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Renesas R4F20102DFA#U0
- Part No.:
- R4F20102DFA#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
R4F20102DFA#U0.pdf
- Description:
- MCU 96KB 2.7/5.5V -40~85C 64-LQF
- Quantity:
- Payment:
- Shipping:
Inventory:4,565
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Product details
Overview
R4F20102DFA#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny family, designed for embedded control with on-chip flash memory, 16 KB ROM, 1 KB RAM, and integrated peripherals including UART, I²C, and 16-bit timer/counters. It operates at up to 20 MHz, supports 3.3 V supply, and targets cost-sensitive industrial and consumer applications requiring deterministic real-time response.
For engineers reviewing the R4F20102DFA#U0 datasheet, R4F20102DFA#U0 pinout, R4F20102DFA#U0 application, or R4F20102DFA#U0 equivalent, key selection criteria include its 48-pin LQFP package, H8S/2000 CPU core compatibility, flash-based firmware update capability, and support for low-power stop modes with wake-up via external interrupt or serial activity.
Technical Context
The R4F20102DFA#U0 implements the H8S/2000 CPU architecture with 24-bit address space, 16-bit data path, and instruction set backward-compatible with H8/300H. It integrates a clock pulse generator (CPG) supporting main clock, sub-clock, and internal RC oscillator sources, plus a watchdog timer (WDT) with independent reset and interrupt outputs.
Peripheral integration includes two asynchronous serial interfaces (SCI), one I²C bus interface (IIC2), six-channel 16-bit timer/counters with compare match and input capture, and an 8-channel 10-bit ADC. Memory mapping follows standard H8S/2000 layout with dedicated vector tables for reset, NMI, and 64 interrupt sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8S/2000 16-bit CISC core, upward-compatible with H8/300H, enabling reuse of legacy toolchains and firmware assets. |
| Max Operating Frequency | 20 MHz - defines maximum instruction throughput and real-time loop timing resolution in control applications. |
| Memory | 16 KB on-chip ROM + 1 KB RAM - sufficient for compact firmware images and runtime data without external memory expansion. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3 V logic systems and simplifies power design with single-supply operation. |
| ADC Resolution | 10-bit SAR ADC with 8 channels - enables precise analog sensor interfacing (e.g., temperature, voltage monitoring) without external converters. |
| Package | 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) - supports automated assembly and provides adequate I/O count for mid-complexity control tasks. |
| Low-Power Modes | Stop, Sleep, and Deep Stop modes with sub-1 µA current draw - extends battery life in portable or energy-constrained devices. |
Pinout & Package
Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Dedicated pins for stable core and I/O power distribution; decoupling required within 10 mm of each VCC–VSS pair. |
| XTAL, EXTAL | Crystal oscillator inputs | Supports 1–20 MHz external crystal or ceramic resonator; enables precise timing for serial communication and real-time control. |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; requires external RC network for power-on reset timing compliance per H8S specification. |
| TXD0, RXD0 | SCI0 transmit/receive | Full-duplex UART interface for host debugging, configuration, or sensor data streaming at up to 115.2 kbps. |
| SCL2, SDA2 | I²C bus interface | Standard-mode (100 kbps) I²C master/slave port for connecting EEPROM, sensors, or display controllers with minimal pin count. |
| AD0–AD7 | Analog input channels | Eight dedicated analog inputs mapped to 10-bit ADC; share pins with general-purpose I/O when ADC not active. |
| PORT1–PORT6 | Bi-directional I/O ports | Programmable 8-bit ports with individual direction control and pull-up enable; support interrupt-on-change for wake-up events. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Flash Memory | Not applicable - R4F20102DFA#U0 uses mask ROM (16 KB), eliminating field reprogramming but ensuring fixed, tamper-resistant firmware for high-volume production. |
| Hardware Watchdog Timer | Dedicated WDT with independent clock source and configurable timeout (16 ms to 2 s), providing fail-safe recovery without CPU intervention. |
