Renesas R5F21207KFP#U1

Overview

R5F21207KFP from Renesas Electronics is a 16-bit R8C/20 Group microcontroller built on silicon gate CMOS technology, featuring an R8C CPU core, 48 KB flash program memory, 2.5 KB RAM, and operation up to 20 MHz at 3.0–5.5 V. It integrates UART0/UART1, I²C bus interface, hardware LIN module (using Timer RA and UART0), 10-bit 12-channel ADC, and multiple 8-/16-bit timers for automotive body control and industrial sensor interface applications.

For engineers reviewing the R5F21207KFP datasheet, R5F21207KFP pinout, R5F21207KFP application, or R5F21207KFP equivalent, this page delivers verified technical context, package mapping to PLQP0048KB-A (48-pin LQFP), validated pin functions, real-world use scenarios, and two confirmed alternative parts with documented functional and application differences.

Technical Context

The R5F21207KFP implements the R8C CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz, 3.0–5.5 V). Its memory architecture includes 1 Mbyte address space, fixed interrupt vector table at 0FFDCh–0FFFFh, and SFRs mapped to 00000h–002FFh.

Peripheral integration centers on dual UART channels (UART0 with LIN support, UART1), I²C bus interface (2-wire), clock-synchronous serial I/O with chip select, 16-bit Timer RD with input capture/output compare on two channels, and 10-bit ADC with 12 analog inputs (AN0–AN11) referenced to internal or external VREF.

Key Specifications

Pinout & Package

Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pitch. RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21207KFP, R5F21207JFP trades temperature range for lower cost in benign environments, while R5F21217KFP adds data flash for persistent storage-neither offers pin-to-pin replacement without firmware or layout review due to differing memory map allocation.

Availability

R5F21207KFP is available at Aetrix Electronics and suitable for automotive body control, industrial sensor nodes, home appliance motor control, and smart meter interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21207KFP 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 R8C/20 Group, including R5F21207KFP, was designed for cost-sensitive, real-time embedded control in automotive body electronics and industrial equipment where reliability at high ambient temperatures is critical.

FAQ

What is the maximum operating frequency of the R5F21207KFP?

The R5F21207KFP operates at a maximum frequency of 20 MHz when supplied with 3.0–5.5 V. At this speed, its minimum instruction execution time is 50 ns. The device also supports 16 MHz and 10 MHz operation under reduced voltage conditions (2.7–5.5 V), enabling flexible power/performance trade-offs in battery-powered or thermally constrained designs. All timing specifications are guaranteed across the full -40°C to +125°C range.

Does the R5F21207KFP include hardware LIN support?

Yes, the R5F21207KFP includes dedicated hardware LIN support via its UART0 peripheral combined with Timer RA, enabling full LIN 2.1/2.2 protocol compliance without CPU overhead. This integrated LIN module handles break field detection, sync byte handling, and checksum calculation in hardware, reducing firmware complexity and improving timing accuracy compared to software-based implementations. The R5F21207KFP does not require external LIN transceivers to be connected directly to UART pins.

What package type and pin count does the R5F21207KFP use?

The R5F21207KFP uses a 48-pin plastic LQFP package designated PLQP0048KB-A, with 0.5 mm pin pitch and a 7 mm × 7 mm body. This package is RoHS-compliant and rated MSL-3. Pin assignments are fully documented in the Renesas hardware manual, including multiplexed functions such as P0_0/AN7 (GPIO or ADC channel 7) and P1_5/RXD0/(TRAIO)/(INT1), where alternate functions are selected via register configuration-not hardware strapping.

How much flash and RAM does the R5F21207KFP provide?

The R5F21207KFP integrates 48 KB of on-chip flash program memory and 2.5 KB of SRAM. Flash is organized in a single block starting at address 04000h and ending at 0FFFFh; RAM occupies addresses 00400h–00DFFh. Both memories are accessed over the 1 Mbyte unified address space. The R5F21207KFP does not include data flash-unlike the R8C/21 Group's R5F21217KFP-which means nonvolatile parameter storage requires external EEPROM or FRAM if needed.

Is the R5F21207KFP qualified for automotive applications?

Yes, the R5F21207KFP is qualified for automotive applications under its K-version rating (-40°C to +125°C), meeting AEC-Q100 stress test requirements for temperature cycling, HTOL, and ESD. It is explicitly listed in Renesas documentation for "Automotive, etc." use cases and features automotive-grade peripherals including LIN, watchdog timer with reset-start select, oscillation stop detection, and voltage detection circuit-all essential for ASIL-B–compatible systems. Its "Standard" quality grade permits use in body electronics, climate control, and lighting modules.