 Minimum instruction execution time can be
changed from high speed (0.03125 s: @ 32 MHz
operation with high-speed on-chip oscillator) to
low-speed (1 s: @ 1 MHz operation with highspeed on-chip oscillator)
 General-purpose registers: 8 bits  32 registers (8 bits  8 registers  4 banks)
 ROM: 16 KB, RAM: 1.5 KB, Data flash: 2 KB
 High-speed on-chip oscillator
 Select from 32 MHz (TYP.), 24 MHz (TYP.), 16
MHz (TYP.), 12 MHz (TYP.), 8 MHz (TYP.), 6
MHz (TYP.), 4 MHz (TYP.), 3 MHz (TYP.), 2
MHz (TYP.), and 1 MHz (TYP.)
 On-chip single-power supply flash memory (with
prohibition of block erase/writing function)
 Self-programming
 On-chip debug function
 On-chip power-on-reset (POR) circuit and voltage
detector (LVD)
 On-chip watchdog timer (operable with the
dedicated low-speed on-chip oscillator)
 On-chip clock output/buzzer output controller
 On-chip BCD adjustment
 I/O ports: 26 or 28 (N-ch open drain: 2)
 Timer
 16-bit timer TAU: 4 channels
 Watchdog timer: 1 channel
 Serial interface
 CSI: 1 channel
 UART: 1 channel
 I2C 1 channel (2 slave addresses)