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1. Features
1. Ultra-low power consumption technology
- VDD = single power supply voltage of 1.9 to 5.5 V
- HALT mode
- STOP mode
- SNOOZE mode
2. RL78 CPU core
- CISC architecture with 3-stage pipeline
- Minimum instruction execution time: Can be changed from high speed to ultra-low speed
- Multiply/divide/multiply & accumulate instructions are supported.
- Address space: 1 MB
- General-purpose registers: (8-bit register × 8) × 4 banks
- On-chip RAM: 6 KB or 8 KB
3. Code flash memory
- Code flash memory: 64 KB or 128 KB
- Block size: 1 KB
- Prohibition of block erase and rewriting (security function)
- On-chip debug function
- Self-programming (with boot swap function/flash shield window function)
4. High-speed on-chip oscillator
- Select from 24 MHz (TYP.), 12 MHz (TYP.), 6 MHz (TYP.), and 3 MHz (TYP.)
- High accuracy: 1.0 % (VDD = 1.9 to 5.5 V, TA = 20 to +85°C)
- On-chip high-speed on-chip oscillator clock frequency correction function
5. Operating ambient temperature
- TA = -40 to +85°C
6. Power management and reset function
- On-chip power-on-reset (POR) circuit
- On-chip voltage detector (LVD) (Select interrupt and reset from 11 levels)
7. Data transfer controller (DTC)
- Transfer mode: Normal mode, repeat mode, block mode
- Activation source: Start by interrupt sources (40 sources)
- Chain transfer function
8. Serial interface
- CSI: 1channel
- UART/UART (LIN-bus supported): 3 channels
- I2C/Simplified I2C communication: 3 channels
- IrDA: 1 channel
9. Timer
- 16-bit timer: 8 channels
- 12-bit interval timer: 1 channel
- 8-bit interval timer: 4 channels
- Real-time clock 2: 1 channel (calendar for 99 years, alarm function, and clock correction function)
- Watchdog timer: 1 channel (operable with the dedicated low-speed on-chip oscillator)
- Oscillation stop detection circuit: 1 channel
10. LCD controller/driver
- Internal voltage boosting method, capacitor split method, and external resistance division method are switchable
- Segment signal output: 34
- Common signal output: 4
11. A/D converter
- 8/10-bit resolution A/D converter (VDD = 1.9 to 5.5 V): 4 or 6 channels
- 24-Bit ∆Σ A/D converter: 3 or 4 channels
- Internal reference voltage (1.45 V) and temperature sensor
12. Comparator
- 2 channels
- Operation mode: Comparator high-speed mode, comparator low-speed mode, or window mode
- External reference voltage and internal reference voltage are selectable
13. I/O port
- I/O port: 53 or 69 (N-ch open drain I/O [withstand voltage of 6 V]: 3, N-ch open drain I/O [VDD withstand voltage]: 13)
- Can be set to N-ch open drain, TTL input buffer, and on-chip pull-up resistor
- Different potential interface: Can connect to a 1.8/2.5/3 V device
- On-chip clock output/buzzer output controller
14. Others
- On-chip BCD (binary-coded decimal) correction circuit
- On-chip battery backup function