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Renesas DF38124HWV
- Part No.:
- DF38124HWV
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-BQFP
- Datasheet:
-
DF38124HWV.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,766
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Product details
Overview
DF38124HWV from Renesas Electronics is an 8-bit single-chip microcontroller in the H8/38124 Group, built on the H8/300L Super Low Power CPU core. It integrates 32 KB flash ROM, 1 KB RAM, 10-bit ADC (8 channels), LCD controller (32 seg × 4 com), UART/SCI, four 16-bit timers (A/C/F/G), WDT, and 66 I/O pins (50 I/O + 6 output-only + 9 input-only) in a TFP-80C package. It operates from 2.7–3.6 V at up to 10 MHz and targets low-power industrial control and display-integrated embedded systems.
For engineers reviewing the DF38124HWV datasheet, DF38124HWV pinout, DF38124HWV application, or DF38124HWV equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support tailored for production-grade embedded development.
Technical Context
The DF38124HWV implements the H8/300L CPU core with 16-bit internal data paths and Harvard architecture for instruction/data separation. It supports on-chip flash programming via on-chip emulator interface using pins OSC1/OSC2 and dedicated debug pins (e.g., pin 95 reserved for emulator use).
Its peripheral set includes a synchronous/asynchronous SCI module supporting UART mode, a 10-bit successive-approximation ADC with 8 analog inputs and sample-and-hold, and an integrated LCD controller driving up to 128 segments with 4 commons-enabling direct segment-combination drive without external bias circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8/300L 8-bit RISC core with 16-bit ALU and 24-bit address space - enables efficient control code execution and access to full 16 MB memory map. |
| Flash ROM | 32 KB on-chip flash memory - supports in-system reprogramming and field firmware updates without external programmer. |
| RAM | 1 KB on-chip SRAM - sufficient for real-time stack, variables, and small buffers in sensor/control applications. |
| ADC | 10-bit resolution × 8 input channels - provides adequate dynamic range for temperature, voltage, and current sensing in industrial interfaces. |
| LCD Controller | 32-segment × 4-common driver - directly drives multiplexed LCD panels up to 128 segments, eliminating need for external LCD driver IC. |
| Operating Voltage | 2.7–3.6 V - optimized for single-cell Li-ion or 3.3 V regulated supply, reducing BOM count in portable/battery-powered designs. |
| Max Clock Frequency | 10 MHz at 2.7–3.6 V - balances processing throughput and ultra-low active current (typ. 2.5 mA @ 10 MHz, 3.3 V). |
| Package | TFP-80C (80-pin thin fine-pitch QFP, 12 mm × 12 mm, 0.5 mm pitch) - compact footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
DF38124HWV is housed in the TFP-80C package: 80-pin thin fine-pitch QFP, 12 mm × 12 mm body, 0.5 mm lead pitch, exposed thermal pad (non-electrical), compliant with JEDEC MO-220.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Dual VCC/VSS pairs (pins 1–2, 79–80) ensure stable core voltage distribution and reduce noise coupling in mixed-signal operation. |
| OSC1, OSC2 | Crystal oscillator input/output | Supports external crystal (1–10 MHz) or ceramic resonator; required even when using on-chip oscillator during on-chip emulation. |
| RESET | Active-low reset input | Asynchronous reset pin accepting CMOS-level signal; internal pull-up ensures defined startup state if left unconnected. |
| TXD0, RXD0 | SCI0 transmit/receive | Full-duplex UART interface pins - enable serial communication with host MCU, PC, or modem without level-shifting at 3.3 V logic. |
| SEG0–SEG31, COM0–COM3 | LCD segment/common drivers | Dedicated CMOS output pins configured as segment or common lines - drive LCD glass directly with internal bias generation. |
| AD0–AD7 | Analog input channels | Eight dedicated analog input pins with internal sample-and-hold - accept DC or low-frequency AC signals up to VCC reference. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip flash memory | Enables zero-cost firmware updates in end equipment and eliminates external EEPROM/flash for configuration storage. |
| Integrated LCD controller | Reduces system component count by driving 128-segment displays directly - no external driver IC or bias network required. |
| Low-voltage operation (2.7–3.6 V) | Allows direct connection to single Li-ion cell or standard 3.3 V regulator - simplifies power architecture in portable devices. |
| On-chip emulator interface | Permits full-speed debugging and flash programming via dedicated pins (OSC1/OSC2 + pin 95), eliminating need for external JTAG pod. |
| 10-bit 8-channel ADC | Provides sufficient resolution for closed-loop control of motors, sensors, and power supplies without external ADC IC. |
Applications
| Industrial Panel Meters | Smart Thermostats |
|---|---|
|
Use Scenario: Digital panel meter measuring voltage, current, or temperature with local LCD readout and serial output. IC Role / Device Role / Timing Role: Main system controller executing measurement algorithms, driving 4-digit LCD, and managing RS-232/485 communication via SCI. Use Value: On-chip 10-bit ADC and LCD controller eliminate two external ICs; 32 KB flash accommodates calibration tables and protocol stacks. |
Use Scenario: Battery-powered HVAC controller with ambient temperature/humidity sensing, user interface, and wireless gateway connectivity. IC Role / Device Role / Timing Role: Primary MCU handling sensor acquisition, PID control, LCD refresh, and UART-to-Bluetooth bridge logic. Use Value: 2.7–3.6 V operation extends battery life; integrated WDT and LVD ensure reliable recovery from brownout conditions. |
| Programmable Logic Controllers (Micro-PLC) | Portable Test Equipment |
|
Use Scenario: DIN-rail mounted micro-PLC with discrete I/O, analog inputs, and LCD status display for factory floor monitoring. IC Role / Device Role / Timing Role: Real-time control engine executing ladder logic, scanning I/O, updating display, and logging events to flash. Use Value: 66 GPIOs support flexible I/O expansion; on-chip flash stores user programs and retains settings across power cycles. |
