Renesas R5F104BDAFP#X0

Overview

R5F104BDAFP#X0 from Renesas is a 32-pin LQFP-32, 8-bit RL78/G14 microcontroller with 48 KB flash memory, 4 KB data flash, and 4 KB RAM, operating at 32 MHz (44 DMIPS), supporting ultra-low-power modes (66 μA/MHz active, 0.60 μA RTC+LVD), and targeting industrial control, sensor nodes, and appliance HMI.

For engineers reviewing the R5F104BDAFP#X0 datasheet, R5F104BDAFP#X0 pinout, R5F104BDAFP#X0 application, or R5F104BDAFP#X0 equivalent, key selection criteria include its 32-pin LQFP-0.8 mm pitch package, industrial-grade -40°C to +85°C operation (D-grade), integrated 10-bit 16-channel ADC, dual UART/LIN support, and hardware DTC/ELC for deterministic peripheral coordination.

Technical Context

The R5F104BDAFP#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz), and includes multiply/divide/accumulate instructions. It integrates a 16-bit Timer Array Unit (TAU) with up to 8 channels, a 12-bit interval timer, real-time clock with calendar/alarm, and watchdog timer.

Peripheral subsystems include 3 CSI/SPI channels, 3 UART/LIN interfaces, 4–10 I²C channels, 8–20-channel 10-bit ADC with internal 1.45 V reference and temperature sensor, and an 8-bit DAC with real-time output capability - all managed via Event Link Controller (ELC) and Data Transfer Controller (DTC) for autonomous event-driven operation without CPU intervention.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, JEDEC standard PLQP0032GB-A footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F104BDAFP#X0, R5F104BEAFP#X0 offers headroom for feature-rich firmware while maintaining identical pinout and thermal profile, whereas R5F104BDGFP#X0 trades package compatibility for extended temperature range - making the former ideal for scalability and the latter for harsh-environment reliability.

Availability

R5F104BDAFP#X0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and home appliance HMI requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F104BDAFP#X0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, and power management solutions for industrial, automotive, and IoT markets.

The RL78/G14 product line delivers true low-power performance for general-purpose embedded applications, emphasizing energy efficiency, integration density, and toolchain maturity for rapid development of cost-sensitive industrial controls.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104BDAFP#X0?

The R5F104BDAFP#X0 operates at up to 32 MHz with a measured performance of 44 DMIPS. This rating reflects its RL78 CPU core's 3-stage pipeline efficiency and instruction mix execution capability, validated per EEMBC benchmarks. The high-speed on-chip oscillator supports ±1.0% accuracy across 1.8–5.5 V and -20°C to +85°C, ensuring stable timing without external crystals in many applications.

Does the R5F104BDAFP#X0 support background data flash rewriting while executing code from main flash memory?

Yes, the R5F104BDAFP#X0 supports Background Operation (BGO) for data flash memory. This allows the CPU to execute instructions from program flash while simultaneously erasing or writing to the 4 KB data flash area. The feature is essential for applications requiring non-volatile parameter storage (e.g., calibration data or device configuration) without interrupting real-time tasks or introducing latency spikes.

What are the key low-power modes supported by the R5F104BDAFP#X0, and what is the typical current draw in each?

The R5F104BDAFP#X0 supports HALT, STOP, and SNOOZE modes. In active mode at 32 MHz, it draws 66 μA/MHz. In STOP mode with only RTC and LVD enabled, it consumes 0.60 μA - verified at VDD = 3.0 V and TA = 25°C. HALT mode achieves ~1.2 μA with main clocks stopped but RAM retained. These values are measured per Renesas R01DS0053EJ0340 Rev. 3.40, Section 1.1.

How many UART/LIN interfaces does the R5F104BDAFP#X0 integrate, and are they fully independent?

The R5F104BDAFP#X0 integrates three independent UART/LIN channels (UART0, UART1, UART2), each with dedicated baud rate generators, FIFO buffers, and LIN-specific features such as sync-break detection and checksum calculation. UART0 supports on-chip debug (TOOLRxD/TOOLTxD), while UART1 and UART2 are fully available for application use - enabling simultaneous host communication, sensor bridging, and LIN network management.

Is the R5F104BDAFP#X0 pin-compatible with other RL78/G14 variants in the same 32-pin LQFP package?

Yes, all RL78/G14 devices in the 32-pin LQFP-0.8 mm pitch package (e.g., R5F104AAFP#X0 through R5F104BGFP#X0) share identical pinouts and electrical characteristics. This allows direct substitution within the same memory/feature tier (e.g., 48 KB flash variants) without PCB redesign. However, firmware must be validated for peripheral register mapping differences between sub-families (e.g., G13 vs G14).