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Renesas R5F21322CDSP#W4
- Part No.:
- R5F21322CDSP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21322CDSP#W4.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,049
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Product details
Overview
R5F21322CDSP#W4 from Renesas Electronics is an 8 KB flash, 1 KB RAM, 20-pin LSSOP microcontroller based on the R8C CPU core, operating at up to 20 MHz (VCC = 2.7–5.5 V), featuring integrated 10-bit A/D converter (4 channels), LIN hardware module, and background operation (BGO) data flash for in-system reprogramming - deployed in consumer audio equipment and office automation control systems.
For engineers reviewing the R5F21322CDSP#W4 datasheet, R5F21322CDSP#W4 pinout, R5F21322CDSP#W4 application, or R5F21322CDSP#W4 equivalent, key selection criteria include its -40°C to +85°C industrial temperature grade, 20-pin PLSP0020JB-A package, dual UART/I²C/SSU serial interfaces, real-time clock (Timer RE), and hardware LIN compliance for automotive body electronics interoperability.
Technical Context
The R5F21322CDSP#W4 implements the R8C 16-bit CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. It supports single-chip mode with 1 Mbyte address space and executes instructions in as little as 50 ns at 20 MHz.
Its peripheral set includes Timer RA/RB (8-bit), Timer RC (16-bit with 4 capture/compare registers), Timer RE (real-time clock), DTC (1-channel), watchdog timer (14-bit), voltage detection circuit (3-level), and comparator B (2 circuits), all managed via dedicated SFRs mapped to fixed memory addresses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 16×16→32-bit multiplier, and MAC support - enables efficient signal processing in resource-constrained embedded control. |
| Memory | 8 KB program flash + 1 KB × 4 data flash (10,000 erase/write cycles) + 1 KB RAM - supports firmware updates and parameter storage without external EEPROM. |
| Operating Voltage | 1.8–5.5 V supply range - allows direct interface with 3.3 V or 5 V logic and battery-powered operation down to 1.8 V. |
| Current Consumption | Typ. 6.5 mA @ 5.0 V/20 MHz; 3.5 µA in wait mode (32 kHz XCIN) - enables low-power sensor node and standby-mode applications. |
| Temperature Range | -40°C to +85°C (D version) - qualified for industrial and automotive body electronics environments without derating. |
| Serial Interfaces | UART0, UART2 (with I²C mode & multiprocessor comms), SSU, and hardware LIN (using Timer RA + UART0) - reduces external transceiver count in LIN bus nodes. |
| A/D Converter | 10-bit resolution × 4 channels with sample-and-hold and sweep mode - suitable for analog sensor monitoring (e.g., thermistors, potentiometers) without external ADC. |
Pinout & Package
Package: 20-pin LSSOP (PLSP0020JB-A, 0.65 mm pitch), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 / AN8 / KI0 | Analog input / key interrupt / timer input | Configurable as 10-bit A/D channel 8, key wake-up source, or TRCIOD trigger - enables shared pin usage for cost-sensitive front-panel designs. |
| P1_4 / TXD0 / TRCCLK | UART0 transmit / timer clock input | Drives serial debug output while simultaneously serving as external clock source for Timer RC - simplifies timing-critical communication protocols. |
| P3_7 / SDA2 / TRAO / RXD2 / SCL2 | I²C data / timer output / UART2 receive | Multi-function pin supporting I²C slave/master, LIN response, and UART2 data - eliminates need for external level shifters in mixed-voltage systems. |
| P4_6 / XIN / XCIN | Primary/secondary crystal oscillator input | Accepts either 20 MHz ceramic resonator (XIN/XOUT) or 32.768 kHz crystal (XCIN/XCOUT) - provides precise timing for RTC and high-speed operation from one footprint. |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up - ensures reliable power-on initialization without external RC network. |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) Data Flash | Enables concurrent code execution and flash reprogramming - critical for field-upgradable firmware in consumer appliances. |
| Hardware LIN Module | Integrated LIN 2.1-compliant controller using Timer RA and UART0 - eliminates external LIN transceiver in door module and seat control units. |
| Real-Time Clock (Timer RE) | 8-bit counter with seconds/minutes/hours/day-of-week registers and compare match - delivers accurate timekeeping without external RTC IC. |
| Voltage Detection Circuit | Three configurable detection levels with power-on reset and selectable thresholds - ensures safe brown-out recovery in variable-supply environments. |
| Dual Clock Oscillators | High-speed on-chip oscillator (adjustable) + low-speed 32 kHz XCIN oscillator - allows seamless transition between active and ultra-low-power modes. |
Applications
| Audio Equipment Control | Office Automation Device |
|---|---|
|
Use Scenario: Volume, tone, and input source control in compact stereo receivers and Bluetooth speakers. IC Role / Device Role / Timing Role: Main system controller executing user interface logic, managing DAC/ADC interfaces, and driving LED displays. Use Value: Integrated 10-bit A/D and PWM-capable Timer RB enable direct knob/sensor reading and LED dimming - reducing BOM count by two external ICs. |
Use Scenario: Paper jam detection, motor control, and status reporting in desktop printers and multifunction peripherals. IC Role / Device Role / Timing Role: Real-time peripheral coordinator interfacing with stepper drivers, optical sensors, and USB-to-serial bridge. Use Value: Hardware LIN and UART2 with I²C mode allow unified communication with print head, feeder, and mainboard - eliminating protocol translation ICs. |
| Home Appliance Interface | Industrial Sensor Node |
