Renesas R5F10277ANA#65

Overview

R5F10277ANA#65 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller with 4 KB code flash, 2 KB data flash, and 512 B RAM, operating at 1.8–5.5 V and delivering 31 DMIPS at 24 MHz. It integrates an ultra-low-power CPU core (63 μA/MHz), 10-bit 11-channel ADC, dual CSI/I²C serial interfaces, UART, 4-channel 16-bit TAU timer, and DMA controller - deployed in battery-powered sensor nodes and industrial control panels.

For engineers reviewing the R5F10277ANA#65 datasheet, R5F10277ANA#65 pinout, R5F10277ANA#65 application, or R5F10277ANA#65 equivalent, key selection criteria include its 2 KB on-chip data flash with 1M rewrite cycles, ±1.0% high-speed on-chip oscillator accuracy over –20 to +85°C, hardware CRC engine, and support for STOP/HALT/SNOOZE low-power modes in consumer-grade (–40 to +85°C) operation.

Technical Context

The R5F10277ANA#65 implements the RL78 CISC CPU core with 3-stage pipeline and 1 MB address space, executing instructions in as little as 0.04167 µs at 24 MHz using the high-speed on-chip oscillator. Its peripheral set includes two CSI channels (SPI-compatible), two simplified I²C channels, one UART channel, and four 16-bit timer channels with PWM capability - all accessible via configurable port pins including P00–P03, P10–P14, P20–P23, P40–P42, and P60–P61.

Power management is handled by integrated POR, LVD (12 selectable voltage thresholds), and three low-power modes: HALT (CPU stopped, peripherals active), STOP (all clocks halted except LSI), and SNOOZE (peripheral-triggered wake-up while CPU sleeps). The device supports background data flash rewriting (BGO) and self-programming with flash shield window protection, enabling secure firmware updates without external programming hardware.

Key Specifications

Pinout & Package

Package: HWQFN-24 (4 mm × 4 mm, 0.5 mm pitch) with exposed die pad connected to VSS per design recommendation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10278ANA#65 and R5F10377ANA#65, the R5F10277ANA#65 delivers optimal balance of embedded data storage, communication flexibility, and timing precision for mid-complexity IoT edge nodes - offering 2 KB data flash and ±1.0% oscillator accuracy not found in the R5F103 series, while avoiding the memory overhead of the 8 KB R5F10278 variant.

Availability

R5F10277ANA#65 is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial motor control panels, and portable medical devices requiring stable component supply across long-lifecycle production programs.

Supply support for R5F10277ANA#65 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 RL78/G12 product line targets cost-sensitive, ultra-low-power general-purpose embedded applications - designed to replace legacy 8-bit MCUs with enhanced integration, security features, and energy efficiency without increasing bill-of-materials cost.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F10277ANA#65?

The R5F10277ANA#65 operates at up to 24 MHz using its high-speed on-chip oscillator, achieving 31 DMIPS performance. This is measured under HS (high-speed main) mode with VDD = 2.7–5.5 V. Instruction execution time ranges from 0.04167 µs (24 MHz) to 1 µs (1 MHz), supporting both high-throughput and ultra-low-power operation depending on system requirements. The R5F10277ANA#65 maintains full peripheral functionality across this frequency range.

Does the R5F10277ANA#65 support hardware-accelerated cryptographic functions?

The R5F10277ANA#65 does not include AES, SHA, or RSA acceleration engines. However, it integrates a dedicated hardware CRC calculation unit compliant with CRC-16/CCITT standards - used for data integrity verification in firmware updates, communication protocols, and EEPROM logging. This offloads CRC computation from the CPU, reducing latency and power consumption compared to software-only implementations. No other cryptographic primitives are supported in the R5F10277ANA#65.

What are the key differences between R5F10277ANA#65 and R5F10377ANA#65?

The R5F10277ANA#65 includes 2 KB data flash, DMA controller, hardware CRC, RAM/SFR guard, and ±1.0% oscillator accuracy - features absent in the R5F10377ANA#65. The R5F10377ANA#65 omits data flash and safety peripherals, reduces serial interface count (1 CSI, 0 simplified I²C), and degrades oscillator accuracy to ±5.0%. Both share identical package, pinout, and core architecture, but the R5F10277ANA#65 is required for applications needing secure local data storage or deterministic communication timing.

Can the R5F10277ANA#65 operate reliably at 1.8 V supply voltage?

Yes, the R5F10277ANA#65 is fully specified for operation at 1.8 V across its entire temperature range (–40 to +85°C). At this voltage, the high-speed on-chip oscillator supports frequencies up to 8 MHz (LS mode), and all peripherals - including the 10-bit ADC, UART, and timers - remain functional. The device maintains 63 μA/MHz active current efficiency even at minimum VDD, making it suitable for single-cell lithium or coin-cell powered designs where regulated 3.3 V is unavailable.

How many analog input channels does the R5F10277ANA#65 support, and what reference options are available?

The R5F10277ANA#65 supports 11 analog input channels (ANI0–ANI3, ANI16–ANI22) with 10-bit resolution. It provides internal reference voltages: AVREFP (analog reference plus) and AVREFM (analog reference minus), plus a fixed 1.45 V internal reference usable for ratiometric or absolute measurements. External reference inputs are not supported - all ADC conversions use either the internal 1.45 V reference or the AVREFP/AVREFM differential pair. No external VREF pin is present on the R5F10277ANA#65.