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