Product Overview:
The R8C/34U is based on the R8C CPU Core. Maximum operating frequency is 20MHz. A Flash Memory Version is available. Internal Flash Memory is programmable on a single power source.
Key Features:
- 8-bit Multifunction Timer with 8-bit prescaler (Timer RA and RB): 2
- 16-bit Input Capture/Output Compare Timer (Timer RC and RF): 2
- UART/Clock Synchronous Serial Interface: 4 channels
- I2C-bus Interface (IIC)/Synchronous Serial Communication Unit: 1 channel
- LIN Module: 1 channel (Timer RA, UART0)
- USB Module (Peripheral): Full-speed (12 Mbps, USB 2.0 specification compliant)
- 10-bit A/D Converter: 12 channels
- Comparator: 2
- DTC (Data Transfer Controller): 1 channel
- Watchdog Timer
- Clock Generating Circuits: XIN Clock Generation Circuit, On-chip Oscillator (High/Low Speed), PLL Frequency Synthesizer
- Oscillation Stop Detection Function
- Voltage Detection Circuit
- Power-On Reset Circuit
- I/O Ports: 36 (incl. LED drive ports)
- External Interrupt Pins: 9
- Data Flash with Background Operation (BGO) function: 4KB
Key Applications:
Peripherals (USB applicable), audio components, cameras, televisions, household appliances, office equipment, communication devices, mobile devices, industrial equipment, and other applications.
R8C/34U Block diagram
Product Lineup:
| Part No. | ROM | RAM | ROM Type | Operating Frequency / Supply Voltage |
| R5F21346UDFP | 32K + 4K | 4K | Flash memory | 20MHz/3.0V to 5.5V(when using USB), 20MHz/2.7 to 5.5V, 5MHz/1.8 to 5.5V |
| R5F21346UNFP | 32K + 4K | 4K | Flash memory | 20MHz/3.0V to 5.5V(when using USB), 20MHz/2.7 to 5.5V, 5MHz/1.8 to 5.5V |
| R5F21348UDFP | 64K + 4K | 8K | Flash memory | 20MHz/3.0V to 5.5V(when using USB), 20MHz/2.7 to 5.5V, 5MHz/1.8 to 5.5V |
| R5F21348UNFP | 64K + 4K | 8K | Flash memory | 20MHz/3.0V to 5.5V(when using USB), 20MHz/2.7 to 5.5V, 5MHz/1.8 to 5.5V |
