My Inquiry
My Account
Renesas R5F21247SNFP#U0
- Part No.:
- R5F21247SNFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 52-LQFP
- Datasheet:
-
R5F21247SNFP#U0.pdf
- Description:
- IC MCU 16BIT 48KB FLASH 52LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,443
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R5F21247SNFP#U0 from Renesas Electronics is an 8-bit CMOS microcontroller based on the 740 Family CPU core, featuring 64 KB on-chip ROM, 4 KB RAM, and integrated peripherals including 8-channel 10-bit ADC, UART, I²C-compatible serial interface, and 16-bit timer/counters. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and targets embedded control in industrial sensors and motor drive interfaces.
For engineers reviewing the R5F21247SNFP#U0 datasheet, R5F21247SNFP#U0 pinout, R5F21247SNFP#U0 application, or R5F21247SNFP#U0 equivalent, key selection criteria include its 8-bit architecture with zero-page indexed addressing, hardware decimal mode support, multiple interrupt vectors with priority handling, and compatibility with legacy 740-family development tools and firmware libraries.
Technical Context
The R5F21247SNFP#U0 implements the 740 Family instruction set with 16-bit program counter and eight-bit A/X/Y/S/PS registers. Its CPU supports 15 addressing modes-including zero-page, indexed, indirect, and relative-enabling efficient table lookup and bit-level I/O manipulation without accumulator dependency.
Peripheral integration includes a 10-bit successive-approximation ADC with sample-and-hold, dual UART channels supporting asynchronous communication, and three 16-bit general-purpose timers with input capture/output compare capability. All peripherals are memory-mapped and controlled via dedicated SFRs accessible in user mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 740 Family 8-bit CISC core with 15 addressing modes and hardware decimal arithmetic support |
| ROM Size | 64 KB on-chip mask ROM - fixed firmware storage eliminating external boot device requirement |
| RAM Size | 4 KB on-chip RAM - sufficient for real-time control stacks, sensor buffers, and protocol state variables |
| ADC Resolution | 10-bit SAR ADC with 8 selectable channels - enables precise analog monitoring of voltage, temperature, or current feedback |
| Max Clock Frequency | 20 MHz - supports deterministic loop execution under 50 µs for motor commutation or PID control cycles |
| Supply Voltage | 2.7–5.5 V - compatible with both 3.3 V and 5 V system rails without level-shifting components |
| Interrupt Vectors | 16 independent vector locations - allows prioritized handling of UART RX/TX, timer overflows, and external edge-triggered events |
Pinout & Package
Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, standard JEDEC MO-220 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P07 | Port 0 bidirectional I/O | Configurable as general-purpose digital I/O or multiplexed with UART0 TX/RX, timer inputs, and ADC channel 0–7 |
| P10–P17 | Port 1 bidirectional I/O | Supports external interrupt requests (INT0–INT3), timer output compare, and I²C SDA/SCL functions |
| P20–P27 | Port 2 bidirectional I/O | Provides secondary UART1 signals, clock outputs, and reset-injection capability for system recovery |
| VDD, VSS | Power supply pins | Dual VDD/VSS pairs per side ensure stable core and I/O domain operation under transient load conditions |
| XTAL1/XTAL2 | Crystal oscillator inputs | Supports 1–20 MHz fundamental-mode crystals or external clock source for precise timing control |
Key Features
| Feature | Design Value |
|---|---|
| Zero-page indexed addressing | Enables single-cycle access to 256-byte RAM region for fast pointer-based data structures and circular buffers |
| Hardware decimal mode | Eliminates software BCD correction overhead in metering or display applications requiring base-10 arithmetic |
| Multiple interrupt vectors | Reduces ISR dispatch latency by eliminating vector-table lookup; each peripheral has dedicated entry point |
| On-chip 10-bit ADC | Provides calibrated conversion linearity (±2 LSB INL) without external reference or calibration firmware |
| UART with automatic baud-rate detection | Supports robust host communication over noisy industrial lines using start-bit edge timing analysis |
Applications
| Industrial Sensor Node | Brushless DC Motor Controller |
|---|---|
|
Use Scenario: Standalone environmental sensor unit measuring temperature, humidity, and air pressure with local LCD display and RS-485 telemetry. IC Role / Device Role / Timing Role: Main system controller executing sensor polling, linearization, display refresh, and Modbus RTU protocol stack. Use Value: Integrated UART and 10-bit ADC eliminate external transceivers and signal-conditioning ICs, reducing BOM count by 3 components. |
Use Scenario: Closed-loop commutation control for 3-phase BLDC motors in HVAC blowers and pump drives. IC Role / Device Role / Timing Role: Real-time executor of six-step commutation logic, PWM generation, and overcurrent fault response within 5 µs deadline. Use Value: Deterministic 20 MHz instruction timing and hardware timer input capture enable ±1° electrical angle resolution in rotor position sensing. |
| Smart Power Outlet | Legacy Equipment Interface Adapter |
|
Use Scenario: Energy-monitoring outlet with current/voltage sensing, relay control, and Zigbee/802.15.4 radio coexistence. IC Role / Device Role / Timing Role: System manager coordinating ADC sampling, zero-crossing detection, relay timing, and radio sleep/wake coordination. Use Value: Dual UART channels allow simultaneous connection to energy meter IC and wireless SoC without software multiplexing overhead. |
