Renesas R5F21152SP#U0

Overview

R5F21152SP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller with 8 KB program flash ROM, 1 KB × 2 data flash memory, and 512 bytes RAM, built on silicon gate CMOS process and packaged in 20-pin LSSOP (PLSP0020JB-A). It integrates an 8-bit × 1 Timer X, 8-bit × 1 Timer Z, 16-bit × 1 Timer C with input capture/output compare, 10-bit 4-channel A/D converter, UART/serial I/O, and operates across -20°C to +85°C for electric household appliances and industrial sensor control.

For engineers reviewing the R5F21152SP#U0 datasheet, R5F21152SP#U0 pinout, R5F21152SP#U0 application, or R5F21152SP#U0 equivalent, key selection criteria include its dual-block data flash endurance (10,000 cycles), low-power stop mode (0.7 µA), 20 MHz max clock speed at 3.0–5.5 V, and integrated voltage detection and oscillation stop detection for robust embedded control.

Technical Context

The R5F21152SP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and executes at 50 ns minimum instruction time (20 MHz, 3.0–5.5 V). Its memory architecture provides 1 Mbyte address space, with program ROM mapped from 0C000h–0FFFFh and dual 1 KB data flash blocks at 02400h–02BFFh.

Peripheral integration includes two independent clock generation circuits (main crystal oscillator + high/low-speed on-chip oscillators with frequency adjustment), a 15-bit watchdog timer with prescaler and reset-start selectability, and seven-level priority interrupt system supporting 9 internal, 4 external, and 4 software interrupt sources.

Key Specifications

Pinout & Package

Package: 20-pin plastic molded LSSOP (PLSP0020JB-A), 0.65 mm lead pitch, JEDEC MS-013AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21152DSP#U0, the R5F21152SP#U0 trades extended temperature rating for lower cost in commercial-grade environments; versus R5F21153SP#U0, it offers identical feature set at reduced memory capacity-ideal for cost-optimized, functionally bounded control tasks.

Availability

R5F21152SP#U0 is available at Aetrix Electronics and suitable for electric household appliance control, industrial sensor nodes, and office equipment requiring stable component supply and long-term production continuity.

Supply support for R5F21152SP#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, power, and SoC solutions for industrial, automotive, and consumer markets.

The R8C/15 Group, including the R5F21152SP#U0, was designed for cost-sensitive, low-power embedded control applications in home appliances, office equipment, and general industrial systems-emphasizing integration, reliability, and ease of use.

FAQ

What is the maximum operating frequency of the R5F21152SP#U0?

The R5F21152SP#U0 supports a maximum operating frequency of 20 MHz when powered at 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. At 2.7–5.5 V, the maximum frequency is 10 MHz (100 ns min instruction time). This specification is validated in the official Renesas datasheet REJ03B0102-0200, Rev.2.00.

Does the R5F21152SP#U0 include on-chip debug support?

Yes, the R5F21152SP#U0 includes on-chip debug functionality via the single-wire debug interface using the RESET pin. It supports breakpoints, watchpoints, and register inspection without requiring additional pins. This capability is documented in Section 5.3 of the R8C/15 Group hardware manual and is fully supported by Renesas E1/E20 emulators.

How many A/D converter channels does the R5F21152SP#U0 support, and what is their resolution?

The R5F21152SP#U0 integrates a single 10-bit successive approximation A/D converter with four input channels (AN8–AN11), multiplexed onto P1_0–P1_3. Each conversion completes in 28 µs typical at 20 MHz, and the module supports both software and timer-triggered sampling modes as specified in Table 1.2 of the datasheet.

What is the data flash endurance rating for the R5F21152SP#U0?

The R5F21152SP#U0 features two independent 1 KB data flash blocks (Block A and Block B), each rated for 10,000 program/erase cycles. This endurance is guaranteed under standard operating conditions (VCC = 2.7–5.5 V, TA = –20°C to +85°C) and is distinct from the 1,000-cycle rating of the main program ROM.

Is the R5F21152SP#U0 pin-compatible with other devices in the R8C/15 Group?

Yes, all R8C/15 Group devices-including R5F21152SP#U0, R5F21153SP#U0, and R5F21154SP#U0-share identical 20-pin LSSOP (PLSP0020JB-A) packaging and full pin-to-pin compatibility. Peripheral functions, pin assignments, and electrical characteristics are consistent across the group, enabling scalable memory upgrades without PCB redesign.