Renesas R5F211A3DSP#U0

Overview

R5F211A3DSP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1A Group, featuring an R8C/Tiny Series CPU core, 12 KB on-chip flash ROM, 768 bytes RAM, and operating 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, clock-synchronous serial I/O, I²C bus interface, and LED drive ports. It targets cost-sensitive embedded control in household appliances and industrial sensors.

For engineers reviewing the R5F211A3DSP#U0 datasheet, R5F211A3DSP#U0 pinout, R5F211A3DSP#U0 application, or R5F211A3DSP#U0 equivalent, key selection considerations include its -40°C to +85°C industrial temperature grade (D suffix), 20-pin LSSOP package (PLSP0020JB-A), integrated voltage detection and power-on reset, and absence of data flash-distinguishing it from R8C/1B Group variants.

Technical Context

The R5F211A3DSP#U0 implements the R8C/Tiny Series 16-bit CPU with 89 fundamental instructions and a 1 Mbyte linear address space. Its dual clock system includes a main crystal/resonator oscillator (XIN/XOUT) and a high-speed on-chip oscillator with frequency adjustment, plus low-speed on-chip oscillator for stop-mode operation.

Peripheral integration centers on real-time control: Timer C provides input capture and output compare for motor timing; UART and I²C support sensor communication; four analog inputs (AN8–AN11) feed the 10-bit A/D converter with internal VREF reference; and four dedicated LED drive ports (P1_0–P1_3) enable direct display interfacing without external drivers.

Key Specifications

Pinout & Package

Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 7.6 mm × 4.4 mm body, 0.65 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F211A3DSP#U0, R5F211A3SP lacks industrial temperature support but offers identical functionality at lower cost, while R5F211B3DSP adds data flash for configuration retention-making R5F211A3DSP#U0 optimal for fixed-function, thermally stable embedded control where flash endurance isn't needed.

Availability

R5F211A3DSP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, office equipment UIs, and portable medical devices requiring stable component supply across production lifecycles.

Supply support for R5F211A3DSP#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 R8C/1A Group, including R5F211A3DSP#U0, was designed for cost-optimized, low-power embedded control in consumer and industrial equipment-emphasizing integration of timing, analog, and communication peripherals in compact packages.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F211A3DSP#U0?

R5F211A3DSP#U0 operates at up to 20 MHz with VCC = 3.0–5.5 V, or up to 10 MHz with VCC = 2.7–5.5 V. The minimum instruction execution time is 50 ns at 20 MHz and 100 ns at 10 MHz. These ratings are guaranteed across its -40°C to +85°C industrial temperature range, making R5F211A3DSP#U0 suitable for timing-critical control loops in variable environmental conditions.

Does R5F211A3DSP#U0 include data flash memory?

No, R5F211A3DSP#U0 belongs to the R8C/1A Group and contains only program flash ROM (12 KB). It does not include data flash. For data flash capability, consider the R8C/1B Group part R5F211B3DSP, which adds 2 KB of data flash (10,000 write cycles) while retaining identical package, pinout, and temperature rating as R5F211A3DSP#U0.

Which package type is used by R5F211A3DSP#U0, and what are its key mechanical features?

R5F211A3DSP#U0 uses the PLSP0020JB-A package: a 20-pin molded-plastic LSSOP with 0.65 mm lead pitch, 7.6 mm × 4.4 mm body size, and no exposed thermal pad. This package supports standard surface-mount reflow processes and is footprint-compatible with other R8C/1A Group devices in the same family, enabling design reuse across performance tiers.

How many analog input channels does the A/D converter in R5F211A3DSP#U0 support, and what is its resolution?

R5F211A3DSP#U0 integrates a single 10-bit successive-approximation A/D converter with four input channels: AN8, AN9, AN10, and AN11. These map to P1_0, P1_1, P1_2, and P1_3 respectively. The converter uses an internal reference or external VREF (applied to P4_2) and supports conversion times down to 10.24 µs per sample, enabling real-time sensor monitoring in closed-loop systems.

What peripheral interfaces are available on R5F211A3DSP#U0 for connecting to external sensors or displays?

R5F211A3DSP#U0 provides UART (TXD0/RXD0), I²C bus (SCL/SDA on P3_5/P3_4), clock-synchronous serial I/O (SSI00/SSI01), and a dedicated SSU interface (SCS/SSCK/SSO). These allow direct connection to digital temperature sensors (e.g., TMP102), EEPROMs, character LCDs, and multi-drop sensor networks-all without external level shifters or protocol translators.