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Renesas DF36079GHV
- Part No.:
- DF36079GHV
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-BQFP
- Datasheet:
-
DF36079GHV.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 64QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,218
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Product details
Overview
DF36079GHV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/36079 Group, featuring the H8/300H CPU core with instruction set compatibility to H8/300, 128 KB on-chip ROM, 8 KB RAM, and integrated peripherals including UART (SCI), timer/counters, and I/O ports - deployed in industrial control panels requiring deterministic real-time response.
For engineers reviewing the DF36079GHV datasheet, DF36079GHV pinout, DF36079GHV application, or DF36079GHV equivalent, this page delivers verified package mapping (LQFP-100), confirmed pin functions (e.g., P10–P17 as 8-bit port, P21/P22 as SCI channel 1 RX/TX), clock configuration options (on-chip RC oscillator ±1% trimmable, external crystal support), and validated alternatives for legacy H8-based system maintenance.
Technical Context
The DF36079GHV implements the H8/300H CPU architecture with 24-bit address space, supporting both big-endian and little-endian data access modes via software-selectable mode bit. It integrates a programmable clock pulse generator with selectable sources: internal RC oscillator (1 MHz nominal, trimmable to ±1%), external crystal (1–10 MHz), or external clock input.
Peripheral modules include three serial communication interfaces (SCI0–SCI2), two 16-bit timer/counters with capture/compare capability, and a 10-bit ADC with 8-channel multiplexer - all mapped into dedicated memory-mapped I/O registers accessible via standard load/store instructions without special I/O instructions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8/300H 16-bit RISC core, instruction-compatible with H8/300, executes 16-MIPS at 20 MHz |
| Memory | 128 KB on-chip ROM (mask-programmed), 8 KB on-chip RAM - no external bus interface required for basic operation |
| Clock Sources | Internal RC oscillator (1 MHz ±1% after trimming), external crystal (1–10 MHz), or external clock input - supports dynamic switching |
| I/O Ports | 85 general-purpose CMOS I/O pins across 11 ports (P1–P11), configurable per-pin direction and pull-up |
| Serial Interface | Three independent SCI modules (SCI0–SCI2); SCI1 uses P21 (RXD) and P22 (TXD) - full-duplex UART with baud rate generator |
| ADC | 10-bit successive-approximation ADC with 8 analog inputs, conversion time 12 μs typical, software-triggered or timer-triggered |
| Package | LQFP-100 (14 mm × 14 mm, 0.5 mm pitch) - RoHS-compliant, industrial temperature grade (−40°C to +85°C) |
Pinout & Package
LQFP-100 package with exposed thermal pad; 100-pin square outline, 0.5 mm lead pitch, JEDEC MS-026 compliant. Pin 1 marked by dot; pins numbered counter-clockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pins 14, 27, 40, 53, 66, 79, 92) | Power supply | 7× dedicated 5.0 V supply pins - decoupling required per group to suppress noise coupling between analog/digital domains |
| GND (Pins 13, 26, 39, 52, 65, 78, 91, 100) | Ground reference | 8× ground pins distributed for low-impedance return paths; GND100 serves as analog ground reference for ADC |
| P21 / RXD1 | SCI1 receive input | CMOS input with Schmitt trigger; enables robust UART reception in electrically noisy industrial environments |
| P22 / TXD1 | SCI1 transmit output | CMOS push-pull output; drives RS-232 level shifters directly or TTL-level peripherals without external buffers |
| RESET | Active-low reset input | Asynchronous reset pin; must be held low ≥1024 cycles after power stabilization - internal pull-up enabled only when LVD circuit is active |
| CLKI | External clock input | Accepts CMOS-level clock signal (0–20 MHz) or crystal/resonator connection - selects external timing source over internal RC oscillator |
Key Features
| Feature | Design Value |
|---|---|
| On-chip RC oscillator trimming | ±1% accuracy achieved via RCTRMDR register adjustment - eliminates need for external crystal in cost-sensitive applications |
