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Renesas R5F2123AKFP#U0
- Part No.:
- R5F2123AKFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F2123AKFP#U0.pdf
- Description:
- IC MCU 16BIT 96KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,753
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Product details
Overview
R5F2123AKFP#U0 from Renesas Electronics is a 16-bit R8C/23 Group microcontroller with CAN 2.0B interface, 96 KB program flash, 1 KB × 2 data flash, 5 KB RAM, and 12-channel 10-bit ADC - designed for automotive and industrial networking applications requiring embedded real-time control and fault-tolerant communication.
For engineers reviewing the R5F2123AKFP#U0 datasheet, R5F2123AKFP#U0 pinout, R5F2123AKFP#U0 application, or R5F2123AKFP#U0 equivalent, this MCU delivers deterministic timing via 89-instruction R8C core, dual on-chip oscillators (high-speed adjustable + low-speed), integrated LIN hardware module, and 48-pin LQFP package with dedicated CAN TX/RX pins and analog input multiplexing across P0_0–P0_7 and P1_0–P1_3.
Technical Context
The R5F2123AKFP#U0 implements the R8C CPU core with 20-bit address space (1 Mbyte), supporting single-chip operation and executing instructions in as little as 50 ns at 20 MHz. Its peripheral set includes Timer RA/RB (8-bit), Timer RD (16-bit × 2 with input capture/output compare), Timer RE (compare match), UART0/UART1, I²C bus interface (2 channels), hardware LIN (using Timer RA + UART0), and a 1-channel CAN 2.0B controller with 16 message slots.
Memory architecture separates 96 KB program ROM (flash) from 2 KB data flash (1 KB × 2 blocks) and 5 KB SRAM. Power management features include on-chip voltage detection, power-on reset, oscillation stop detection, and selectable watchdog timer reset start - all operating across −40°C to +85°C ambient temperature range with VCC = 3.0–5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit, 89 instructions, 50 ns min instruction time at 20 MHz |
| Memory | 96 KB program flash + 2 KB data flash (1 KB × 2) + 5 KB RAM |
| ADC | 10-bit resolution, 12 input channels (AN0–AN11), internal reference support |
| CAN Interface | 1 channel, CAN 2.0B compliant, 16 message buffers, dedicated CTX0/CRX0 pins |
| Package | 48-pin LQFP (PLQP0048KB-A), 0.5 mm pitch, 7 mm × 7 mm body |
| Operating Range | −40°C to +85°C ambient, VCC = 3.0–5.5 V, supports high-speed on-chip oscillator tuning |
| Peripherals | 2 UARTs, 2 I²C interfaces, hardware LIN (Timer RA + UART0), 8-bit × 2 + 16-bit × 2 timers |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 0.5 mm pin pitch, 7 mm × 7 mm body, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | SCL / SSCK | I²C clock or synchronous serial clock I/O; shared function requires software configuration |
| 3 (P3_4) | SDA / SCS | I²C data or chip-select signal I/O; enables multi-device I²C or SPI-like peripheral selection |
| 7 (RESET) | Reset Input | Active-low asynchronous reset; initiates hardware reset sequence upon logic low assertion |
| 10 (XIN) | Crystal Input | Accepts external crystal/resonator (1–20 MHz) or CMOS clock source for main system timing |
| 11 (VCC/AVCC) | Power Supply | Digital + analog supply pin; AVCC requires local decoupling to ensure ADC accuracy |
| 42 (P6_2) | CRX0 | CAN receive input; differential receiver input for CAN bus physical layer (ISO 11898-2 compatible) |
| 43 (P6_1) | CTX0 | CAN transmit output; drives dominant/recessive states onto CAN bus via external transceiver |
| 40 (P4_2) | VREF | External reference voltage input for ADC; sets full-scale range independent of AVCC |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash Endurance | 10,000 write/erase cycles - enables reliable firmware parameter storage without external EEPROM |
| Hardware LIN Module | Integrated LIN 2.0/2.1 support via Timer RA + UART0 - eliminates software bit-banging overhead |
| Adjustable High-Speed Oscillator | On-chip RC oscillator with frequency tuning - reduces BOM cost by removing external crystal in non-CAN-critical subsystems |
| Dedicated CAN Pins | Isolated CTX0/CRX0 pins with no shared alternate functions - ensures signal integrity and layout simplicity for CAN routing |
| Analog Input Flexibility | 12-channel ADC with inputs distributed across P0, P1, and P4 - supports mixed-signal sensor aggregation in compact layouts |
Applications
| Automotive Body Control Module | Industrial CAN Gateway |
|---|---|
|
Use Scenario: Centralized control of door locks, lighting, wipers, and HVAC in passenger vehicles using LIN subnets and CAN backbone communication. IC Role / Device Role / Timing Role: Primary MCU managing protocol translation between LIN slaves and CAN network; executes real-time scheduling with 50 ns instruction granularity. Use Value: Hardware LIN + CAN integration reduces external component count and ensures deterministic response under bus load up to 500 kbps. |
Use Scenario: Protocol bridge connecting Modbus RTU field devices to higher-layer CANopen networks in factory automation systems. IC Role / Device Role / Timing Role: Dual-interface gateway processor handling UART-based serial protocols and CAN message framing with 16-slot buffer management. Use Value: On-chip 96 KB flash stores dual protocol stacks; data flash retains node configuration across power cycles without external NV memory. |
| Smart Sensor Node | Medical Diagnostic Equipment Controller |
|
Use Scenario: Compact environmental monitoring unit measuring temperature, humidity, and pressure with local processing and CAN telemetry upload. IC Role / Device Role / Timing Role: Signal acquisition MCU performing 10-bit ADC sampling, digital filtering, and CAN message formatting at 100 Hz update rate. Use Value: 12-channel ADC with VREF pin allows ratiometric sensor measurements; 5 KB RAM accommodates real-time filter buffers and CAN TX queues. |
