Renesas R5F211B4SP#W4

Overview

R5F211B4SP#W4 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1B Group, featuring an R8C/Tiny Series CPU core, 16 KB program flash ROM, 1 KB RAM, and dual 1 KB data flash blocks. It operates at up to 20 MHz (50 ns min. instruction time), supports 10-bit A/D conversion across 4 channels, and integrates UART, I²C, SSU, and three timers (8-bit ×2, 16-bit ×1). It targets embedded control in consumer appliances and industrial sensors.

For engineers reviewing the R5F211B4SP#W4 datasheet, R5F211B4SP#W4 pinout, R5F211B4SP#W4 application, or R5F211B4SP#W4 equivalent, key selection criteria include its 20-pin LSSOP package (PLSP0020JB-A), -20°C to +85°C operating range, on-chip voltage detection and power-on reset, and dual data flash for reliable parameter storage in field-upgradable systems.

Technical Context

The R5F211B4SP#W4 implements the R8C/Tiny CPU core with 89 fundamental instructions and a 1 Mbyte linear address space. Its memory subsystem includes 16 KB of reprogrammable flash ROM and two independent 1 KB data flash blocks rated for 10,000 write/erase cycles-enabling nonvolatile configuration storage without external EEPROM.

Peripheral integration centers on mixed-signal control: a 10-bit A/D converter with four analog inputs (AN8–AN11), three timer modules (Timer X/Z for basic timing, Timer C for input capture/output compare), and dual serial interfaces-one UART plus one configurable channel supporting clock-synchronous I/O, UART, or I²C bus protocol-all sharing pins via function multiplexing on P1 and P3 ports.

Key Specifications

Pinout & Package

Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 7.6 mm × 4.4 mm body, 0.65 mm lead pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F211B4SP#W4, the R5F211B4DSP#W4 adds extended temperature support without changing code or layout, while the R5F211A4SP#W4 removes data flash to lower cost-making both viable alternatives depending on thermal requirements and nonvolatile storage needs.

Availability

R5F211B4SP#W4 is available at Aetrix Electronics and suitable for smart appliance control, industrial sensor nodes, office equipment UI, and home security panels requiring stable component supply over extended production lifecycles.

Supply support for R5F211B4SP#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 industrial, automotive, and IoT markets.

The R8C/1B Group, including R5F211B4SP#W4, was designed for cost-effective, low-power embedded control in consumer and general industrial equipment-emphasizing integrated analog peripherals, flash flexibility, and compact packaging.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F211B4SP#W4?

R5F211B4SP#W4 supports a maximum operating frequency of 20 MHz at VCC = 3.0–5.5 V, and 10 MHz at VCC = 2.7–5.5 V. The minimum instruction execution time is 50 ns under the 20 MHz condition. These ratings are specified in the official Renesas REJ03B0144-0140 datasheet Rev.1.40, and must be observed to ensure reliable flash programming and A/D conversion accuracy.

Does R5F211B4SP#W4 include on-chip debug support for firmware development?

Yes, R5F211B4SP#W4 supports on-chip debugging via the single-wire background debug mode (BDM) using the RESET pin. This allows full breakpoint, step-through, and register inspection capability without requiring additional debug pins-enabling rapid firmware iteration during R5F211B4SP#W4 development on standard evaluation hardware.

How many A/D input channels does R5F211B4SP#W4 provide, and what are their pin assignments?

R5F211B4SP#W4 provides four 10-bit A/D input channels assigned to pins AN8 through AN11, which map to P1_0, P1_1, P1_2, and P1_3 respectively. Each channel supports programmable sampling time and can use either internal or external reference voltage (VREF pin) - a capability confirmed in Table 1.2 and Figure 1.4 of the R5F211B4SP#W4 datasheet.

What is the flash endurance specification for the data flash blocks in R5F211B4SP#W4?

The R5F211B4SP#W4 features two independent 1 KB data flash blocks rated for 10,000 write/erase cycles each, as documented in Table 1.2 of the Renesas datasheet. This endurance enables robust field-updatable parameter storage-such as calibration coefficients or device configuration-without requiring external nonvolatile memory.

Can R5F211B4SP#W4 operate in low-power stop mode, and what is its typical current consumption?

Yes, R5F211B4SP#W4 supports stop mode with typical current consumption of 0.7 µA at VCC = 3.0 V and TA = 25°C, as specified in Table 1.2. In this mode, the CPU and most peripherals halt while retaining RAM content and enabling wake-up via external interrupt or reset-making R5F211B4SP#W4 suitable for battery-powered sensing applications requiring multi-year operation.