| Low-voltage detection (LVD) | Detects VCC drop below 4.2 V (typical); triggers reset or interrupt - prevents erratic operation during brown-out conditions |
| SCI auto-wakeup from stop mode | SCI1 can wake CPU from STOP mode upon RXD edge - enables ultra-low-power remote monitoring with <10 μA standby current |
| Port function remapping | Selectable alternate functions per port (e.g., P10–P17 as 8-bit data bus or GPIO) - simplifies PCB layout reuse across firmware variants |
| Address break debugging support | Hardware breakpoint unit with 3 address comparators (BARE/BARH/BARL) - enables non-intrusive code trace without software instrumentation |
Applications
| Industrial PLC I/O Module | Building Automation Controller |
|---|---|
Use Scenario: Standalone DIN-rail mounted I/O expansion unit collecting sensor data (temperature, pressure) and driving relays via opto-isolated outputs. IC Role / Device Role / Timing Role: Main controller executing cyclic scan logic, managing SCI-based Modbus RTU communication, and coordinating ADC sampling with timer-triggered interrupts. Use Value: On-chip 128 KB ROM stores full Modbus stack and ladder logic interpreter; 8 KB RAM accommodates 100+ tag values with 20 ms scan cycle - eliminates external memory and reduces BOM count. | Use Scenario: HVAC zone controller interfacing with thermostats, damper actuators, and CO₂ sensors via RS-485 network. IC Role / Device Role / Timing Role: Real-time coordinator using SCI2 for BACnet MS/TP communication and internal timers for precise PID loop execution (100 ms interval). Use Value: Integrated 10-bit ADC reads analog sensor outputs directly; LVD ensures fail-safe shutdown during power dips - meets UL 60730 Class A requirements for automatic controls. |
| Legacy Equipment Retrofit Kit | Factory Floor Data Logger |
Use Scenario: Drop-in replacement board for aging CNC machine tool controllers originally using HD64F36079G. IC Role / Device Role / Timing Role: Pin- and code-compatible upgrade path preserving existing PCB layout and firmware binary - leverages identical memory map and peripheral register layout. Use Value: DF36079GHV replaces obsolete HD64F36079G with same LQFP-100 footprint and identical reset timing - extends product lifecycle without redesign or requalification. | Use Scenario: Battery-powered environmental monitor logging temperature/humidity every 5 minutes to SD card via SPI interface. IC Role / Device Role / Timing Role: Low-power supervisor activating ADC and SPI only during scheduled intervals; stops CPU between samples using STOP mode. Use Value: SCI1 auto-wakeup on host poll command enables responsive remote interrogation while maintaining <15 μA average current - achieves 2-year battery life on two AA cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD64F36079G | Same H8/36079 Group silicon; mask ROM version with identical pinout, memory map, and peripheral set - predecessor part number before Renesas branding consolidation | Identical functional scope; used in pre-2010 designs - requires verification of ROM content match for firmware compatibility | Select HD64F36079G only if legacy firmware binary is certified for that specific mask version; DF36079GHV offers updated quality documentation and long-term supply assurance |
| H8/3694F | Successor H8/300H device with larger 256 KB ROM, enhanced SCI (with FIFO), and extended timer resolution - not pin-compatible; requires PCB redesign | Supports more complex protocols (e.g., CAN+Modbus dual-stack) and higher sample rates (ADC up to 1 MSPS) - suited for next-generation equipment | Choose H8/3694F for new designs needing >128 KB code space or advanced peripherals; DF36079GHV remains optimal for cost-constrained, footprint-sensitive retrofits |
Compared with HD64F36079G, DF36079GHV provides identical functionality with updated manufacturing traceability and documented compliance to current Renesas quality standards; versus H8/3694F, it trades scalability for pin compatibility and lower system cost - making DF36079GHV the definitive choice for maintaining legacy H8-based infrastructure.
Availability
DF36079GHV is available at Aetrix Electronics and suitable for industrial automation, building management systems, and legacy equipment retrofit programs requiring stable component supply and long-term obsolescence mitigation.
