Reading pen

The reading pen solution reads the code printed on the paper and plays the corresponding audio. The industry's lowest power RL78/G14 microcontroller, ID decoder and image sensor are used to reproduce the sound file corresponding to the scanned content. Audio data can be saved from PC to Micro SD card using USB cable. The ISL80505 single-output low-dropout linear regulator (LDO) used is capable of providing an output current of up to 500mA within an input voltage range of 1.8V to 6V. Battery charging control is performed by the ISL6294 high input voltage charger.

main feature

• Minimum instruction execution time: The shortest instruction execution time can be changed from high speed (0.03125μs: high-speed internal oscillator clock runs at 32MHz) to ultra-low speed (30.5μs: low-speed subsystem clock runs at 32.768kHz).

• General register: (8-bit register × 8) × 4 groups

• ROM: 128KB, RAM: 16KB, Data Flash: 8KB

• Selectable high-speed internal oscillator clock: 64/48/32/24/16/12/8/6/4/3/2/1 MHz (TYP.)

• Built-in on-chip debugging capabilities

• Built-in selectable power-on reset (POR) circuit

• Built-in voltage detection (LVD) circuit

• Built-in watchdog timer (can run from dedicated low-speed internal oscillator clock)

• Built-in key interrupt function

• Built-in clock output/buzzer output control circuit

• Built-in decimal correction (BCD) circuit

• I/O ports: 26

• timer

• 16-bit timer: 8 channels

• 12-bit interval timer: 1 channel

• serial interface

• CSI: 3 channels

• UART: 3 channels

• Simple I2C communication: 3 channels

• Multi-master I2C communication: 1 channel

• 8/10-bit resolution A/D converter: 8 channels

• 8/10-bit resolution D/A converter: 1 channel

• Comparator: 2 channels

• Data Transfer Controller (DTC)

• Event Link Controller (ELC)

• Standby function: HALT mode or STOP mode or SNOOZE mode

• Supply voltage: VDD = 1.6V to 5.5V

• Operating ambient temperature: TA = -40°C to +85°C