Use Scenario: Handheld multimeter or insulation tester with digital display, button interface, and PC upload capability. IC Role / Device Role / Timing Role: System-on-chip managing auto-ranging ADC, LCD rendering, keypad scan, and USB/UART data transfer. Use Value: Single-chip integration reduces size and power vs. multi-IC solutions; 1 KB RAM suffices for real-time sampling buffers and UI state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| H8/38124HFP | Same core, same peripherals, but in FP-80A package (standard QFP, 0.65 mm pitch) - larger footprint, easier hand-soldering. | Preferred for prototyping or low-volume production where TFP-80C's 0.5 mm pitch poses assembly challenges. | Select H8/38124HFP when board assembly uses standard pitch tooling or requires higher thermal mass for rework. |
| H8/38024RFP | Mask ROM variant (32 KB ROM, no flash); lacks on-chip emulator; different voltage range (4.5–5.5 V, 16 MHz). | Suitable only for cost-sensitive, high-volume fixed-function applications where firmware never changes post-manufacture. | Choose H8/38024RFP only if firmware is immutable and 5 V supply is available - not a drop-in replacement for DF38124HWV. |
Compared with H8/38124HFP, DF38124HWV offers finer pitch and smaller area but requires advanced SMT capability; versus H8/38024RFP, it trades mask-ROM cost savings for field-upgradable flash and low-voltage operation - making DF38124HWV optimal for flexible, battery-powered designs requiring firmware agility.
Availability
DF38124HWV is available at Aetrix Electronics and suitable for industrial panel meters, smart thermostats, micro-PLCs, and portable test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DF38124HWV 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 infrastructure markets.
The H8/38124 Group belongs to the H8/300L Super Low Power Series - designed specifically for cost-sensitive, battery-operated, and display-integrated embedded control applications demanding flash programmability and integrated peripherals.
FAQ
What is the operating voltage range of the DF38124HWV?
The DF38124HWV operates from 2.7 V to 3.6 V. This narrow, low-voltage range is optimized for single-cell lithium-ion or regulated 3.3 V supplies, enabling ultra-low power consumption in portable and energy-conscious applications. Operation outside this range may cause functional failure or damage. The DF38124HWV does not support 5 V operation - unlike earlier H8/38024 variants.
Does the DF38124HWV include an integrated LCD controller, and what is its drive capability?
Yes, the DF38124HWV integrates a full LCD controller supporting up to 32 segments and 4 commons (128 segments total). It provides internal bias generation and CMOS-level outputs, allowing direct connection to static or multiplexed LCD glass without external driver ICs or resistor networks. This capability is confirmed in the H8/38124 Group Hardware Manual Rev. 8.00, Section 1.1 and electrical characteristics table.
Can the DF38124HWV be programmed and debugged in-circuit?
Yes, the DF38124HWV supports on-chip emulation via dedicated pins (OSC1, OSC2, and pin 95), enabling full-speed debugging, flash programming, and real-time trace without external emulators. However, pin 95 is reserved exclusively for emulator use and cannot serve dual functions. Pins 33–35 are also restricted during emulation per Renesas Hardware Manual Rev. 8.00, Section "Notes on H8/38124 programming and debugging".
What is the maximum clock frequency supported by the DF38124HWV, and under what conditions?
The DF38124HWV supports a maximum operating frequency of 10 MHz when powered from 2.7–3.6 V. This is specified in the "Specifications" table of the H8/38124 Group Hardware Manual Rev. 8.00 (Page vi). Higher frequencies (e.g., 16 or 20 MHz) apply only to other members of the H8/38xxx family with different voltage ranges - they are not valid for DF38124HWV.
Is the DF38124HWV pin-compatible with other H8/38124 variants such as the H8/38124HFP?
No, the DF38124HWV is not pin-compatible with H8/38124HFP. DF38124HWV uses the TFP-80C package (0.5 mm pitch), while H8/38124HFP uses FP-80A (0.65 mm pitch). Although both have 80 pins and identical signal assignments, the mechanical layout, pad dimensions, and pitch differ - requiring separate PCB footprints. Renesas documentation confirms no pin-to-pin compatibility between these packages.
DF38124HWV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-BQFP
- Series:
- H8® H8/300L SLP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- H8/300L
- Core Size:
- 8-Bit
- Speed:
- 10MHz
- Connectivity:
- SCI
- Peripherals:
- LCD, POR, PWM, WDT
- Number of I/O:
- 50
- Program Memory Size:
- 32KB (32K 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 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DF38124HWV FAQ
1.How can I place an order for DF38124HWV through Aetrix?
Please submit a Request for Quotation (RFQ) for DF38124HWV 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 DF38124HWV reliable?
The price and inventory of DF38124HWV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF38124HWV is usually 5 days.
3.What payment methods are accepted for DF38124HWV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF38124HWV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF38124HWV?
DF38124HWV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF38124HWV 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 DF38124HWV?
For technical support, including DF38124HWV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF38124HWV requirements.
6.How does Aetrix verify that DF38124HWV is sourced from the original manufacturer or authorized distributors?
All DF38124HWV 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 DF38124HWV meets industry standards.
7.What is the process for return or replacement of DF38124HWV?
All DF38124HWV units undergo pre-shipment inspection (PSI). If there is an issue with DF38124HWV, 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 DF38124HWV part is unused and in its original packaging.
Return procedure for DF38124HWV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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