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Renesas UPD78F1235GB-GAH-AX
- Part No.:
- UPD78F1235GB-GAH-AX
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
UPD78F1235GB-GAH-AX.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,810
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Product details
Overview
UPD78F1235GB-GAH-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/IE3 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated peripherals including 12-bit ADC, UART, I²C, and timer modules. It operates at up to 20 MHz with supply voltage range of 2.7–5.5 V and targets embedded control in industrial and consumer equipment.
For engineers reviewing the UPD78F1235GB-GAH-AX datasheet, UPD78F1235GB-GAH-AX pinout, UPD78F1235GB-GAH-AX application, or UPD78F1235GB-GAH-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), operating temperature range (−40°C to +85°C), and compatibility with RA78K0R C compiler and QB-MINI2 debug emulator.
Technical Context
The UPD78F1235GB-GAH-AX implements the 78K0R CPU core with 16-bit architecture, supporting both 8-bit and 16-bit instructions. It integrates a 12-bit successive-approximation ADC with 16 input channels, four 16-bit timer/counters (including one real-time clock capable), and dual serial interfaces - one UART channel and one I²C-compatible interface.
Power management includes HALT and STOP modes with wake-up via external interrupt or internal timer. The device uses SuperFlash® technology for Flash memory, enabling single-cycle read access and page erase capability. Reset sources include power-on reset, low-voltage detection, and external reset pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 78K0R 16-bit CPU with 8/16-bit instruction set and 16 MB address space |
| Program Memory | 128 KB on-chip Flash (SuperFlash®), 100,000 write/erase cycles, 128-byte page size |
| Data Memory | 8 KB RAM, including 256-byte data flash for parameter storage |
| ADC Resolution | 12-bit SAR ADC with 16 selectable input channels and ±1 LSB INL |
| Max Operating Frequency | 20 MHz system clock via internal high-speed oscillator or external crystal |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade applications per Renesas Standard grade |
Pinout & Package
UPD78F1235GB-GAH-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across 16 I/O ports (P0–P15), analog inputs (AVREF/AVSS), power rails (VDD/EVDD, VSS/EVSS), and dedicated control signals (RESET, FLMD0, REGC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P07 | Port 0 bidirectional I/O | 8-bit general-purpose port with NMI input capability on P00 and clock output on P01 |
| P10–P17 | Port 1 bidirectional I/O | 8-bit port supporting UART0 TX/RX, I²C SCL/SDA, and timer capture/compare functions |
| P20–P27 | Port 2 bidirectional I/O | 8-bit port with ADC input channels AN0–AN7 and external interrupt inputs |
| P30–P33 | Port 3 bidirectional I/O | 4-bit port supporting UART1 TX/RX and additional timer outputs |
| AVREF | Analog reference voltage input | Provides precision reference for 12-bit ADC; accepts 2.7–5.5 V input |
| RESET | Active-low reset input | Asynchronous reset signal with internal pull-up; triggers full hardware initialization |
| REGC | Regulator control | Enables internal voltage regulator for stable core voltage during low-VDD operation |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Flash endurance | 100,000 write/erase cycles enables field firmware updates without external memory |
| Integrated 12-bit ADC | 16-channel simultaneous sampling support simplifies sensor interface in motor control and power monitoring |
| Dual serial interfaces | UART + I²C allows concurrent communication with host MCU and peripheral sensors (e.g., temperature, EEPROM) |
| Real-time clock timer | Dedicated 32.768 kHz RTC timer with calendar function supports time-stamped logging in data loggers |
| Low-power STOP mode | Current draw < 1 µA in STOP mode with wake-up via external interrupt or RTC alarm - extends battery life in portable devices |
Applications
| Industrial Motor Control | Smart Metering |
|---|---|
Use Scenario: Closed-loop speed and current regulation in BLDC fans and pumps using hall-effect or encoder feedback. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing PWM generation, ADC sampling, and fault protection logic. Use Value: Integrated 12-bit ADC with hardware averaging and 16-bit timers enable precise current sensing and commutation timing within 1 µs jitter. | Use Scenario: Electricity meter with tariff switching, tamper detection, and RS-485 communication to utility backend. IC Role / Device Role / Timing Role: System-on-chip performing energy calculation, LCD drive, secure data storage, and serial protocol handling. Use Value: On-chip 128 KB Flash stores metrology firmware and tariff tables; I²C interface connects to external secure EEPROM for encryption keys. |
| Home Appliance Control | Factory Automation I/O Module |
Use Scenario: Washing machine main board managing water level, motor drive, heating, and user interface. IC Role / Device Role / Timing Role: Central MCU coordinating sensor inputs (NTC, pressure switch), actuator outputs (valves, heater, motor drivers), and display. Use Value: Multiple 16-bit timers synchronize drum rotation with detergent dispensing; 8 KB RAM buffers UI state and error logs. | Use Scenario: DIN-rail mounted digital I/O module converting field signals (24 V DC) to Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol processor and isolation-aware GPIO manager interfacing with optocoupled inputs and relay drivers. Use Value: Dedicated UART with automatic half-duplex direction control reduces external transceiver count; 100-pin LQFP provides ample I/O for 16-channel digital input/output expansion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F100LEAFB#30 | RL78/G13-based; 32 KB Flash, 4 KB RAM, lower max frequency (24 MHz), no built-in RTC timer | Suitable for cost-sensitive, lower-complexity control tasks where RTC and large Flash are not required | Select when BOM cost reduction is prioritized over Flash capacity and RTC integration |
| MB95F575KPMC-GSE1 | Fujitsu FM3-based; 256 KB Flash, 32 KB RAM, higher power consumption, different peripheral register map | Better suited for applications requiring larger code footprint and more RAM, such as multi-protocol gateways | Choose only if existing design uses FM3 toolchain and requires >128 KB Flash |
Compared with R5F100LEAFB#30 and MB95F575KPMC-GSE1, the UPD78F1235GB-GAH-AX offers balanced Flash/RAM capacity, integrated RTC, and industrial temperature support - making it optimal for mid-tier embedded controllers where firmware complexity and timekeeping are essential but cost must remain constrained.
