Renesas R5F211A4DSP#U0

Overview

R5F211A4DSP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1A Group, featuring an R8C/Tiny Series CPU core, 16 KB flash program memory, 1 KB RAM, and operating across -40°C to +85°C. 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 capability on four I/O pins - deployed in consumer appliance control and industrial sensor interfaces.

For engineers reviewing the R5F211A4DSP#U0 datasheet, R5F211A4DSP#U0 pinout, R5F211A4DSP#U0 application, or R5F211A4DSP#U0 equivalent, key selection criteria include its 20-pin LSSOP package (PLSP0020JB-A), 2.7–5.5 V supply range, 50 ns minimum instruction cycle at 20 MHz, integrated voltage detection and power-on reset, and support for wait/stop low-power modes with sub-µA current draw.

Technical Context

The R5F211A4DSP#U0 implements the R8C/Tiny Series CPU core with 89 fundamental instructions and a 1 Mbyte linear address space. Its dual clock system includes a main crystal/resonator oscillator (XIN/XOUT) and an adjustable high-speed on-chip oscillator, both supported by oscillation stop detection logic.

Peripheral integration centers on mixed-signal control: a 10-bit A/D converter with four analog inputs (AN8–AN11), dedicated timer input capture/output compare (TCIN, TZOUT, CNTR0), and multi-protocol serial connectivity - including UART, clock-synchronous serial I/O, SSU with chip select, and I²C bus (SCL/SDA) - all mapped to shared pins in the 20-pin LSSOP footprint.

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 R5F211A4SP and R5F211B4DSP, the R5F211A4DSP#U0 provides the optimal balance of industrial temperature range, sufficient program memory, and absence of redundant data flash - reducing cost and complexity where persistent user data storage is not needed.

Availability

R5F211A4DSP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor interface, and office equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F211A4DSP#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 IoT markets.

The R8C/1A Group, including R5F211A4DSP#U0, was designed for cost-sensitive, low-power embedded control in appliances and industrial equipment - emphasizing integration, thermal robustness, and ease of migration within the R8C family.

FAQ

What is the maximum operating frequency of the R5F211A4DSP#U0?

The R5F211A4DSP#U0 supports a maximum external clock frequency of 20 MHz when powered at 3.0–5.5 V, delivering a minimum instruction execution time of 50 ns. Its internal high-speed on-chip oscillator is adjustable from 1 MHz to 20 MHz and does not require external components - enabling rapid wake-up from low-power modes without crystal stabilization delay.

Does the R5F211A4DSP#U0 include an integrated power-on reset circuit?

Yes, the R5F211A4DSP#U0 features an on-chip power-on reset (POR) circuit that asserts reset until VCC reaches a valid operating level and stabilizes. This eliminates the need for external POR ICs in most designs. The device also includes an on-chip voltage detection (LVD) circuit with programmable trip points to trigger reset or interrupt on brown-out conditions.

Which package type is used for the R5F211A4DSP#U0?

The R5F211A4DSP#U0 is supplied in the 20-pin molded-plastic LSSOP package designated PLSP0020JB-A. This package measures 7.6 mm × 4.4 mm with 0.65 mm lead pitch and is RoHS-compliant. Pin assignments match those shown in Figure 1.4 of the R8C/1A Group hardware manual, including dedicated functions for XIN, RESET, and multi-function I/O such as P1_0 through P1_7.

Can the R5F211A4DSP#U0 perform analog-to-digital conversion?

Yes, the R5F211A4DSP#U0 integrates a 10-bit successive-approximation A/D converter with four input channels (AN8–AN11), each accessible via dedicated pins on Port P1. Conversion is software-triggered or auto-triggered by timer events, with configurable sample-and-hold timing. The reference voltage (VREF) is externally supplied on pin P4_2, supporting ratiometric or absolute measurement configurations.

Is the R5F211A4DSP#U0 pin-compatible with other R8C/1A Group devices?

Yes, all R8C/1A Group devices in the same package variant - including R5F211A1DSP, R5F211A2DSP, R5F211A3DSP, and R5F211A4DSP - share identical pinouts and electrical characteristics for the PLSP0020JB-A (LSSOP) package. Firmware and hardware designs can scale across memory variants without layout changes, provided peripheral usage remains within the selected device's resource limits.