Renesas R5F21335ANFP#V2

Overview

R5F21335ANFP from Renesas Electronics is a 16-bit R8C CPU core microcontroller with 24 KB program flash, 2 KB data flash (4 × 1 KB blocks), and 2 KB RAM in a 32-pin LQFP package. It operates at up to 20 MHz (VCC = 2.7–5.5 V), integrates 10-bit A/D (12 channels), dual 8-bit D/A converters, LIN hardware module, and supports real-time clock, PWM, and background flash rewrite. It targets cost-sensitive embedded control in consumer appliances and office equipment.

For engineers reviewing the R5F21335ANFP datasheet, R5F21335ANFP pinout, R5F21335ANFP application, or R5F21335ANFP equivalent, key selection criteria include its 24 KB flash capacity, -20°C to +85°C industrial temperature grade, integrated LIN transceiver support via Timer RA + UART0, BGO-enabled data flash for firmware updates, and low-power stop mode (2.0 µA).

Technical Context

The R5F21335ANFP implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and 1 Mbyte address space. Its memory architecture separates 24 KB program ROM (0A000h–0FFFFh), 4 KB data flash (03000h–03FFFh), and 2 KB RAM (00400h–00BFFh), all accessible without external bus logic.

Peripheral integration includes three independent timers (RA/RB/RC), UART0/1/2 with I²C and LIN modes, SSU shared with I²C-bus, 12-channel 10-bit A/D with sample-and-hold and sweep mode, two 8-bit D/A outputs, dual comparators, voltage detection (3 levels), and on-chip debug with flash rewrite capability.

Key Specifications

Pinout & Package

32-pin LQFP package (PLQP0032GB-A), 7 mm × 7 mm body, 0.8 mm pin pitch, exposed pad not present. Pin functions are fully programmable per peripheral multiplexing; primary I/O includes 27 CMOS bidirectional ports with pull-up enable, 1 input-only port (P4_2), and dedicated analog inputs (AN0–AN11), D/A outputs (DA0/DA1), and LIN-capable UART0 pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21334ANFP and R5F21336ANFP, the R5F21335ANFP delivers optimal balance of flash capacity (24 KB), RAM (2 KB), and data flash (2 KB) for mid-tier embedded control - avoiding under-provisioning while minimizing cost premium over smaller variants.

Availability

R5F21335ANFP is available at Aetrix Electronics and suitable for home appliance control, office equipment motor drive, audio system power management, and industrial sensor node applications requiring stable component supply across multi-year production cycles.

Supply support for R5F21335ANFP 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

The R8C/33A Group, including the R5F21335ANFP, was designed for cost-effective, low-power embedded control in consumer and industrial equipment - emphasizing integrated peripherals, flash flexibility, and robust EMI/EMS performance.

FAQ

What is the maximum operating frequency of the R5F21335ANFP?

The R5F21335ANFP supports a maximum operating frequency of 20 MHz when powered at 2.7–5.5 V using the XIN clock source. At lower supply voltages (1.8–5.5 V), the maximum frequency is reduced to 5 MHz to ensure stable operation. This dual-frequency capability allows flexible design across battery-powered and line-powered systems while maintaining deterministic timing for real-time control tasks in the R5F21335ANFP.

Does the R5F21335ANFP support hardware LIN communication?

Yes, the R5F21335ANFP includes a hardware LIN module implemented using Timer RA and UART0, enabling full LIN 2.0/2.1 protocol compliance without software bit-banging. This offloads LIN frame generation and checksum calculation from the CPU, ensuring precise timing and reducing firmware overhead. The R5F21335ANFP's LIN capability is validated in Renesas' official documentation and requires no external transceiver for basic node functionality.

How much data flash memory does the R5F21335ANFP have, and what is its endurance?

The R5F21335ANFP contains 4 KB of data flash memory organized as four 1 KB blocks, supporting background operation (BGO) for concurrent read/erase/write. Its specified endurance is 10,000 erase/write cycles per block - sufficient for logging, calibration storage, or firmware update staging in long-lifecycle embedded products. This data flash is electrically erasable at standard VCC (2.7–5.5 V) and retains data for 20 years at 85°C, as confirmed in the R5F21335ANFP datasheet.

What are the low-power modes supported by the R5F21335ANFP?

The R5F21335ANFP supports standard operating mode (with high-speed, low-speed, or on-chip oscillator clocks), wait mode (CPU halted, peripherals active), and stop mode (all clocks stopped except optional 32 kHz XCIN). In stop mode at 3.0 V, current consumption drops to 2.0 µA - ideal for battery-backed real-time clock or wake-on-interrupt applications. These modes are controlled via system clock registers (CM0/CM1) and verified in the R5F21335ANFP electrical characteristics table.

Is the R5F21335ANFP pin-compatible with other devices in the R8C/33A Group?

Yes, all R8C/33A Group MCUs, including R5F21331ANFP through R5F21336ANFP, share identical 32-pin LQFP (PLQP0032GB-A) packaging and pin assignments. This allows direct PCB reuse across variants - for example, upgrading from R5F21334ANFP to R5F21335ANFP requires only firmware and BOM changes, with no layout modification. Pin compatibility is explicitly confirmed in Renesas' Package Code PLQP0032GB-A specification and Figure 1.3 of the R5F21335ANFP datasheet.