Renesas R5F1036AASP#55

Overview

R5F1036AASP#55 from Renesas Electronics is a 20-pin LSSOP ultra-low-power 16-bit RL78/G12 microcontroller designed for cost-sensitive consumer applications. It features 2 KB code flash, 256 B RAM, 10-bit A/D converter with 8 input channels, 4-channel 16-bit timer (TAU0), and single UART interface - operating across 1.8–5.5 V at –40°C to +85°C for battery-powered remote controls and smart home sensors.

For engineers reviewing the R5F1036AASP#55 datasheet, R5F1036AASP#55 pinout, R5F1036AASP#55 application, or R5F1036AASP#55 equivalent, key selection considerations include its absence of data flash memory, lack of DMA and safety functions (CRC, RAM/SFR guard), reduced serial peripheral count versus R5F102 variants, and ±5.0% high-speed on-chip oscillator accuracy over full temperature range.

Technical Context

The R5F1036AASP#55 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting minimum instruction execution time of 0.04167 µs at 24 MHz (high-speed on-chip oscillator) and address space up to 1 MB. It uses HALT, STOP, and SNOOZE low-power modes to achieve 63 µA/MHz active current consumption.

Its peripheral set includes one UART channel (RxD0/TxD0), one simplified SPI (CSI00), no simplified I²C, watchdog timer, 12-bit interval timer, and programmable clock/buzzer output (PCLBUZ0). All I/O pins support TTL input buffer, N-ch open-drain configuration, and 1.8/2.5/3.0 V interface compatibility.

Key Specifications

Pinout & Package

Package: 20-pin plastic LSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, JEDEC standard PLSP0020JB-A footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1026AASP#55, the R5F1036AASP#55 trades data flash, safety features, and tighter oscillator tolerance for lower unit cost and smaller die area; compared with R5F10368ASP#55, it offers identical functionality at reduced memory capacity - making it optimal for minimal-footprint, fixed-function designs.

Availability

R5F1036AASP#55 is available at Aetrix Electronics and suitable for wireless remote controls, smart thermostat sensor nodes, and USB-C power monitors requiring stable component supply across consumer electronics production cycles.

Supply support for R5F1036AASP#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 Corporation 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 consumer devices - emphasizing energy efficiency, integrated analog, and minimal external component count.

FAQ

What is the maximum operating frequency of the R5F1036AASP#55?

The R5F1036AASP#55 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. This yields a minimum instruction execution time of 0.04167 µs. External crystal operation is limited to 20 MHz (1.0–20.0 MHz range) under 2.7–5.5 V supply conditions. The R5F1036AASP#55 does not support frequencies above 24 MHz in any configuration.

Does the R5F1036AASP#55 include data flash memory?

No, the R5F1036AASP#55 does not include data flash memory. This is a defining distinction from the R5F102x series. The R5F1036AASP#55 provides only 2 KB of code flash memory and 256 B of RAM. Data storage must be implemented externally or via EEPROM emulation in code flash - which reduces available program space and write endurance.

What are the key differences between R5F1036AASP#55 and R5F1026AASP#55?

The R5F1036AASP#55 omits data flash memory, DMA controller, CRC calculation unit, RAM/SFR guard functions, and simplified I²C interface present in the R5F1026AASP#55. Its high-speed on-chip oscillator accuracy is ±5.0% (vs. ±1.0% for R5F1026AASP#55), and it supports only one simplified SPI channel instead of two. These reductions lower cost and power but limit firmware update capability and peripheral flexibility.

Which development tools support the R5F1036AASP#55?

The R5F1036AASP#55 is supported by Renesas' CS+ IDE, e² studio (with GCC-RL78 toolchain), and the Renesas Flash Programmer. Debugging uses the on-chip debug interface via P40 (TOOL0) and P125 (RESET) pins - no external debugger is required for basic programming and breakpoint debugging. Evaluation is possible using the Renesas Starter Kit for RL78/G12 (YRDKRL78G12).

Can the R5F1036AASP#55 operate from a 1.8 V supply?

Yes, the R5F1036AASP#55 is fully specified to operate from 1.8 V to 5.5 V across its entire temperature range (–40°C to +85°C). At 1.8 V, the maximum allowed high-speed on-chip oscillator frequency is 8 MHz, and external crystal operation is limited to 1.0–8.0 MHz. All I/O pins maintain TTL-compatible thresholds and 1.8 V interface capability without level shifters.