Renesas R5F212H1SNSP#W4

Overview

R5F212H1SNSP#W4 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in 20-pin LSSOP package, featuring 4 KB Flash ROM, 256 bytes RAM, 8-bit timers (RA, RB, RE, RF), dual UART interfaces, hardware LIN module, and voltage detection circuitry. It operates at up to 8 MHz (2.7–5.5 V) and targets low-power embedded control in electric meters and appliance subsystems.

For engineers reviewing the R5F212H1SNSP#W4 datasheet, R5F212H1SNSP#W4 pinout, R5F212H1SNSP#W4 application, or R5F212H1SNSP#W4 equivalent, key selection considerations include its N-version temperature range (−20°C to +85°C), integrated comparator inputs (VCMP1/VCMP2), real-time clock timer RE, and dual serial interface support (UART0 + UART2) - all confirmed for this exact part number.

Technical Context

The R5F212H1SNSP#W4 implements the R8C/Tiny CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map allocates 4 KB Flash (0F000h–0FFFFh), 256 bytes RAM (00400h–004FFh), and SFRs in 00000h–002FFh, supporting single-chip operation across 1 Mbyte address space.

This MCU integrates four independent timers: Timer RA (8-bit, event counter/pulse width measurement), Timer RB (8-bit, PWM output), Timer RE (8-bit real-time clock), and Timer RF (16-bit input capture/output compare). It also includes two comparators shared with voltage monitors, dual UART channels, and hardware LIN bus support via UART0 and Timer RA.

Key Specifications

Pinout & Package

Package: 20-pin LSSOP (PLSP0020JB-A), 0.65 mm pitch, body size 7.6 × 4.4 mm, moisture sensitivity level (MSL) 3 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F212H2SNSP and R5F212H1SDSP, the R5F212H1SNSP#W4 offers the most cost-effective balance of memory, peripherals, and temperature rating for consumer-grade embedded control - delivering full R8C/2H functionality without over-specification.

Availability

R5F212H1SNSP#W4 is available at Aetrix Electronics and suitable for smart metering, home appliance control, office equipment, and audio system design requiring stable component supply and long-term production continuity.

Supply support for R5F212H1SNSP#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 consumer markets.

The R8C/2H Group, including R5F212H1SNSP#W4, was designed for cost-sensitive, low-power embedded control applications demanding integrated peripherals, robust noise immunity, and compact footprint - especially in metering and white goods.

FAQ

What is the maximum system clock frequency supported by the R5F212H1SNSP#W4?

The R5F212H1SNSP#W4 supports a maximum system clock frequency of 8 MHz when operating within the 2.7–5.5 V supply range. At lower voltages (2.2–5.5 V), the maximum rated frequency reduces to 4 MHz to ensure timing margin and reliability. This specification is explicitly defined in Table 1.1 of the R8C/2H Group datasheet (REJ03B0217-0100).

Does the R5F212H1SNSP#W4 include a real-time clock (RTC) function?

Yes, the R5F212H1SNSP#W4 includes Timer RE - an 8-bit timer configured specifically for real-time clock operation, capable of counting seconds, minutes, hours, and days of week. It can run from the 32 kHz sub-clock (XCIN/XCOUT) during low-power modes, enabling timekeeping without waking the CPU core.

Is the R5F212H1SNSP#W4 pin-compatible with other R8C/2H Group MCUs?

Yes, the R5F212H1SNSP#W4 shares the identical 20-pin LSSOP (PLSP0020JB-A) package and pin assignment with all R8C/2H Group variants, including R5F212H2SNSP and R5F212H1SDSP. Pin functions, electrical characteristics, and peripheral mappings are consistent across the group, enabling drop-in replacement where memory or temperature grade permits.

What debug capabilities does the R5F212H1SNSP#W4 provide?

The R5F212H1SNSP#W4 supports on-chip debug via dedicated debug interface pins, allowing full breakpoint, step-through, and register inspection functionality. It also includes on-board flash rewrite capability, enabling field firmware updates without external programming hardware - a feature confirmed in the Flash Memory section of the R8C/2H Group datasheet.

Can the R5F212H1SNSP#W4 operate from a 3.3 V supply?

Yes, the R5F212H1SNSP#W4 is fully specified for operation at 3.3 V, which falls within its 2.2–5.5 V supply range. At 3.3 V, it supports up to 4 MHz system clock (minimum instruction time 250 ns) and achieves 23 µA wait-mode and 0.7 µA stop-mode current - making it well-suited for battery-backed or low-voltage industrial applications.