Renesas R5F2M122ANSP#U0

Overview

R5F2M122ANSP from Renesas Electronics is an 8 KB Flash, 512-byte RAM R8C/M12A Group 16-bit microcontroller with R8C CPU core, 10-bit × 6-channel A/D converter, UART0 serial interface, and integrated data flash (1 KB × 2 blocks), designed for cost-sensitive embedded control in home appliances and consumer electronics.

For engineers reviewing the R5F2M122ANSP datasheet, R5F2M122ANSP pinout, R5F2M122ANSP application, or R5F2M122ANSP equivalent, key selection criteria include its 20-pin LSSOP package, -20 °C to +85 °C temperature grade, 20 MHz max operating frequency at 2.7–5.5 V, 8 external interrupt inputs, and dual comparator B channels - all critical for resource-constrained timing and analog-sensing applications.

Technical Context

The R5F2M122ANSP implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit hardware multiplier, and multiply-accumulate capability. Its 1 Mbyte address space supports single-chip operation with fixed interrupt vector table at 0FFDCh–0FFFFh.

It integrates three clock sources (XIN oscillator, high-speed on-chip oscillator with frequency adjustment, low-speed on-chip oscillator), programmable wait/stop power modes, and peripheral control via SFRs mapped to 00000h–002FFh - enabling deterministic real-time response in battery-aware and EMI-sensitive designs.

Key Specifications

Pinout & Package

Package: 20-pin LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F2M121ANSP, R5F2M122ANSP provides 4 KB more Flash and 128 bytes more RAM for complex control logic and data history; compared with R5F2M122ADSP, it trades extended temperature rating for lower acquisition cost in commercial-grade environments.

Availability

R5F2M122ANSP is available at Aetrix Electronics and suitable for home appliance control, consumer audio systems, office equipment, and smart remote applications requiring stable component supply and long-term production continuity.

Supply support for R5F2M122ANSP 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, and power solutions for automotive, industrial, and consumer markets.

The R8C/M12A Group, including R5F2M122ANSP, was engineered for cost-effective, low-power embedded control in high-volume consumer electronics where integration of A/D, timers, and data flash reduces system complexity and bill-of-materials cost.

FAQ

What is the maximum operating frequency of the R5F2M122ANSP and under what voltage conditions?

The R5F2M122ANSP supports a maximum operating frequency of 20 MHz when powered at 2.7 V to 5.5 V. At lower supply voltages (1.8 V to 5.5 V), the maximum frequency is reduced to 5 MHz to ensure reliable operation - a key constraint for battery-powered designs where voltage droop must be managed alongside clock performance.

Does the R5F2M122ANSP include on-chip debug capability, and what interfaces does it support?

Yes, the R5F2M122ANSP includes full on-chip debug functionality with support for flash rewrite during debugging. It uses Renesas' standard on-chip debug interface, compatible with E8/E8a emulators and CS+ IDE, enabling real-time register inspection, breakpoint setting, and non-intrusive program execution - no external JTAG adapter required for basic development.

How many A/D converter channels does the R5F2M122ANSP have, and what is their resolution?

The R5F2M122ANSP integrates a 10-bit successive-approximation A/D converter with six input channels (AN0–AN4 and AN7). Each channel supports sample-and-hold and sweep mode operation, delivering consistent 10-bit precision across the full 1.8–5.5 V supply range - sufficient for accurate temperature, voltage, and sensor signal digitization in consumer-grade systems.

What package type and pin count does the R5F2M122ANSP use, and is it RoHS-compliant?

The R5F2M122ANSP is supplied in a 20-pin LSSOP package (PLSP0020JB-A), with 0.65 mm lead pitch and gull-wing leads. This surface-mount package is fully RoHS-compliant and optimized for automated assembly in high-density consumer PCB layouts - offering better thermal performance and smaller footprint than equivalent DIP variants.

What are the key differences between the R5F2M122ANSP and the R5F2M122ANDD variant?

The R5F2M122ANSP uses a 20-pin LSSOP package (PLSP0020JB-A), while R5F2M122ANDD uses a 20-pin DIP package (PRDP0020AD-A). Both share identical electrical specifications, memory, and peripherals; the difference is purely mechanical - LSSOP suits compact, automated SMT production, whereas DIP supports through-hole prototyping and legacy board upgrades.