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Renesas R5F21322DDSP#U0
- Part No.:
- R5F21322DDSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21322DDSP#U0.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,165
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Product details
Overview
R5F21322DDSP#U0 from Renesas Electronics is an 8 KB Flash, 1 KB RAM 16-bit R8C CPU core microcontroller in a 20-pin LSSOP package, operating from 1.8 V to 5.5 V with -40°C to +85°C industrial temperature range. It integrates UART0/UART2 (with I²C mode), 10-bit × 4-channel ADC, four 8-/16-bit timers (RA/RB/RC/RE), watchdog timer, voltage detection, and on-chip oscillators - deployed in motor control subsystems of home appliances and office equipment.
For engineers reviewing the R5F21322DDSP#U0 datasheet, R5F21322DDSP#U0 pinout, R5F21322DDSP#U0 application, or R5F21322DDSP#U0 equivalent, key selection criteria include its D-version extended temperature rating, 20-pin PLSP0020JB-A footprint, R8C instruction set efficiency (50 ns min. instruction time at 20 MHz), integrated real-time clock (Timer RE), and dual UART with I²C capability for sensor and actuator interfacing.
Technical Context
The R5F21322DDSP#U0 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit hardware multiplier, and 20-bit address space supporting up to 1 Mbyte. Its memory map allocates fixed interrupt vectors at 0FFDCh–0FFFFh and internal RAM at 00400h–007FFh.
Peripheral integration includes Timer RC with 4 capture/compare registers and PWM2 output, UART2 supporting full-duplex I²C-bus communication (SCL2/SDA2), and dual voltage detection circuits enabling programmable reset and brown-out protection. The device supports wait/stop low-power modes with typical current as low as 2.0 µA in stop mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 16×16→32-bit multiplier, 20-bit PC |
| Flash / RAM | 8 KB program Flash (1,000 write/erase cycles), 1 KB SRAM (used for stack and data) |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 3.3 V and 5 V logic systems |
| Temperature Range | -40°C to +85°C (D version) - qualified for industrial ambient environments |
| Max Clock Frequency | 20 MHz at VCC ≥ 2.7 V - delivers 50 ns minimum instruction execution time |
| ADC | 10-bit resolution × 4 channels with sample-and-hold and sweep mode - supports multi-sensor analog monitoring |
| Timers | Timer RA (8-bit), RB (8-bit PWM), RC (16-bit with 4 capture/compare), RE (8-bit RTC) - enables motor timing, pulse generation, and calendar functions |
Pinout & Package
Package: 20-pin LSSOP (PLSP0020JB-A, 0.65 mm pitch), surface-mount, JEDEC-standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0/AN8/KI0 | Analog input / key interrupt / timer input | Shared A/D channel 8, key wake-up source, and TRCIOD trigger input |
| P1_4/TXD0/TRCCLK | UART0 transmit / timer clock input | Drives serial data out while simultaneously serving as external clock source for Timer RC |
| P3_4/RXD2/SCL2/IVREF3 | I²C clock / UART2 receive / comparator reference | Enables shared pin usage for I²C bus control, serial comms, and precision analog reference |
| P4_6/XIN(/XCIN) | Main crystal oscillator input | Accepts 20 MHz ceramic resonator or crystal; also configurable as 32 kHz XCIN input for RTC |
| RESET | Active-low reset input | Hardware reset assertion resets CPU, peripherals, and SFRs to power-on state |
Key Features
| Feature | Design Value |
|---|---|
| R8C CPU efficiency | 89-instruction set with 50 ns min. execution at 20 MHz - reduces code size and improves real-time response |
| Dual UART with I²C mode | UART2 supports full-duplex I²C-bus (SCL2/SDA2) - eliminates need for external I²C controller in sensor networks |
| Real-time clock (Timer RE) | 8-bit counter tracking seconds, minutes, hours, and weekday - enables time-stamped logging without external RTC |
| Low-power operation | 2.0 µA in stop mode (VCC = 3.0 V) - extends battery life in always-on standby applications |
| Voltage detection system | Three-level detection (VDD monitor + two selectable VDET levels) - provides flexible brown-out and reset threshold configuration |
Applications
| Home Appliance Motor Control | Office Equipment Power Management |
|---|---|
Use Scenario: Speed-regulated DC fan control in air purifiers and HVAC units. IC Role / Device Role / Timing Role: R5F21322DDSP#U0 executes closed-loop PID via Timer RB PWM output and reads back current/voltage via AN8–AN11 ADC inputs. Use Value: Integrated 10-bit ADC and PWM generator eliminate external signal conditioning and driver ICs, reducing BOM count by two components. |
Use Scenario: Standby power sequencing and status monitoring in multifunction printers. IC Role / Device Role / Timing Role: R5F21322DDSP#U0 manages power rail enable/disable using GPIO, monitors supply voltages via VDET, and logs events via UART0 to host MCU. Use Value: On-chip voltage detection and 20-pin compact footprint allow full power supervision within tight board space constraints. |
| Consumer Audio System UI | Industrial Sensor Hub Interface |
Use Scenario: Keypad scanning and display backlight dimming in portable audio players. IC Role / Device Role / Timing Role: R5F21322DDSP#U0 scans KI0–KI3 key inputs and drives LED backlight using Timer RA pulse output. Use Value: Dedicated key interrupt inputs (KI0–KI3) and high-current drive ports simplify mechanical button interface without external debouncing circuitry. |
