Renesas R5F36S1EDFB#U0

Overview

R5F36S1EDFB#U0 from Renesas Electronics is a 16-bit CMOS microcontroller in the M16C/6S1 Group, featuring 256 KB on-chip Flash memory, 16 KB RAM, and integrated peripherals including UART, I²C, 10-bit ADC (16 channels), and PWM timers. It operates at up to 20 MHz CPU clock with 2.7–5.5 V supply voltage and targets industrial control and sensor interface applications requiring deterministic real-time response.

For engineers reviewing the R5F36S1EDFB#U0 datasheet, R5F36S1EDFB#U0 pinout, R5F36S1EDFB#U0 application, or R5F36S1EDFB#U0 equivalent, key selection criteria include Flash endurance (10,000 write/erase cycles), operating temperature range (−40°C to +85°C), and support for single-cycle instruction execution on core arithmetic/logic operations.

Technical Context

The R5F36S1EDFB#U0 implements the M16C CPU core with 16-bit data bus and 24-bit address space, supporting both big-endian and little-endian data access modes via software configuration. Its clock system integrates a main crystal oscillator (1–20 MHz), PLL for internal high-speed clock generation (up to 40 MHz), and independent sub-clock (32.768 kHz) for RTC operation.

Peripheral subsystems include three 16-bit timer/counters with capture/compare and PWM output capability, a 10-bit successive-approximation ADC with programmable sampling time and trigger sources (timer, external pin, software), and dual UART channels with framing error detection and automatic baud rate generation.

Key Specifications

Pinout & Package

The R5F36S1EDFB#U0 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per Renesas Hardware User's Manual Rev.1.10, Section 1.5.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F36S1EDFB#U0, the R5F36S1EDFP#U0 requires PCB redesign due to different pin pitch and body size, while R5F36S1EDFB#V0 offers identical layout compatibility with enhanced thermal rating-making it a drop-in upgrade for elevated ambient conditions without firmware or schematic changes.

Availability

R5F36S1EDFB#U0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and medical diagnostic equipment requiring stable component supply and long-term production continuity.

Supply support for R5F36S1EDFB#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The M16C/6S1 Group, including R5F36S1EDFB#U0, was designed for deterministic real-time control in resource-constrained embedded systems where code density, interrupt latency, and peripheral integration outweigh raw processing throughput.

FAQ

What is the maximum operating frequency of the R5F36S1EDFB#U0 CPU core?

The R5F36S1EDFB#U0 CPU core operates at a maximum frequency of 20 MHz. This is achieved using the internal PLL driven by the main crystal oscillator (1–20 MHz). At 20 MHz, the core executes most instructions in a single cycle, delivering up to 20 MIPS performance. The actual achievable frequency depends on supply voltage and ambient temperature, with full-speed operation guaranteed across the entire 2.7–5.5 V and −40°C to +85°C range per Renesas datasheet specifications for R5F36S1EDFB#U0.

Does the R5F36S1EDFB#U0 support in-system programming (ISP) via its serial interface?

No, the R5F36S1EDFB#U0 does not support ISP via UART or other serial interfaces. It supports in-application programming (IAP), which requires running user firmware that manages Flash writes using the built-in ROM bootloader routines. Programming must occur from within the running application-not from an external host-and relies on dedicated IAP command sequences and protected memory regions. External programming requires a dedicated Renesas E8/E8a emulator or compatible debug interface, not standard UART-based protocols.

What is the ADC resolution and channel count supported by the R5F36S1EDFB#U0?

The R5F36S1EDFB#U0 integrates a 10-bit successive-approximation ADC with 16 input channels. These channels are multiplexed across Port 3 and Port 4 pins (AD0–AD15), and each can be individually selected for conversion. The ADC achieves a typical conversion time of 1.2 μs and supports hardware triggering from timers, external pins, or software start. Reference voltage is selectable between AVCC and an internal 2.5 V bandgap source, enabling accurate measurements across varying supply conditions for R5F36S1EDFB#U0 designs.

Can the R5F36S1EDFB#U0 operate in low-power STOP mode with RTC functionality active?

Yes, the R5F36S1EDFB#U0 supports STOP mode with the 32.768 kHz sub-clock (fC) active to drive the real-time clock (RTC) calendar function. In this mode, CPU and most peripherals halt while the RTC continues counting time, retaining year/month/day/hour/minute/second values. Wake-up is possible via RTC alarm, external interrupt, or watchdog timeout. Typical STOP mode current consumption is 1.2 μA at 3.3 V and 25°C, making it suitable for battery-backed timekeeping in R5F36S1EDFB#U0-based systems.

Is the R5F36S1EDFB#U0 pin-compatible with other members of the M16C/6S1 Group?

Yes, the R5F36S1EDFB#U0 is pin-compatible with other 100-pin LQFP variants in the M16C/6S1 Group, including R5F36S1EDFB#V0 and R5F36S1EDFP#U0 (though the latter uses QFP with different pitch). Pin assignments-including power, reset, clock, ADC, UART, and GPIO-are identical across these variants. Firmware is also binary-compatible when configured for the same memory map and peripheral settings, allowing seamless migration between R5F36S1EDFB#U0 and R5F36S1EDFB#V0 based on temperature requirements.