Renesas R5F21367CDFA#U0

Overview

R5F21367CDFA#U0 from Renesas Electronics is a 16-bit R8C CPU core microcontroller designed for embedded control in consumer and industrial applications. It features 48 KB program ROM, 4 KB data flash with background operation (BGO), 10-bit A/D converter (12 channels), dual 8-bit D/A outputs, and operates across −40°C to +85°C. Used in audio equipment and office automation systems requiring low-power real-time control.

For engineers reviewing the R5F21367CDFA#U0 datasheet, R5F21367CDFA#U0 pinout, R5F21367CDFA#U0 application, or R5F21367CDFA#U0 equivalent, key selection criteria include its 64-pin LQFP package (PLQP0064GA-A), −40°C to +85°C industrial temperature grade, integrated LIN hardware module, and support for BGO-enabled firmware updates without halting execution.

Technical Context

The R5F21367CDFA#U0 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit hardware multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte, with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash blocks (1 KB × 4) mapped to 03000h–03FFFh.

Peripheral integration includes Timer RD (16-bit × 2, 6-pin PWM, complementary & reset-synchronous modes), UART0/1/2 with I²C and LIN support, and DTC with 39 activation sources. Clock system comprises XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator.

Key Specifications

Pinout & Package

64-pin LQFP package (PLQP0064GA-A), 10 mm × 10 mm body, 0.5 mm lead pitch, exposed pad not present. Pin functions are software-configurable per peripheral multiplexing - e.g., P0_0–P0_7 serve as analog inputs (AN0–AN7) or D/A outputs (DA1/DA0), while P3_2 supports INT1/INT2 and TRAIO/TRGCLKB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21367CNFA#U0, the R5F21367CDFA#U0 adds industrial temperature resilience without sacrificing power efficiency or peripheral capability; versus R5F21368CDFA#U0, it trades ROM headroom for tighter BOM cost control in volume production.

Availability

R5F21367CDFA#U0 is available at Aetrix Electronics and suitable for audio equipment control, office automation devices, and consumer appliance UI requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F21367CDFA#U0 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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The R8C/36C Group targets cost-sensitive, low-power embedded control applications where integration of LIN, ADC, DAC, and BGO-capable flash reduces system component count and improves field-upgrade reliability.

FAQ

What is the maximum operating frequency of the R5F21367CDFA#U0?

The R5F21367CDFA#U0 supports up to 20 MHz operation when powered at 2.7–5.5 V using the XIN clock source. At lower voltages (1.8–5.5 V), the maximum frequency is 5 MHz. The high-speed on-chip oscillator provides a factory-trimmed 20 MHz option with ±2% accuracy, eliminating need for external crystals in non-critical timing applications. This specification is confirmed in Table 1.2 of the R01DS0018EJ0110 datasheet.

Does the R5F21367CDFA#U0 support in-system programming via its serial interfaces?

Yes, the R5F21367CDFA#U0 supports on-chip debug and in-system programming through its dedicated debug interface, not via UART or I²C. Renesas Flash Development Toolkit (FDT) uses the on-chip debug circuit to reprogram program ROM and data flash without removing the R5F21367CDFA#U0 from the board. Background operation (BGO) allows data flash updates during normal execution, but program ROM writes require CPU halt.

How many independent PWM outputs does the R5F21367CDFA#U0 provide?

The R5F21367CDFA#U0 provides up to 11 independent PWM outputs: Timer RB delivers 1 channel; Timer RC supports 3 pins; Timer RD supports 6 pins in standard or complementary PWM mode. All PWM units are fully configurable for period, duty cycle, polarity, and dead-time insertion - critical for motor control and lighting applications. Pin assignment is verified in Figure 1.3 and Tables 1.5–1.6 of the datasheet.

Is the data flash memory in the R5F21367CDFA#U0 truly EEPROM-emulated?

Yes, the R5F21367CDFA#U0 includes 4 KB of data flash organized as four 1 KB blocks, rated for 10,000 erase/write cycles and supporting background operation (BGO). Unlike standard program flash, data flash can be rewritten during application execution - enabling EEPROM-like parameter storage (e.g., calibration data, user settings) without halting the R5F21367CDFA#U0 or disrupting real-time tasks.

What peripheral modules are shared with the I²C bus on the R5F21367CDFA#U0?

The I²C bus shares physical pins P3_4 (SDA2), P3_5 (SCL2), and P3_7 (SSO) with the Synchronous Serial Unit (SSU). These pins are multiplexed and configured via the PM3 register and IICM bit in the P3 register. When I²C mode is selected, SSU functionality is disabled; switching requires software reconfiguration and does not support concurrent operation. This pin-sharing is documented in Table 1.5 and Section 1.5 of the R01DS0018EJ0110 datasheet.