver
● Real-time output function: 4-bit resolution × 4 channels
● MR sampling function: 1 channel (can be used as an 8-bit timer when MR sampling function is not used)
● Timer: 7 channels
   • 16-bit timer/event counter: 2 channels
   • 8-bit timer: 4 channels
   • Watchdog timer: 1 channel
● Serial interface: 2 channels
   • UART mode (with pin switching function): 1 channel (communication is possible with subsystem clock 1 or 2)
   • 3-wire serial I/O mode: 1 channel
● Sampling output timer/detector: 1 channel
   (can be used as a 2-channel 8-bit timer when sampling output timer/detector is not used)
● Power supply voltage: VDD = 2.2 to 3.5 V