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Renesas Talking Pen Firmware

Talking Pen


Pen Reader
RL78 Quick Solutions
Read code printed on paper and play the corresponding audio with the Talking Pen featuring the Renesas RL78/G14 microcontroller, ISL80505 single output low dropout voltage regulator (LDO) and ISL6294 high input voltage charger.

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Description
The Talking Pen solution reads code printed on paper and plays the corresponding audio. Using the industry's smallest low-power RL78/G14 microcontroller, the ID decoder and image sensor reproduce sound files corresponding to the scanned content. Audio data can be saved from a PC to a Micro SD card with a USB cable. It uses the ISL80505 single output low dropout voltage regulator (LDO) capable of providing up to 500mA of output current from an input voltage of 1.8V to 6V. Battery charge control is performed by the ISL6294 high input voltage charger.

Key Features
Minimum instruction execution time: Can be changed from high speed (0.03125μs at 32MHz operation with high-speed on-chip oscillator) to ultra-low speed (30.5μs at 32.768kHz operation with subsystem clock)
General-purpose registers: (8-bit register × 8) × 4 banks
ROM: 128KB, RAM: 16KB, data flash: 8KB
Selectable high-speed on-chip oscillator clock: 64/48/32/24/16/12/8/6/4/3/2/1 MHz (TYP.)
On-chip debug function
On-chip selectable power-on-reset (POR) circuit
On-chip voltage detector (LVD)
On-chip watchdog timer (operable with the dedicated low-speed on-chip oscillator)
On-chip key interrupt function
On-chip clock output/buzzer output controller
On-chip BCD (binary-coded decimal) correction circuit
I/O port: 26
Timer
16-bit timer: 8 channels
12-bit interval timer: 1 channel
Serial interface
CSI: 3 channels
UART: 3 channels
Simplified 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
Power supply voltage: VDD = 1.6V to 5.5V
Operating ambient temperature: TA = -40 °C to +85 °C




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