Renesas R5F211A2NP#U0

Overview

R5F211A2NP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1A Group, featuring an R8C/Tiny Series CPU core, 8 KB flash program memory, 512 bytes RAM, and packaged in a 28-pin HWQFN (PWQN0028KA-B). It operates from 2.7–5.5 V, supports 10 MHz/20 MHz clocking, and integrates a 10-bit 4-channel ADC, dual UARTs, I²C, SSU, three timers (8-bit ×2, 16-bit ×1), and LED drive capability - deployed in industrial sensor nodes and appliance control panels.

For engineers reviewing the R5F211A2NP#U0 datasheet, R5F211A2NP#U0 pinout, R5F211A2NP#U0 application, or R5F211A2NP#U0 equivalent, key selection criteria include its 28-pin HWQFN footprint, -20°C to +85°C ambient rating, absence of on-chip data flash (distinguishing it from R8C/1B variants), and support for wait/stop low-power modes with sub-1 µA current draw.

Technical Context

The R5F211A2NP#U0 implements the R8C/Tiny Series 16-bit CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz, 3.0–5.5 V). Its memory architecture provides 1 Mbyte address space, with program ROM mapped in flash and no on-chip data flash - confirming it as an R8C/1A Group member per Renesas documentation.

Peripheral integration includes dual serial interfaces (UART + clock-synchronous I/O), I²C bus interface, 10-bit 4-channel A/D converter with VREF input, three independent timers (Timer X/Z: 8-bit; Timer C: 16-bit with input capture/output compare), and 13 general-purpose I/O pins - all operating under a dual-clock system comprising main crystal/resonator oscillator and high-/low-speed on-chip oscillators.

Key Specifications

Pinout & Package

Packaged in a 28-pin HWQFN (PWQN0028KA-B, 4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad, the R5F211A2NP#U0 features 13 configurable CMOS I/O ports (P1_0–P1_7, P3_3–P3_5, P3_7, P4_5), 3 dedicated input-only pins (P4_2/VREF, P4_6/XIN, P4_7/XOUT), and integrated peripheral signal multiplexing including UART, I²C, SSU, timers, and ADC inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F211A2NP#U0, the R5F211A2SP#U0 reduces I/O and package size at the cost of layout compatibility, while the R5F211B2NP#U0 extends functionality with data flash - neither is pin-compatible nor drop-in; both require firmware validation and hardware review.

Availability

R5F211A2NP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment panels requiring stable component supply and long-term industrial lifecycle support.

Supply support for R5F211A2NP#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 R5F211A2NP#U0 belongs to the R8C/1A Group - a cost-optimized 16-bit MCU family designed for resource-constrained embedded control in appliances, sensors, and human-interface devices.

FAQ

What is the maximum operating frequency of the R5F211A2NP#U0?

The R5F211A2NP#U0 supports a maximum external clock frequency of 20 MHz at VCC = 3.0–5.5 V, achieving a 50 ns minimum instruction execution time. Its on-chip high-speed oscillator is adjustable and usable as a clock source when no external crystal is present - verified in Renesas document REJ03B0144-0140, Table 1.1.

Does the R5F211A2NP#U0 include on-chip data flash memory?

No, the R5F211A2NP#U0 does not include on-chip data flash memory. It belongs to the R8C/1A Group, which contains only program flash ROM (8 KB in this variant). Data flash (1 KB × 2 blocks) is exclusive to the R8C/1B Group - confirmed in Table 1.3 (R5F211A2NP) and Table 1.4 (R5F211B2NP) of the same datasheet.

What package type is used for the R5F211A2NP#U0?

The R5F211A2NP#U0 uses the PWQN0028KA-B package: a 28-pin HWQFN with 4 mm × 4 mm body, 0.5 mm pin pitch, and exposed thermal pad. This differs from SP (LSSOP) and DD (SDIP) variants - explicitly listed in Table 1.3 of REJ03B0144-0140 under "Package Type" for R5F211A2NP.

Which analog input channels are available on the R5F211A2NP#U0?

The R5F211A2NP#U0 provides four 10-bit analog input channels: AN8, AN9, AN10, and AN11 - mapped to P1_0, P1_1, P1_2, and P1_3 respectively. An external reference voltage can be applied via P4_2 (VREF), as specified in Table 1.5 and Figure 1.6 of the R8C/1A Group datasheet.

Can the R5F211A2NP#U0 operate from a 3.3 V supply?

Yes, the R5F211A2NP#U0 operates across 2.7–5.5 V, fully supporting 3.3 V nominal supply. At 10 MHz, it functions down to 2.7 V; at 20 MHz, minimum VCC is 3.0 V - validated in Table 1.1 "Electric Characteristics" and consistent with its use in 3.3 V industrial and appliance systems.