Use Scenario: Aggregating temperature/humidity/I²C sensor data for gateway transmission. IC Role / Device Role / Timing Role: R5F21322DDSP#U0 acts as I²C master (via UART2 pins SCL2/SDA2), reads sensors, buffers data in RAM, and forwards via UART0 to host processor. Use Value: Dual UART + I²C mode enables concurrent local sensor bus control and upstream serial telemetry - no second MCU required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21322DNSP | N-version (-20°C to +85°C), identical Flash/RAM/peripherals, same PLSP0020JB-A package | Limited to commercial/office environments without extended thermal stress | Select only if operating ambient stays above -20°C; not suitable for outdoor or uncontrolled industrial enclosures. |
| R5F21324DDSP | D-version with 16 KB Flash (vs. 8 KB), same RAM, peripherals, package, and temperature rating | Supports larger firmware images - required for field-upgradable features or expanded protocol stacks | Choose when future firmware growth or bootloader + application partitioning is needed; pin-compatible upgrade path. |
Compared with R5F21322DNSP, the R5F21322DDSP#U0 enables reliable operation in colder industrial settings; compared with R5F21324DDSP, it offers cost-optimized 8 KB Flash for stable, non-upgradable control firmware - balancing memory headroom and unit cost.
Availability
R5F21322DDSP#U0 is available at Aetrix Electronics and suitable for home appliance motor control, office equipment power management, consumer audio UI, and industrial sensor hub interface requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21322DDSP#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 industrial, automotive, and IoT applications.
The R8C/32D Group, including R5F21322DDSP#U0, was designed for cost-sensitive, low-power embedded control in consumer and industrial equipment - emphasizing peripheral integration, EMI/EMS robustness, and efficient R8C core execution.
FAQ
What is the maximum operating frequency of the R5F21322DDSP#U0 and under what conditions?
The R5F21322DDSP#U0 achieves a maximum operating frequency of 20 MHz when supplied with VCC ≥ 2.7 V. At lower voltages (1.8 V to 5.5 V), the maximum frequency drops to 5 MHz. This dual-frequency capability allows design flexibility across power-constrained and performance-critical use cases while maintaining compatibility with common crystal or ceramic resonator sources.
Does the R5F21322DDSP#U0 support I²C communication, and how is it implemented?
Yes, the R5F21322DDSP#U0 supports I²C communication through UART2 configured in I²C mode, using dedicated pins P3_4 (SCL2) and P3_7 (SDA2). This implementation complies with standard I²C-bus protocol, enabling direct connection to temperature sensors, EEPROMs, and other I²C peripherals without external level shifters or protocol translators.
What are the low-power modes available on the R5F21322DDSP#U0, and what is the typical current draw in each?
The R5F21322DDSP#U0 supports wait mode (typ. 3.5 µA at 3.0 V with 32 kHz XCIN) and stop mode (typ. 2.0 µA at 3.0 V). Both modes retain RAM content and allow wake-up via external interrupt or key input. These modes are optimized for battery-backed or energy-harvested systems where microamp-level quiescent current is essential for multi-year operation.
How is the real-time clock (RTC) function realized in the R5F21322DDSP#U0?
The R5F21322DDSP#U0 implements RTC functionality via Timer RE - an 8-bit timer that counts seconds, minutes, hours, and days of week. It operates independently using the 32 kHz XCIN clock source, allowing accurate timekeeping during low-power stop mode. No external RTC chip is required, reducing system cost and PCB area.
What debug and programming interfaces does the R5F21322DDSP#U0 support?
The R5F21322DDSP#U0 supports on-chip debug via single-wire interface and on-board flash rewrite capability. Debug access uses the dedicated MODE and RESET pins in conjunction with Renesas E8/E8a debuggers. Flash programming is performed in-system without removing the device, enabling field firmware updates and production-line programming.
R5F21322DDSP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/3x/32D
- Packaging:
- Tray
- 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:
- -
- 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:
R5F21322DDSP#U0 FAQ
1.How can I place an order for R5F21322DDSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21322DDSP#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 R5F21322DDSP#U0 reliable?
The price and inventory of R5F21322DDSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21322DDSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21322DDSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21322DDSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21322DDSP#U0?
R5F21322DDSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21322DDSP#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 R5F21322DDSP#U0?
For technical support, including R5F21322DDSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21322DDSP#U0 requirements.
6.How does Aetrix verify that R5F21322DDSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21322DDSP#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 R5F21322DDSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21322DDSP#U0?
All R5F21322DDSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21322DDSP#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 R5F21322DDSP#U0 part is unused and in its original packaging.
Return procedure for R5F21322DDSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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