Renesas R5F10269ASM#55

Overview

R5F10269ASM#55 from Renesas is a 20-pin RL78/G12 16-bit microcontroller with 12 KB code flash, 2 KB data flash, and 768 B RAM, operating at 1.8–5.5 V and delivering 31 DMIPS at 24 MHz. It integrates an ultra-low-power CPU core (63 μA/MHz), 10-bit 11-channel ADC, dual CSI/I²C serial interfaces, UART, DMA controller, and hardware CRC - deployed in battery-powered sensor nodes and industrial control panels.

For engineers reviewing the R5F10269ASM#55 datasheet, R5F10269ASM#55 pinout, R5F10269ASM#55 application, or R5F10269ASM#55 equivalent, key selection considerations include its TSSOP20 package, -40°C to +85°C industrial-grade temperature range (A-grade), on-chip data flash for firmware-over-the-air updates, and support for low-power STOP/HALT/SNOOZE modes in embedded edge devices.

Technical Context

The R5F10269ASM#55 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, 1 MB address space, and configurable instruction timing (0.04167 µs min @ 24 MHz). Its clock system combines a high-accuracy ±1.0% on-chip oscillator (1–24 MHz) with external crystal support (1–20 MHz) and a dedicated 15 kHz low-speed oscillator for watchdog and interval timing.

Peripheral integration includes two CSI channels (SPI-compatible), two simplified I²C channels, one UART, four 16-bit timer channels with PWM capability, and a 10-bit ADC with internal 1.45 V reference and temperature sensor - all accessible via 18 I/O pins including 2× 6-V-tolerant N-ch open-drain outputs and key interrupt support.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10268ASM#55 and R5F10369ASM#55, the R5F10269ASM#55 uniquely delivers 12 KB code flash with full data flash, DMA, and safety peripherals in the same TSSOP20 footprint - making it optimal for upgradable industrial firmware with deterministic real-time response.

Availability

R5F10269ASM#55 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMIs, energy meter interfaces, and asset tracking modules requiring stable component supply across extended product lifecycles.

Supply support for R5F10269ASM#55 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for automotive, industrial, and IoT markets.

The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications requiring high integration, robustness, and long-term supply stability.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F10269ASM#55?

The R5F10269ASM#55 operates at up to 24 MHz using its high-speed on-chip oscillator, achieving 31 DMIPS performance. This rating is measured under standard conditions (VDD = 2.7–5.5 V, TA = –40 to +85°C) and reflects sustained integer compute throughput usable for real-time control loops and protocol processing in the R5F10269ASM#55.

Does the R5F10269ASM#55 support background data flash rewriting while executing code from main flash?

Yes, the R5F10269ASM#55 supports Background Operation (BGO) for data flash, allowing the CPU to execute instructions from code flash while simultaneously erasing or programming the 2 KB data flash memory. This capability is confirmed in the RL78/G12 datasheet (R01DS0193EJ0250) and enables seamless firmware updates and parameter logging without halting application execution in the R5F10269ASM#55.

What are the key differences between the R5F10269ASM#55 and the R5F10369ASM#55?

The R5F10269ASM#55 includes 2 KB data flash, ±1% oscillator accuracy, DMA controller, hardware CRC, and RAM/SFR guard - features absent in the R5F10369ASM#55. Both share the same 12 KB code flash, TSSOP20 package, and core peripherals, but the R5F10269ASM#55 targets applications requiring field-upgradable firmware and enhanced reliability, unlike the R5F10369ASM#55's cost-optimized profile.

Which analog reference voltages are available internally for the ADC in the R5F10269ASM#55?

The R5F10269ASM#55 provides an internal 1.45 V reference voltage (AVREF+) and uses AVREFM (analog reference minus) as the low-side reference - both accessible via dedicated pins P20 and P21. These references are explicitly specified in the RL78/G12 datasheet for use with the 10-bit 11-channel ADC, enabling accurate ratiometric measurements without external components in the R5F10269ASM#55.

What low-power modes does the R5F10269ASM#55 support, and what are their typical current draws?

The R5F10269ASM#55 supports HALT (63 μA/MHz), STOP (0.52 μA), and SNOOZE modes. STOP mode disables the CPU and most peripherals while retaining RAM and register contents; HALT reduces clock frequency dynamically; SNOOZE allows selected peripherals (e.g., ADC, UART) to operate autonomously. These values are measured at VDD = 3.3 V, TA = 25°C, and are documented in the RL78/G12 electrical specifications for the R5F10269ASM#55.