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Renesas R5F21164SP#U0
- Part No.:
- R5F21164SP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21164SP#U0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,208
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Product details
Overview
R5F21164SP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in 20-pin LSSOP package, featuring 16 KB flash ROM, 1 KB RAM, and integrated 10-bit 4-channel ADC. It executes instructions at 50 ns minimum cycle time (20 MHz XIN), supports UART/I²C/serial I/O, and targets embedded control in appliances and industrial equipment.
For engineers reviewing the R5F21164SP#U0 datasheet, R5F21164SP#U0 pinout, R5F21164SP#U0 application, or R5F21164SP#U0 equivalent, this page delivers verified technical context, validated pin functions, confirmed operating voltage range (2.7–5.5 V), real-world use scenarios, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The R5F21164SP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and a 1 Mbyte linear address space. Its memory map allocates 16 KB program ROM from 0xC000–0xFFFF and 1 KB RAM from 0x0400–0x07FF, with fixed interrupt vectors at 0xFFDC–0xFFFF.
It integrates dual clock generation circuits - main crystal/ceramic oscillator (XIN/XOUT) and adjustable high-speed/low-speed on-chip oscillators - plus oscillation stop detection, voltage monitor, and power-on reset. Peripheral control uses dedicated SFRs mapped to addresses 0x0000–0x02FF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89-instruction set, 20 MHz max operation |
| Memory | 16 KB flash ROM (program), 1 KB RAM - sufficient for standalone sensor/control firmware without external memory |
| ADC | 10-bit resolution, 4 input channels (AN8–AN11) - supports analog sensing of temperature, voltage, or potentiometer signals |
| Timers | Timer X (8-bit), Timer Z (8-bit), Timer C (16-bit with input capture/output compare) - enables PWM generation, pulse measurement, and precise timing intervals |
| Serial Interfaces | 1 UART channel + 1 I²C bus interface + 1 clock-synchronous serial I/O - provides flexible communication with sensors, displays, and host controllers |
| Supply Voltage | 2.7–5.5 V - compatible with both 3.3 V and 5 V system rails without level-shifting |
| Operating Temperature | −20°C to +85°C - suitable for indoor consumer and office equipment environments |
Pinout & Package
Package: 20-pin plastic molded LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount, JEDEC MS-013AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | I²C Clock (SCL) | Open-drain bidirectional clock line for I²C slave/master operation |
| 2 (P3_7) | Timer X Input (CNTR0) | External event counter input for frequency measurement or pulse counting |
| 3 (RESET) | Active-low Reset Input | Hardware reset trigger; requires external pull-up and debouncing for reliable startup |
| 4 (XOUT) | Main Clock Output | Drives crystal/resonator feedback path; must be left open when using external clock |
| 5 (VSS/AVSS) | Digital & Analog Ground | Common reference for logic and ADC; separate AVSS improves analog noise immunity |
| 6 (XIN) | Main Clock Input | Accepts crystal, ceramic resonator, or external clock signal up to 20 MHz |
| 7 (VCC) | Power Supply | Primary 2.7–5.5 V supply for core and I/O; decoupling capacitor required near pin |
| 8 (MODE) | Boot Mode Select | Must be tied to VCC via resistor to enable normal flash execution mode |
| 9 (P4_5) | External Interrupt 0 (INT0) | Edge-triggered wake-up or event-handling input with programmable filter |
| 10 (P1_7) | Interrupt 10 / CNTR00 | Timer X channel 0 input or external interrupt source |
| 11 (P1_6) | UART Clock (CLK0) | Transfer clock I/O for synchronous serial mode; unused in UART mode |
| 12 (P1_5) | UART RX / INT11 | Asynchronous receive input or external interrupt source |
| 13 (P1_4) | UART TX | Asynchronous transmit output; open-drain capable for wired-OR bus configurations |
| 14 (P1_3) | LED Drive / TZOUT / AN11 | Configurable as LED sink driver (up to 20 mA), Timer Z output, or ADC input |
| 15 (P1_2) | LED Drive / CMP0_2 / AN10 | Multi-function pin supporting LED drive, comparator output, or analog input |
| 16 (AVCC/VREF) | Analog Power / Reference | Separate analog supply and A/D reference; connect to VCC with 0.1 µF bypass capacitor |
| 17 (P1_1) | LED Drive / CMP0_1 / AN9 | Shared LED drive, comparator, and ADC function - enables compact sensor interface |
| 18 (P1_0) | LED Drive / CMP0_0 / AN8 | Primary analog input and LED driver; supports simultaneous analog sensing and status indication |
| 19 (P3_3) | INT3 / TCIN / CMP1_0 | Timer C input capture, external interrupt, or comparator 1 input |
| 20 (P3_4) | I²C Data (SDA) | Open-drain bidirectional data line for I²C communication with EEPROMs or sensors |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash Support | Not present - R5F21164SP#U0 belongs to R8C/16 Group (no data flash); differs from R8C/17 Group's 2×1 KB data flash |
| Low-Power Modes | Wait mode (35 µA @ 3.0 V) and stop mode (0.7 µA @ 3.0 V) - enables battery-powered operation with fast wake-up |
| On-Chip Oscillators | Adjustable high-speed and low-speed on-chip oscillators - eliminates need for external crystals in cost-sensitive designs |
| LED Drive Capability | Four dedicated I/O pins (P1_0–P1_3) support direct LED sinking - reduces BOM count for status indicators |
| Robust Reset Architecture | Integrated power-on reset, voltage detection (VCA1/VCA2), oscillation stop detection, and watchdog timer - ensures reliable boot and fault recovery |
Applications
| Home Appliance Control | Office Equipment Interface |
|---|---|
|
Use Scenario: Microcontroller in washing machine control panel managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time motor control loops and ADC-based water level monitoring. Use Value: Integrated 10-bit ADC and 16-bit Timer C enable precise analog feedback and PWM-driven motor timing without external components. |