Availability
UPD78F1235GB-GAH-AX is available at Aetrix Electronics and suitable for industrial motor control, smart metering, home appliance control, and factory automation I/O modules requiring stable component supply and long-term lifecycle assurance.
Supply support for UPD78F1235GB-GAH-AX 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 78K0R/Ix3 product line - including the UPD78F1235GB-GAH-AX - was designed for cost-effective, high-reliability embedded control in industrial and consumer appliances, emphasizing Flash endurance, mixed-signal integration, and toolchain compatibility with legacy 78K development ecosystems.
FAQ
What is the maximum operating frequency of the UPD78F1235GB-GAH-AX?
The UPD78F1235GB-GAH-AX supports a maximum system clock frequency of 20 MHz, achievable using either the internal high-speed oscillator (with optional trimming) or an external crystal/resonator up to 20 MHz. This frequency enables real-time execution of control loops with sub-microsecond latency for ADC-triggered PWM updates and interrupt response.
Does the UPD78F1235GB-GAH-AX include a hardware real-time clock (RTC)?
Yes, the UPD78F1235GB-GAH-AX includes a dedicated 32.768 kHz RTC timer with calendar function (year/month/day/hour/minute/second), independent of the main CPU clock. It retains time during STOP mode when powered by backup supply, and supports alarm interrupts - critical for timestamped data logging in the UPD78F1235GB-GAH-AX.
What development tools are officially supported for the UPD78F1235GB-GAH-AX?
Renesas officially supports the RA78K0R Assembler Package, CC78K0R C Compiler Ver. 2.00, QB-MINI2 On-Chip Debug Emulator, and PG-FP5 Flash Programmer for the UPD78F1235GB-GAH-AX. These tools provide full debug visibility, Flash programming, and optimization for the 78K0R/IE3 instruction set and memory map.
Is the UPD78F1235GB-GAH-AX RoHS compliant and lead-free?
Yes, the UPD78F1235GB-GAH-AX is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU requirements. Its LQFP package uses matte tin plating, and all materials comply with Renesas' environmental policy - confirmed in the device's official part marking and packaging documentation for the UPD78F1235GB-GAH-AX.
What is the Flash memory endurance specification for the UPD78F1235GB-GAH-AX?
The UPD78F1235GB-GAH-AX features 128 KB of on-chip SuperFlash® memory rated for 100,000 write/erase cycles per block, with data retention exceeding 20 years at +85°C. This endurance supports robust field firmware updates and parameter storage in industrial applications where the UPD78F1235GB-GAH-AX serves as primary controller.
UPD78F1235GB-GAH-AX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 64-LQFP
- Series:
- 78K0R/Ix3
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 78K/0R
- Core Size:
- 16-Bit
- Speed:
- 40MHz
- Connectivity:
- 3-Wire SIO, I2C, LINbus, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 50
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 3K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD78F1235GB-GAH-AX FAQ
1.How can I place an order for UPD78F1235GB-GAH-AX through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F1235GB-GAH-AX 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 UPD78F1235GB-GAH-AX reliable?
The price and inventory of UPD78F1235GB-GAH-AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F1235GB-GAH-AX is usually 5 days.
3.What payment methods are accepted for UPD78F1235GB-GAH-AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F1235GB-GAH-AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F1235GB-GAH-AX?
UPD78F1235GB-GAH-AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F1235GB-GAH-AX 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 UPD78F1235GB-GAH-AX?
For technical support, including UPD78F1235GB-GAH-AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F1235GB-GAH-AX requirements.
6.How does Aetrix verify that UPD78F1235GB-GAH-AX is sourced from the original manufacturer or authorized distributors?
All UPD78F1235GB-GAH-AX 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 UPD78F1235GB-GAH-AX meets industry standards.
7.What is the process for return or replacement of UPD78F1235GB-GAH-AX?
All UPD78F1235GB-GAH-AX units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F1235GB-GAH-AX, 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 UPD78F1235GB-GAH-AX part is unused and in its original packaging.
Return procedure for UPD78F1235GB-GAH-AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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