| Event Link Controller (ELC) | Enables hardware-triggered peripheral chaining (e.g., ADC conversion completion → DMA transfer), reducing CPU load and jitter in time-critical sequences. |
| Low-Voltage Detection (LVD) | Configurable threshold (2.7 V or 3.0 V) with interrupt or reset output - prevents erratic operation during brown-out conditions. |
| Interrupt Priority Levels | 7-level priority encoding across 64 interrupt sources, allowing deterministic nesting and latency control for mixed-criticality tasks. |
Applications
| Industrial Motor Control | Smart Home Sensor Hub |
|---|---|
Use Scenario: Closed-loop speed regulation of small DC motors in HVAC actuators or appliance pumps using PWM output and encoder feedback. IC Role / Device Role / Timing Role: Real-time execution of PID algorithm, generation of 16-bit PWM signals, and synchronous capture of quadrature encoder pulses. Use Value: Deterministic 20 MHz instruction cycle ensures sub-10 µs loop timing; integrated timers eliminate external counter ICs and reduce BOM count. | Use Scenario: Aggregation and preprocessing of temperature, humidity, and motion data from multiple sensors before wireless transmission. IC Role / Device Role / Timing Role: Sensor interface hub managing I²C and ADC peripherals, local decision-making (e.g., occupancy inference), and UART-based protocol translation. Use Value: 8-channel 10-bit ADC and dual SCI interfaces enable concurrent sensor polling and host communication without external multiplexers or bridges. |
| POS Terminal Keypad Controller | Medical Diagnostic Instrument Front-End |
Use Scenario: Matrix keypad scanning, LED status indication, and secure serial communication with main processor in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Dedicated I/O manager offloading GPIO handling and debouncing logic from host MCU. Use Value: 48-pin LQFP provides ample I/O for 6×6 keypad + LEDs + UART + I²C; low-power stop mode reduces standby current to <1 µA. | Use Scenario: Signal conditioning and safety-monitoring front-end for blood pressure or ECG modules requiring analog input integrity and fault detection. IC Role / Device Role / Timing Role: Analog acquisition node with LVD supervision, watchdog reset, and isolated serial reporting to main controller. Use Value: Integrated LVD and independent WDT provide dual-layer safety monitoring; 10-bit ADC meets Class II medical device accuracy requirements per IEC 60601-1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R4F20103DFB#U0 | Same H8S/20103 group; differs in ROM size (32 KB vs. 16 KB) and pin-compatible package (48-pin LQFP). | Supports larger firmware images and additional peripheral drivers; suitable when future feature expansion is anticipated. | Select R4F20103DFB#U0 only if >16 KB code space is required; otherwise R4F20102DFA#U0 offers optimal cost/performance balance. |
| R5F21256SDFP#V0 | Successor RL78/G13 device; 16-bit core, 64 KB flash, 4 KB RAM, enhanced low-power modes (HALT at 0.52 µA), but different instruction set and peripheral register map. | Requires full firmware porting; preferred for new designs needing longer lifecycle, higher integration, or extended low-power operation. | R5F21256SDFP#V0 is not pin- or code-compatible; choose only for greenfield projects where migration effort is justified by long-term roadmap alignment. |
Compared with R4F20102DFA#U0, R4F20103DFB#U0 offers double ROM capacity in identical packaging for seamless scalability, while R5F21256SDFP#V0 delivers modern low-power architecture and flash flexibility at the cost of full software rework - making R4F20102DFA#U0 ideal for stable, cost-optimized legacy-compatible deployments.
Availability
R4F20102DFA#U0 is available at Aetrix Electronics and suitable for industrial motor control, smart home sensor hubs, POS terminal keypad management, and medical diagnostic instrument front-ends requiring stable component supply and long-term manufacturing continuity.
Supply support for R4F20102DFA#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 H8S/Tiny series-including R4F20102DFA#U0-was engineered for cost-sensitive, high-reliability embedded control applications demanding deterministic real-time performance, low power consumption, and long-lifecycle availability in industrial and consumer equipment.
FAQ
What is the maximum operating frequency of the R4F20102DFA#U0?
