Renesas R5F21296KSP#W4

Overview

R5F21296KSP#W4 from Renesas Electronics is a 16-bit R8C/29 Group single-chip microcontroller with 32 KB program flash, 1.5 KB RAM, and dual 1 KB data flash blocks. It features an 89-instruction R8C CPU core, 10-bit 4-channel ADC, hardware LIN module (using Timer RA and UART0), and operates from -40°C to +125°C. It targets automotive body electronics and industrial control where extended temperature operation and on-chip data retention are required.

For engineers reviewing the R5F21296KSP#W4 datasheet, R5F21296KSP#W4 pinout, R5F21296KSP#W4 application, or R5F21296KSP#W4 equivalent, key selection criteria include its K-version industrial-automotive temperature grade (-40°C to +125°C), dual-block 1 KB data flash endurance (10,000 erase/write cycles), hardware LIN compliance, and 20-pin LSSOP package with verified pin functions including TRCIOA/B/C/D for PWM and input capture.

Technical Context

The R5F21296KSP#W4 implements the R8C CPU core with two register banks, 20-bit program counter, and 11-bit flag register supporting carry, zero, sign, overflow, and interrupt priority level (IPL) flags. Its memory architecture includes 1 Mbyte address space, fixed interrupt vector table at 0FFDCh–0FFFFh, and separate program ROM and data flash regions.

Peripheral integration includes three clock generation circuits (XIN, high-speed/low-speed on-chip oscillators, XCIN/XCOUT for N/D versions only), real-time clock via Timer RE (compare match only in K version), and LIN physical layer support routed through UART0 and Timer RA - all confirmed for the R8C/29 Group and explicitly applicable to R5F21296KSP#W4 per product tables.

Key Specifications

Pinout & Package

20-pin LSSOP package (PLSP0020JB-A) with exposed pad not electrically connected; 0.65 mm lead pitch; body size 7.6 × 4.4 mm; maximum height 1.7 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21296JSP#W4, the R5F21296KSP#W4 adds guaranteed operation up to +125°C; compared with R5F21286KSP#W4, it provides integrated dual-block data flash for robust parameter storage - both differences directly impact thermal design margins and firmware update architecture.

Availability

R5F21296KSP#W4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial temperature monitoring systems, and smart appliance motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21296KSP#W4 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 automotive, industrial, and IoT markets.

The R8C/29 Group, including R5F21296KSP#W4, was designed for cost-sensitive, thermally demanding embedded applications requiring integrated LIN, analog sensing, and reliable data retention - particularly in automotive body electronics and industrial controls.

FAQ

What is the maximum operating frequency and corresponding supply voltage for R5F21296KSP#W4?

The R5F21296KSP#W4 supports a maximum operating frequency of 16 MHz at VCC = 3.0 to 5.5 V, as specified for K-version devices in Table 1.2. This corresponds to a minimum instruction execution time of 62.5 ns. Operation at higher frequencies (e.g., 20 MHz) is not supported for the K version - only N/D/J versions allow 20 MHz operation.

Does R5F21296KSP#W4 include hardware support for LIN communication?

Yes, R5F21296KSP#W4 integrates a hardware LIN module compliant with LIN 2.0/2.1 standards. It uses UART0 for serial framing and Timer RA for baud rate generation and synchronization, eliminating the need for external LIN transceivers in basic slave-node implementations per R8C/29 Group documentation.

What is the endurance specification for the data flash in R5F21296KSP#W4?

The R5F21296KSP#W4 includes two independent 1 KB data flash blocks with a guaranteed endurance of 10,000 erase/write cycles each, as documented in Table 1.2 for the R8C/29 Group. This exceeds standard program flash endurance (1,000 cycles) and enables reliable field-updatable parameter storage.

Can R5F21296KSP#W4 operate using an external 32.768 kHz crystal?

No - the XCIN/XCOUT clock circuit required for 32.768 kHz crystal operation is only available on N and D versions of the R8C/29 Group, as explicitly noted in Tables 1.1, 1.2, and Figure 1.4. The K version (including R5F21296KSP#W4) does not support XCIN/XCOUT functionality.

What package type and pin count does R5F21296KSP#W4 use?

R5F21296KSP#W4 uses a 20-pin molded-plastic LSSOP package designated PLSP0020JB-A, with 0.65 mm lead pitch and dimensions of 7.6 mm × 4.4 mm × 1.7 mm max height. Pin functions are fully documented in Table 1.5 and Figure 1.4 of the R8C/29 Group datasheet.