|
Use Scenario: Keypad scanning, display update, and thermal protection in microwave ovens and induction cooktops. IC Role / Device Role / Timing Role: Safety-critical subsystem controller with voltage monitoring, watchdog timer, and fast interrupt response (7 priority levels). Use Value: Built-in voltage detection (3 levels) and 14-bit watchdog timer ensure fail-safe shutdown during power anomalies - meeting IEC 60730 Class B requirements. |
Use Scenario: Battery-powered environmental monitoring (temperature/humidity) with periodic wireless upload in smart building systems. IC Role / Device Role / Timing Role: Ultra-low-power data acquisition engine using stop mode (2.0 µA) and wake-on-interrupt from analog comparators. Use Value: 3.5 µA wait mode current with 32 kHz RTC clock enables >1-year battery life on CR2032 - avoiding costly energy harvesting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21322CNSP | Same core, memory, and peripherals but rated for -20°C to +85°C (N version); no industrial temperature qualification. | Suitable for commercial-grade consumer devices only; not certified for extended ambient operation. | Select R5F21322CNSP only when full industrial temperature range is unnecessary and cost sensitivity is high. |
| R5F21324CDSP | 16 KB program ROM + 1.5 KB RAM; otherwise identical peripheral set and pinout. | Required for larger firmware images (e.g., USB HID stack, advanced UI rendering) where 8 KB is insufficient. | Choose R5F21324CDSP when future firmware expansion or feature-rich GUI demands >8 KB code space. |
Compared with R5F21322CDSP#W4, R5F21322CNSP lacks extended temperature validation and R5F21324CDSP adds 8 KB ROM/512 B RAM - making the former unsuitable for harsh environments and the latter optimal for scalable firmware development.
Availability
R5F21322CDSP#W4 is available at Aetrix Electronics and suitable for electronic household appliances, office equipment, and audio equipment requiring stable component supply across long production lifecycles.
Supply support for R5F21322CDSP#W4 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 IoT markets.
The R8C/32C Group, including R5F21322CDSP#W4, was designed for cost-sensitive, low-power embedded control in consumer and industrial equipment - emphasizing integration, EMI/EMS robustness, and ease of firmware maintenance.
FAQ
What is the maximum operating frequency of the R5F21322CDSP#W4?
The R5F21322CDSP#W4 operates at up to 20 MHz when supplied with 2.7–5.5 V and using an external 20 MHz crystal on XIN/XOUT. At lower voltages (1.8–5.5 V), it supports 5 MHz operation - enabling flexible clock scaling for power/performance trade-offs in battery-powered designs.
Does the R5F21322CDSP#W4 support in-system programming of its flash memory?
Yes, the R5F21322CDSP#W4 supports background operation (BGO) for data flash, allowing program execution while erasing or writing to 1 KB × 4 data flash blocks. This enables field firmware updates without halting real-time control functions - a key requirement for appliance and industrial controllers.
What serial communication interfaces are integrated into the R5F21322CDSP#W4?
The R5F21322CDSP#W4 integrates UART0, UART2 (with I²C-bus mode and multiprocessor communication), synchronous serial unit (SSU), and a hardware LIN module (using Timer RA and UART0). These interfaces support simultaneous use - for example, UART0 for debug, UART2 for LIN bus, and SSU for sensor SPI communication.
Is the R5F21322CDSP#W4 pin-compatible with other members of the R8C/32C Group?
Yes, all R8C/32C Group MCUs in the 20-pin LSSOP package (PLSP0020JB-A), including R5F21322CDSP#W4, R5F21322CNSP, and R5F21324CDSP, share identical pinouts and electrical characteristics. This enables drop-in replacement across memory variants without PCB redesign.
What is the purpose of the "D" suffix in R5F21322CDSP#W4?
The "D" in R5F21322CDSP#W4 denotes the industrial temperature grade (-40°C to +85°C), distinguishing it from the "N" version (-20°C to +85°C). This qualification ensures reliable operation in demanding environments such as automotive cabin modules and factory-floor equipment.
R5F21322CDSP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/3x/32C
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 15
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21322CDSP#W4 FAQ
1.How can I place an order for R5F21322CDSP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21322CDSP#W4 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 R5F21322CDSP#W4 reliable?
The price and inventory of R5F21322CDSP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21322CDSP#W4 is usually 5 days.
3.What payment methods are accepted for R5F21322CDSP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21322CDSP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21322CDSP#W4?
R5F21322CDSP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21322CDSP#W4 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 R5F21322CDSP#W4?
For technical support, including R5F21322CDSP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21322CDSP#W4 requirements.
6.How does Aetrix verify that R5F21322CDSP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F21322CDSP#W4 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 R5F21322CDSP#W4 meets industry standards.
7.What is the process for return or replacement of R5F21322CDSP#W4?
All R5F21322CDSP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21322CDSP#W4, 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 R5F21322CDSP#W4 part is unused and in its original packaging.
Return procedure for R5F21322CDSP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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