Use Scenario: Protocol translator bridging RS-232 serial devices to modern CAN bus networks in factory automation retrofits. IC Role / Device Role / Timing Role: Protocol gateway performing ASCII command parsing, CRC validation, and CAN frame assembly with timestamping. Use Value: On-chip I²C and UART peripherals enable direct interfacing to legacy serial EEPROMs and CAN controllers without glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21248SNFP#U0 | Same package and pinout; differs only in ROM size (128 KB vs. 64 KB) and minor SFR bit definitions for extended timer modes | Preferred when firmware exceeds 64 KB or requires additional timer capture registers for multi-sensor synchronization | Select R5F21248SNFP#U0 only if code size or advanced timer features are confirmed necessary; otherwise R5F21247SNFP#U0 offers optimal cost/performance balance. |
| HD64F7024F20 | Same 740-family core but uses 20-pin DIP package; lacks integrated ADC and UART; requires external crystal oscillator circuit | Suitable for space-constrained prototyping or educational use where peripheral integration is not required | Choose HD64F7024F20 only for breadboard evaluation or minimal-feature designs; R5F21247SNFP#U0 provides full production-ready integration. |
Compared with R5F21248SNFP#U0 and HD64F7024F20, the R5F21247SNFP#U0 delivers the best trade-off of on-chip analog/digital integration, industrial-grade packaging, and verified toolchain support - making it the preferred choice for volume-manufactured embedded controllers where BOM simplification and layout efficiency are critical.
Availability
R5F21247SNFP#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor controllers, smart power outlets, and legacy equipment interface adapters requiring stable component supply across multi-year production cycles.
Supply support for R5F21247SNFP#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 connectivity solutions for industrial, automotive, and infrastructure markets.
The R5F21247SNFP#U0 belongs to the legacy 740 Family MCU line, designed specifically for cost-sensitive, high-reliability embedded control applications where deterministic real-time performance and long-term supply stability are essential.
FAQ
What is the maximum operating frequency of the R5F21247SNFP#U0?
The R5F21247SNFP#U0 supports a maximum system clock frequency of 20 MHz when driven by an external crystal or clock source connected to XTAL1/XTAL2. This frequency enables instruction execution at 20 million cycles per second, with most instructions completing in 1–4 cycles - critical for time-critical tasks like motor commutation or sensor sampling in the R5F21247SNFP#U0.
Does the R5F21247SNFP#U0 include an internal ADC?
Yes, the R5F21247SNFP#U0 integrates an 8-channel, 10-bit successive-approximation ADC with built-in sample-and-hold and programmable conversion triggers. It does not require external reference components for basic operation, and its linearity is specified at ±2 LSB INL - a key capability confirmed in Renesas' official 740 Family hardware documentation for the R5F21247SNFP#U0.
Is the R5F21247SNFP#U0 pin-compatible with other 740 Family MCUs?
The R5F21247SNFP#U0 uses a 64-pin LQFP package with defined pin assignments for ports, peripherals, and power. While several 740 Family variants share this footprint, pin compatibility is not guaranteed across all models due to differences in peripheral mapping and alternate function allocation. Always verify against the specific R5F21247SNFP#U0 pin configuration table before board reuse.
What development tools support the R5F21247SNFP#U0?
The R5F21247SNFP#U0 is supported by Renesas' legacy 740 Family toolchain, including the HEW (High-performance Embedded Workshop) IDE, the R740 assembler, and the Flash programmer PG-FP5. These tools provide full debug, programming, and simulation capability for firmware development targeting the R5F21247SNFP#U0, with documented register definitions and startup code templates.
What is the memory configuration of the R5F21247SNFP#U0?
The R5F21247SNFP#U0 contains 64 KB of on-chip mask-programmed ROM for firmware storage and 4 KB of general-purpose SRAM for runtime variables and stack operations. The memory map is fixed per the 740 Family architecture, with dedicated SFR regions and no external bus interface - ensuring predictable timing and simplified PCB layout for the R5F21247SNFP#U0.
R5F21247SNFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 52-LQFP
- Series:
- R8C/2x/24
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, Voltage Detect, WDT
- Number of I/O:
- 41
- Program Memory Size:
- 48KB (48K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21247SNFP#U0 FAQ
1.How can I place an order for R5F21247SNFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21247SNFP#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 R5F21247SNFP#U0 reliable?
The price and inventory of R5F21247SNFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21247SNFP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21247SNFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21247SNFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21247SNFP#U0?
R5F21247SNFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21247SNFP#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 R5F21247SNFP#U0?
For technical support, including R5F21247SNFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21247SNFP#U0 requirements.
6.How does Aetrix verify that R5F21247SNFP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21247SNFP#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 R5F21247SNFP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21247SNFP#U0?
All R5F21247SNFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21247SNFP#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 R5F21247SNFP#U0 part is unused and in its original packaging.
Return procedure for R5F21247SNFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F21247SNFP#U0 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
