Renesas R5F211B2NP#U0

Overview

R5F211B2NP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1B Group, featuring an R8C/Tiny Series CPU core, 8 KB program flash ROM, 1 KB × 2 data flash memory, 512 bytes RAM, and operation at up to 20 MHz (50 ns min. instruction time). It integrates a 10-bit 4-channel A/D converter, three timers (8-bit ×2, 16-bit ×1), UART, I²C bus interface, SSU, and LED drive ports - deployed in consumer appliance control and industrial sensor nodes.

For engineers reviewing the R5F211B2NP#U0 datasheet, R5F211B2NP#U0 pinout, R5F211B2NP#U0 application, or R5F211B2NP#U0 equivalent, key selection criteria include its 28-pin HWQFN (PWQN0028KA-B) package, -20°C to +85°C ambient rating, on-chip voltage detection and power-on reset, and dual on-chip oscillators with frequency adjustment capability.

Technical Context

The R5F211B2NP#U0 implements the R8C/Tiny Series 16-bit CPU core with 89 fundamental instructions and 1 Mbyte linear address space. Its memory subsystem includes 8 KB program flash (1,000 erase/write cycles) and two independent 1 KB data flash blocks (10,000 cycles), enabling robust firmware updates and nonvolatile parameter 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 supporting input capture/output compare (Timer C), PWM generation (Timer Z), and prescaled counting (Timers X/Z), plus dual serial interfaces - one UART and one configurable channel supporting clock-synchronous I/O, UART, or I²C bus protocol.

Key Specifications

Pinout & Package

Package: 28-pin molded-plastic HWQFN (PWQN0028KA-B), 4.0 mm × 4.0 mm body, 0.5 mm lead pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F211B2NP#U0, the SP variant offers smaller footprint but fewer I/Os, while the DD variant provides extended temperature operation in a through-hole package - both retain identical flash architecture and peripheral sets, enabling firmware reuse across platforms.

Availability

R5F211B2NP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, office equipment, and portable audio devices requiring stable component supply and long-term production continuity.

Supply support for R5F211B2NP#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 automotive, industrial, and IoT markets.

The R5F211B2NP#U0 belongs to the R8C/1B Group - a cost-optimized 16-bit MCU family designed for resource-constrained embedded systems requiring integrated analog peripherals, low-power operation, and field-updatable data storage.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for the R5F211B2NP#U0?

The R5F211B2NP#U0 operates at up to 20 MHz with a supply voltage of 3.0–5.5 V. At 10 MHz, it supports a wider range of 2.7–5.5 V, enabling flexible power design in battery-powered or variable-input applications. This dual-voltage/frequency specification is confirmed in Table 1.2 of the R8C/1B Group datasheet (Rev.1.40).

Does the R5F211B2NP#U0 include on-chip debug support, and what interface is used?

Yes, the R5F211B2NP#U0 supports on-chip debugging via the single-wire background debug mode (BDM) using the RESET pin. This allows full breakpoint, step-through, and memory inspection capabilities without dedicated debug pins - simplifying PCB layout and reducing pin count overhead compared to JTAG-based MCUs.

How many A/D converter channels does the R5F211B2NP#U0 support, and what are their input designations?

The R5F211B2NP#U0 integrates a single 10-bit A/D converter with four analog input channels designated AN8, AN9, AN10, and AN11 - mapped to P1_0, P1_1, P1_2, and P1_3 respectively. These pins also serve as key interrupt inputs (KI0–KI3) and LED drive ports, enabling shared pin usage in compact designs.

What is the data flash endurance specification for the R5F211B2NP#U0, and how is it structured?

The R5F211B2NP#U0 contains two independent 1 KB data flash blocks, each rated for 10,000 erase/write cycles. This structure allows wear-leveling across blocks and supports simultaneous read-while-write operations - critical for reliable logging and parameter storage in R5F211B2NP#U0-based systems.

Can the R5F211B2NP#U0 operate without an external crystal, and what clock sources are available?

Yes, the R5F211B2NP#U0 can operate without an external crystal using its on-chip high-speed oscillator (adjustable frequency) or low-speed oscillator. The main clock circuit also supports external ceramic resonators or crystals via XIN/XOUT, providing flexibility for cost-sensitive or space-constrained designs where R5F211B2NP#U0 must balance precision and bill-of-materials simplicity.