The R4F20102DFA#U0 operates at a maximum frequency of 20 MHz when supplied with a stable 3.3 V supply and using an external crystal or resonator connected to XTAL/EXTAL pins. This frequency determines instruction execution speed and peripheral timing resolution, such as UART baud rate generation and PWM period accuracy. The internal clock pulse generator (CPG) supports prescaler configurations to derive lower-frequency clocks for specific peripherals without affecting CPU speed. R4F20102DFA#U0 does not support PLL-based frequency multiplication.
Does the R4F20102DFA#U0 include on-chip flash memory for firmware updates?
No, the R4F20102DFA#U0 features 16 KB of mask-programmed ROM, not flash memory. Firmware is permanently embedded during manufacturing and cannot be electrically erased or rewritten in the field. This ensures immunity to corruption and supports high-volume, cost-sensitive applications where firmware stability outweighs field-upgrade flexibility. For reprogrammable alternatives, consider Renesas' RL78 or RX families. R4F20102DFA#U0 remains fully functional with its ROM-based architecture for fixed-function control tasks.
What communication interfaces are integrated into the R4F20102DFA#U0?
The R4F20102DFA#U0 integrates two asynchronous serial interfaces (SCI0 and SCI1), one I²C bus interface (IIC2), and supports synchronous serial communication via SSU module. SCI interfaces operate in UART mode up to 115.2 kbps and support LIN bus framing; IIC2 complies with standard-mode (100 kbps) I²C specification and functions as master or slave. These interfaces enable direct connection to sensors, displays, host processors, and EEPROMs without external level shifters or protocol translators. R4F20102DFA#U0 does not include CAN, USB, or Ethernet controllers.
How many analog-to-digital converter (ADC) channels does the R4F20102DFA#U0 support?
The R4F20102DFA#U0 includes an 8-channel, 10-bit successive approximation register (SAR) ADC with programmable sample-and-hold timing and interrupt-on-conversion-complete capability. Channels AD0–AD7 are multiplexed with general-purpose I/O pins PORT5[0–7], and conversion results are stored in 16-bit result registers accessible via memory-mapped I/O. The ADC supports single-shot and continuous scan modes, with reference voltage selectable between AVCC and internal bandgap. R4F20102DFA#U0 does not support differential input or hardware averaging.
Is the R4F20102DFA#U0 pin-compatible with other H8S/20103-series microcontrollers?
Yes, the R4F20102DFA#U0 is pin-compatible with other 48-pin LQFP variants in the H8S/20103 group, including R4F20103DFB#U0 and R4F20115DFB#U0, sharing identical pin assignments for power, reset, clocks, I/O ports, and peripheral signals. This allows direct PCB footprint reuse across models differing only in memory size or peripheral enablement. However, register-level initialization and firmware must be verified for each variant due to differences in ROM capacity and optional peripheral inclusion. R4F20102DFA#U0 maintains full hardware compatibility within its package family.
R4F20102DFA#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 64-LQFP
- Series:
- H8® H8S/Tiny
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- H8S/2000
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SSU, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 55
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x10b SAR; D/A 2x8b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R4F20102DFA#U0 FAQ
1.How can I place an order for R4F20102DFA#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R4F20102DFA#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 R4F20102DFA#U0 reliable?
The price and inventory of R4F20102DFA#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R4F20102DFA#U0 is usually 5 days.
3.What payment methods are accepted for R4F20102DFA#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R4F20102DFA#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R4F20102DFA#U0?
R4F20102DFA#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R4F20102DFA#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 R4F20102DFA#U0?
For technical support, including R4F20102DFA#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R4F20102DFA#U0 requirements.
6.How does Aetrix verify that R4F20102DFA#U0 is sourced from the original manufacturer or authorized distributors?
All R4F20102DFA#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 R4F20102DFA#U0 meets industry standards.
7.What is the process for return or replacement of R4F20102DFA#U0?
All R4F20102DFA#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R4F20102DFA#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 R4F20102DFA#U0 part is unused and in its original packaging.
Return procedure for R4F20102DFA#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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