FEATURES

• Pin compatible with mask ROM products (except for the VPP pin)

• On-chip one-time PROM: 8K bytes

• On-chip high-speed RAM: 256 bytes

• Can change the minimum instruction execution time to the fast speed (0.4 ms) and the low speed (1.6 ms)

• I/O ports: 22

• Serial interface: 1 channel

Can select the three-wire serial I/O mode or the UART mode

• Timers: 3 channels

• 8-bit timer/event counter: 2 channels

• Watchdog timer: 1 channel

• Operation possible at the same power supply voltage as in mask ROM products (VDD = 1.8 to 5.5 V)

• Compatible with the QTOPTM microcontroller