Renesas R5F1026AASP#X5

Overview

R5F1026AASP#X5 from Renesas Electronics is a 20-pin LSSOP ultra-low-power 16-bit RL78/G12 microcontroller with 16 KB code flash, 2 KB data flash, and 1.5 KB RAM, operating from 1.8 V to 5.5 V at up to 24 MHz (31 DMIPS), featuring integrated 10-bit A/D converter (11 channels), dual CSI/I²C serial interfaces, and DMA controller - deployed in battery-powered sensor nodes and industrial control panels.

For engineers reviewing the R5F1026AASP#X5 datasheet, R5F1026AASP#X5 pinout, R5F1026AASP#X5 application, or R5F1026AASP#X5 equivalent, key selection criteria include its 2 KB on-chip data flash for field firmware updates, ±1.0% high-speed on-chip oscillator accuracy over –20 to +85°C, HALT/STOP/SNOOZE low-power modes, and CRC hardware acceleration for safety-critical embedded firmware integrity checks.

Technical Context

The R5F1026AASP#X5 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and configurable instruction execution time (0.04167 µs @ 24 MHz). It integrates a dedicated low-speed on-chip oscillator (15 kHz) for watchdog operation and supports main system clock switching between high-speed on-chip oscillator (1–24 MHz) and external crystal (1–20 MHz).

Its peripheral set includes TAU0 timer array (4-channel 16-bit), SAU0 serial array unit (2-channel CSI + 2-channel I²C), UART0, 12-bit interval timer, window watchdog timer, and on-chip BCD correction circuit - all accessible via peripheral I/O redirection register (PIOR) for flexible pin mapping without PCB redesign.

Key Specifications

Pinout & Package

Package: 20-pin plastic LSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10269ASP#X5 and R5F10268ASP#X5, the R5F1026AASP#X5 delivers maximum on-chip memory headroom (16 KB flash/1.5 KB RAM) for future firmware expansion, real-time OS deployment, and larger cryptographic context buffers - critical for long-lifecycle industrial devices requiring field-upgradable security features.

Availability

R5F1026AASP#X5 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control panels, and portable medical device front-ends requiring stable component supply across multi-year production programs.

Supply support for R5F1026AASP#X5 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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications, with over 40 years of microcontroller innovation.

The RL78/G12 product line targets cost-sensitive, ultra-low-power general-purpose embedded systems - designed specifically for battery-operated sensors, white goods, and industrial HMIs where energy efficiency, integration density, and functional safety features are essential.

FAQ

What is the maximum operating frequency and power consumption of the R5F1026AASP#X5?

The R5F1026AASP#X5 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS performance. Its ultra-low-power design achieves 63 μA/MHz in HALT mode and just 0.52 μA in STOP mode at VDD = 1.8 V. These figures are measured under specified conditions in the R01DS0193EJ0250 datasheet, making the R5F1026AASP#X5 ideal for energy-harvesting and coin-cell-powered applications where runtime longevity is critical.

Does the R5F1026AASP#X5 include on-chip data flash memory, and what is its endurance?

Yes, the R5F1026AASP#X5 integrates 2 KB of on-chip data flash memory rated for 1,000,000 write/erase cycles (typical) across the full VDD range of 1.8 V to 5.5 V. This memory supports background operation (BGO), allowing program execution from code flash while rewriting data flash - enabling seamless firmware updates and parameter logging without system interruption. The R5F1026AASP#X5 data flash is distinct from R5F103-series parts, which omit this feature entirely.

What serial communication interfaces are available on the R5F1026AASP#X5?

The R5F1026AASP#X5 provides two Simplified SPI (CSI) channels, two Simplified I²C channels, and one UART channel - all implemented in the SAU0 serial array unit. Unlike the R5F1036x series, the R5F1026AASP#X5 retains both CSI and I²C functionality, enabling concurrent communication with SPI-based sensors (e.g., accelerometers) and I²C peripherals (e.g., EEPROMs or temperature sensors) without multiplexing or external bus switches.

How does the R5F1026AASP#X5 support functional safety requirements?

The R5F1026AASP#X5 includes hardware-level safety features such as RAM guard, SFR guard, and CRC calculation accelerator - all documented in the R01DS0193EJ0250 datasheet. These features detect and prevent unintended memory corruption during runtime, enabling compliance with IEC 61508 SIL-2 and ISO 13849 PL d requirements when properly integrated into system-level safety architecture. The R5F1026AASP#X5 does not include lockstep cores or ASIL-certified qualification, but its guards and CRC engine form foundational elements for self-test and error detection routines.

What is the pin configuration and package type of the R5F1026AASP#X5?

The R5F1026AASP#X5 uses a 20-pin plastic LSSOP package (4.4 × 6.5 mm, 0.65-mm pitch) with exposed pad not present. Pin functions include 11 analog inputs (ANI0–ANI3, ANI16–ANI22), dual CSI/I²C interfaces mapped to P10–P12 and P60–P61, and key return inputs KR0–KR5 on P40, P137, and P121–P125. The "#X5" suffix denotes embossed tape packaging - confirmed in Figure 1-1 and Table 1-1 of the R01DS0193EJ0250 datasheet.