Features
â 78K/0 Series (8-bit CPU core)
â Main system clock: RC oscillation
â 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)
â Instruction set suited to system control
â Interrupt controller
⢠Vectored interrupt servicing
â Standby function
⢠HALT mode
â Internal memory:
Mask ROM 48 KB (µPD780957(A))
60 KB (µPD780958(A))
RAM 2,048 bytes (µPD780957(A), 780958(A))
â 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
â LCD controller/driver
â Real-time output function: 4-bit resolution à 4 channels
â MR sampling function: 1 channel (can be used as an 8-bit timer when MR sampling function is not used)
â Timer: 7 channels
⢠16-bit timer/event counter: 2 channels
⢠8-bit timer: 4 channels
⢠Watchdog timer: 1 channel
â 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
â Sampling output timer/detector: 1 channel
(can be used as a 2-channel 8-bit timer when sampling output timer/detector is not used)
â Power supply voltage: VDD = 2.2 to 3.5 V
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