Use Scenario: Front-end controller for portable ultrasound or ECG devices requiring precise timing, analog front-end interfacing, and safety-critical watchdog supervision. IC Role / Device Role / Timing Role: Safety-monitored control unit managing analog signal chain, user interface, and diagnostic reporting via CAN bus. Use Value: Integrated voltage detection, oscillation stop detection, and 15-bit watchdog provide layered fault detection per IEC 62304 Class B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2123AJFP | Same R8C/23 Group, identical peripherals and pinout, but rated for −40°C to +85°C (J version) vs. R5F2123AKFP#U0's K version (−40°C to +125°C) | Not qualified for under-hood automotive use where extended temperature operation is required | Select R5F2123AJFP only if ambient temperature remains ≤85°C and cost optimization is prioritized over thermal margin |
| R5F2122AKFP | Same package and pinout, but belongs to R8C/22 Group - lacks 2 KB data flash (1 KB × 2); otherwise identical CPU, RAM, ADC, CAN, and peripherals | Cannot store calibrated sensor parameters or field-upgradable configuration data in on-chip nonvolatile memory | Choose R5F2122AKFP only when data logging or runtime parameter persistence is unnecessary and program flash suffices for all storage needs |
Compared with R5F2123AJFP and R5F2122AKFP, the R5F2123AKFP#U0 uniquely combines extended-temperature operation (−40°C to +125°C) with dedicated data flash for robust parameter retention - making it the sole option among these three for thermally demanding automotive powertrain or industrial motor control nodes requiring both reliability and configurability.
Availability
R5F2123AKFP#U0 is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN gateways, smart sensor nodes, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F2123AKFP#U0 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 R5F2123AKFP#U0 belongs to the R8C/23 Group - a family of 16-bit MCUs engineered for cost-sensitive, real-time embedded systems requiring CAN/LIN connectivity, analog integration, and extended-temperature operation in automotive and industrial environments.
FAQ
What is the maximum operating frequency and corresponding supply voltage for R5F2123AKFP#U0?
The R5F2123AKFP#U0 operates at up to 20 MHz with VCC = 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. At 10 MHz, it supports down to VCC = 2.7 V. The high-speed on-chip oscillator is tunable, allowing fine frequency adjustment without external components - a key feature confirmed in the R8C/23 Group hardware manual for R5F2123AKFP#U0.
Does R5F2123AKFP#U0 include hardware support for LIN communication?
Yes, R5F2123AKFP#U0 integrates a dedicated hardware LIN module compliant with LIN 2.0/2.1 standards, implemented using Timer RA and UART0. This eliminates software bit-banging, ensures accurate baud rate generation, and supports automatic header detection and checksum verification - all documented in the R8C/23 Group functional specification for R5F2123AKFP#U0.
How many CAN message buffers does R5F2123AKFP#U0 support, and are they configurable?
R5F2123AKFP#U0 provides 16 dedicated CAN message slots within its CAN module, each configurable for transmission or reception. Buffer allocation, identifier masking, and priority assignment are controlled via special function registers (SFRs) in the 01300h–0147Fh address range - fully detailed in the R8C/23 Group register description for R5F2123AKFP#U0.
What is the endurance rating of the data flash in R5F2123AKFP#U0?
The data flash in R5F2123AKFP#U0 is rated for 10,000 write/erase cycles per block (1 KB × 2 blocks), significantly exceeding the 1,000-cycle endurance of its program flash. This enables reliable storage of calibration data, device configuration, or field-upgrade parameters - a distinguishing specification confirmed in Table 1.2 of the R8C/23 Group datasheet for R5F2123AKFP#U0.
Is R5F2123AKFP#U0 pin-compatible with other R8C/23 Group members?
Yes, R5F2123AKFP#U0 shares the identical 48-pin LQFP (PLQP0048KB-A) package and pin assignment with all R8C/23 Group variants including R5F21236JFP through R5F2123CKFP. Pin functions, electrical characteristics, and peripheral mappings are consistent across the group - verified in Figure 1.4 and Table 1.6 of the R8C/23 Group hardware manual for R5F2123AKFP#U0.
R5F2123AKFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/2x/23
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- CANbus, I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, Voltage Detect, WDT
- Number of I/O:
- 41
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F2123AKFP#U0 FAQ
1.How can I place an order for R5F2123AKFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2123AKFP#U0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R5F2123AKFP#U0 reliable?
The price and inventory of R5F2123AKFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2123AKFP#U0 is usually 5 days.
3.What payment methods are accepted for R5F2123AKFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2123AKFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2123AKFP#U0?
R5F2123AKFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2123AKFP#U0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R5F2123AKFP#U0?
For technical support, including R5F2123AKFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2123AKFP#U0 requirements.
6.How does Aetrix verify that R5F2123AKFP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F2123AKFP#U0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R5F2123AKFP#U0 meets industry standards.
7.What is the process for return or replacement of R5F2123AKFP#U0?
All R5F2123AKFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2123AKFP#U0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R5F2123AKFP#U0 part is unused and in its original packaging.
Return procedure for R5F2123AKFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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