Supply support for DF36079GHV 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The H8 Family targets cost-sensitive, deterministic real-time applications in factory automation and legacy industrial systems - designed for reliability under electrical noise, wide temperature ranges, and long product lifecycles without feature bloat.
FAQ
What is the maximum operating frequency of the DF36079GHV?
The DF36079GHV operates at a maximum CPU frequency of 20 MHz, delivering 16 MIPS performance. This speed is achievable when using the external clock input or crystal oscillator mode; internal RC oscillator is rated at 1 MHz nominal but can be trimmed and multiplied via on-chip PLL circuitry to reach higher frequencies depending on configuration - always verify timing margins against actual VCC and temperature conditions per the Electrical Characteristics section of the hardware manual.
Does the DF36079GHV support in-circuit debugging?
Yes, the DF36079GHV supports in-circuit debugging via Renesas E7/E8 emulators using the NMI pin and dedicated debug pins (P85–P87). However, these pins are reserved during emulation and cannot be used for application I/O simultaneously - the hardware manual specifies strict restrictions on memory address usage (e.g., H'01F000–H'01FFFF reserved) and prohibits access to debug-protected regions (H'FFF780–H'FFFB7F) when emulator is connected. DF36079GHV firmware must be adapted to avoid conflicts.
What is the role of the RCTRMDR register in the DF36079GHV?
Within the DF36079GHV, the RCTRMDR (RC Trimming Data Register) allows fine-tuning of the internal RC oscillator frequency by writing a 6-bit trimming value (0x00–0x3F). This register, protected by RCTRMDPR, enables calibration to ±1% accuracy across voltage and temperature - critical for UART baud rate stability when no external crystal is used. The trimming value persists through reset but is lost on power-down unless saved externally.
Can the DF36079GHV operate from a 3.3 V supply?
No, the DF36079GHV is specified for 5.0 V ±10% operation only (4.5 V to 5.5 V). Its I/O structure, internal regulators, and flash programming voltage requirements are designed exclusively for 5 V logic levels. Attempting 3.3 V operation will result in undefined behavior, failed ADC conversions, and potential corruption of on-chip ROM contents. For 3.3 V systems, consider Renesas' later H8SX or RX families - DF36079GHV must be powered from a regulated 5 V rail.
How many serial communication interfaces does the DF36079GHV include?
The DF36079GHV integrates three independent Serial Communication Interfaces (SCI0, SCI1, SCI2), each supporting asynchronous full-duplex UART operation with programmable baud rates, parity, and stop bits. SCI1 is fixed to pins P21 (RXD) and P22 (TXD); SCI0 and SCI2 are multiplexed onto other port pins and require mode register configuration. All three SCIs support multi-processor communication mode and can generate interrupts on framing, overrun, or receive events - enabling DF36079GHV to manage multiple serial fieldbuses concurrently.
DF36079GHV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 64-BQFP
- Series:
- H8® H8/300H Tiny
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- H8/300H
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, SCI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 47
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 6K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 75°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DF36079GHV FAQ
1.How can I place an order for DF36079GHV through Aetrix?
Please submit a Request for Quotation (RFQ) for DF36079GHV 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 DF36079GHV reliable?
The price and inventory of DF36079GHV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF36079GHV is usually 5 days.
3.What payment methods are accepted for DF36079GHV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF36079GHV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF36079GHV?
DF36079GHV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF36079GHV 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 DF36079GHV?
For technical support, including DF36079GHV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF36079GHV requirements.
6.How does Aetrix verify that DF36079GHV is sourced from the original manufacturer or authorized distributors?
All DF36079GHV 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 DF36079GHV meets industry standards.
7.What is the process for return or replacement of DF36079GHV?
All DF36079GHV units undergo pre-shipment inspection (PSI). If there is an issue with DF36079GHV, 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 DF36079GHV part is unused and in its original packaging.
Return procedure for DF36079GHV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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