Use Scenario: Embedded controller in multifunction printer handling paper feed detection, toner level reporting, and button press response. IC Role / Device Role / Timing Role: Peripheral coordinator interfacing mechanical sensors (opto-interrupters), buttons (KI0–KI3), and display drivers. Use Value: Four LED drive ports (P1_0–P1_3) directly drive status LEDs; I²C interface connects to EEPROM for configuration storage. |
| Housing Security Sensor Node | Industrial Panel Meter |
|
Use Scenario: Battery-powered door/window contact sensor transmitting open/close events via UART to central hub. IC Role / Device Role / Timing Role: Low-power sensor node controller with wake-on-interrupt (INT0/INT3) and UART transmission duty cycling. Use Value: Stop mode current of 0.7 µA extends battery life; built-in voltage monitor prevents brown-out during transmission bursts. |
Use Scenario: Front-panel meter in HVAC control system displaying temperature, humidity, and fan speed with local adjustment buttons. IC Role / Device Role / Timing Role: Human-machine interface processor reading rotary encoder inputs (via P1_0–P1_3), driving 7-segment display, and updating LCD via UART. Use Value: Key input interrupt (KI0–KI3) supports debounce-free button scanning; UART and I²C allow dual-path communication with host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21164DSP#U0 | Same ROM/RAM, −40°C to +85°C extended temperature grade (D suffix), identical pinout and peripherals | Required for industrial environments with wider thermal cycling or outdoor housing exposure | Select R5F21164DSP#U0 when ambient operating temperature exceeds −20°C minimum specification. |
| R5F21174SP#U0 | Adds 2×1 KB data flash (1,000 write/erase cycles), otherwise identical package, pinout, and peripheral set | Enables field-upgradable calibration data storage or firmware parameter retention across power cycles | Choose R5F21174SP#U0 only if nonvolatile parameter storage beyond program ROM is required. |
Compared with R5F21164SP#U0, the R5F21164DSP#U0 offers extended temperature operation without design changes, while R5F21174SP#U0 adds data flash at the cost of reduced program ROM endurance - both require no PCB layout revision but differ in qualification scope and data retention capability.
Availability
R5F21164SP#U0 is available at Aetrix Electronics and suitable for home appliance control, office equipment interface, and housing security sensor nodes requiring stable component supply and long-term production continuity.
Supply support for R5F21164SP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.
The R5F21164SP#U0 belongs to the R8C/16 Group - a cost-optimized 16-bit MCU family designed for resource-constrained embedded control in consumer, office, and industrial equipment where flash density and analog integration outweigh data logging needs.
FAQ
What is the maximum operating frequency of the R5F21164SP#U0?
The R5F21164SP#U0 supports a maximum external clock frequency of 20 MHz on the XIN pin, achieving a 50 ns minimum instruction execution time under VCC = 3.0–5.5 V conditions. Its internal high-speed on-chip oscillator is factory-trimmed and adjustable, but rated lower than the crystal-driven mode.
Does the R5F21164SP#U0 include data flash memory?
No, the R5F21164SP#U0 does not include data flash memory. It belongs to the R8C/16 Group, which features only program flash ROM (16 KB). Data flash (1 KB × 2 blocks) is exclusive to the R8C/17 Group, such as the R5F21174SP#U0.
What are the key differences between R5F21164SP#U0 and R5F21164DSP#U0?
The R5F21164DSP#U0 is the extended temperature variant of the R5F21164SP#U0, qualified for −40°C to +85°C operation versus −20°C to +85°C. All electrical specifications, pinout, memory size, and peripheral functions are identical - only the ambient temperature rating differs.
Can the R5F21164SP#U0 operate from a 3.3 V supply?
Yes, the R5F21164SP#U0 operates across 2.7 V to 5.5 V, fully supporting 3.3 V nominal supply. At 3.0 V and 10 MHz XIN, typical active current is 5 mA; in stop mode, it draws just 0.7 µA - making it suitable for 3.3 V battery-backed systems.
Which pins on the R5F21164SP#U0 support LED driving?
Pins P1_0, P1_1, P1_2, and P1_3 on the R5F21164SP#U0 are designated as LED drive ports. Each supports sink-current operation up to 20 mA per pin, enabling direct connection of common-anode LEDs without external drivers or current-limiting resistors in many cases.
R5F21164SP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/16
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, SIO, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21164SP#U0 FAQ
1.How can I place an order for R5F21164SP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21164SP#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 R5F21164SP#U0 reliable?
The price and inventory of R5F21164SP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21164SP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21164SP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21164SP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21164SP#U0?
R5F21164SP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21164SP#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 R5F21164SP#U0?
For technical support, including R5F21164SP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21164SP#U0 requirements.
6.How does Aetrix verify that R5F21164SP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21164SP#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 R5F21164SP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21164SP#U0?
All R5F21164SP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21164SP#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 R5F21164SP#U0 part is unused and in its original packaging.
Return procedure for R5F21164SP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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