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Renesas UPD78F9212FH-2A2-E1-A
- Part No.:
- UPD78F9212FH-2A2-E1-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
UPD78F9212FH-2A2-E1-A.pdf
- Description:
- IC MCU
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Product details
Overview
UPD78F9212FH-2A2-E1-A from Renesas Electronics is an 8-bit single-chip microcontroller based on the 78K0S/KY1+ CPU core, featuring 4 KB Flash memory, 128 bytes high-speed RAM, 10-bit 4-channel A/D converter, 16-bit and 8-bit timers, watchdog timer, and 14 I/O pins-including 13 CMOS I/O and 1 CMOS input-in a 16-pin WLCSP package. It operates from 2.0 V to 5.5 V and supports household appliances and mobile device control.
For engineers reviewing the UPD78F9212FH-2A2-E1-A datasheet, UPD78F9212FH-2A2-E1-A pinout, UPD78F9212FH-2A2-E1-A application, or UPD78F9212FH-2A2-E1-A equivalent, key selection considerations include Flash size (4 KB), WLCSP package dimensions (1.93 × 2.24 × 0.4 mm, 0.5 mm pitch), A/D input voltage range (2.7–5.5 V), minimum instruction time (0.2 µs @ 10 MHz), and RESET pin configurability via option byte.
Technical Context
This microcontroller implements the 78K/0S CISC architecture with fixed 8-bit data path and 16-bit address space, supporting up to 64 KB memory addressing. Its clock system integrates three independent sources: high-speed internal oscillator (8 MHz typ.), crystal/ceramic oscillator (1–10 MHz), and low-speed internal oscillator (240 kHz typ.) for WDT and STOP-mode timing.
The peripheral subsystem includes a 10-bit SAR A/D converter with dedicated analog inputs ANI0–ANI3 mapped to P20–P23, a 16-bit timer/event counter with capture/compare capability (TI000/TI010 inputs, TO00 output), and an 8-bit timer H1 with PWM-capable TOH1 output. All I/O ports support software-configurable pull-up resistors and individual direction control per bit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 78K0S/KY1+ 8-bit CISC CPU with 16-bit address bus and 64 KB memory space |
| Flash Memory | 4 KB on-chip self-programmable Flash, organized in 16 blocks of 256 bytes each for flexible erase granularity |
| Data RAM | 128 bytes high-speed on-chip RAM, directly accessible without wait states |
| A/D Converter | 10-bit resolution, 4-channel SAR ADC with input range 2.7–5.5 V; uses VDD as reference and VSS as analog ground |
| Timers | One 16-bit timer/event counter (TM00) with capture/compare and external clock input; one 8-bit timer (TMH1) with PWM output (TOH1) |
| Operating Voltage | 2.0 V to 5.5 V supply range; power-on clear (POC) triggers at 2.1 V ±0.1 V, requiring 2.2–5.5 V for reliable A/D operation |
| Package | 16-pin Wafer-Level Chip Scale Package (WLCSP), 1.93 × 2.24 × 0.4 mm, 0.5 mm pitch, lead-free (-E1-A suffix) |
Pinout & Package
Package: 16-pin WLCSP (1.93 × 2.24 × 0.4 mm, 0.5 mm pitch), bottom-side ball layout with index mark. Requires controlled reflow profile due to fine-pitch solder balls and thin profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1: P20/ANI0/TI000/TOH1 | Multi-function port pin | Primary: 8-bit port 2 bit 0; alternate: analog input 0, timer input 000, or 8-bit timer H1 output - function selected via option byte and SFR settings |
| A2: VSS | Analog/digital ground | Common ground reference for digital logic and A/D converter; must be connected to stable 0 V plane |
| A3: P47 | General-purpose I/O | Bit 7 of 8-bit port 4; configurable as input/output with software-controlled pull-up resistor |
| A4: P23/X1/ANI3 | System clock or analog input | Crystal input (X1) when oscillator selected; otherwise usable as port 2 bit 3 or analog input 3 - mutually exclusive per option byte setting |
| B1: P41 | General-purpose I/O | Bit 1 of port 4; supports interrupt-on-change when configured as input |
| B2: P40 | General-purpose I/O | Bit 0 of port 4; default input after reset; pull-up enabled via P4PU register |
| B3: VDD | Power supply | Positive supply (2.0–5.5 V); serves as A/D reference voltage when A/D is active - requires local decoupling |
| B4: P46 | General-purpose I/O | Bit 6 of port 4; supports external interrupt INTP1 when remapped via option byte |
| C1: P42 | General-purpose I/O | Bit 2 of port 4; no alternate functions; fully software-controllable |
| C2: P43 | General-purpose I/O | Bit 3 of port 4; supports open-drain output mode in certain configurations |
| C3: P34/RESET | Reset control or port input | Hardware reset input by default; configurable as port 3 bit 4 input only if RMCE = 0 in option byte - requires external pull-up |
| C4: P45 | General-purpose I/O | Bit 5 of port 4; no shared peripherals; suitable for LED drive or sensor interface |
| D1: P21/ANI1/TI010/TO00/INTP0 | Multi-function port pin | Port 2 bit 1, analog input 1, timer input 010, 16-bit timer output, or external interrupt 0 - function determined by SFR and option byte |
| D2: P32/INTP1 | External interrupt input | Port 3 bit 2; dedicated external interrupt source (INTP1); edge-triggered (rising/falling/both) via I/O control register |
| D3: P44 | General-purpose I/O | Bit 4 of port 4; supports wake-up-from-STOP functionality when configured as input |
| D4: P22/X2/ANI2 | System clock or analog input | Crystal input (X2) when oscillator selected; otherwise port 2 bit 2 or analog input 2 - usage constrained by OSCSEL bits in option byte |
Key Features
| Feature | Design Value |
|---|---|
| Single-voltage Flash programming | Enables in-system reprogramming at standard VDD (2.0–5.5 V) without HV supply - simplifies field updates and reduces BOM count |
| Configurable system clock source | Option byte selects between internal 8 MHz oscillator, external crystal (1–10 MHz), or external clock - eliminates need for external crystal in cost-sensitive designs |
| Dedicated A/D reference coupling | VDD and VSS serve as A/D reference and analog ground - avoids external reference IC but requires clean, stable supply rails |
| Flexible RESET pin usage | RMCE bit in option byte allows P34 to operate as general-purpose input instead of RESET - recovers one I/O pin when hardware reset is unnecessary |
| STOP-mode timer retention | 8-bit timer H1 continues operating using low-speed internal oscillator during STOP mode - enables low-power periodic wake-up without full CPU restart |
Applications
| Toys & Remote-Controlled Devices | Smart Home Sensors |
|---|---|
Use Scenario: Low-cost motion-activated toy with button inputs, LED feedback, and battery monitoring. IC Role / Device Role / Timing Role: Main controller executing state machine logic, reading pushbuttons and analog battery voltage, driving LEDs, and managing sleep/wake cycles. Use Value: 4 KB Flash accommodates firmware with sensor calibration and RF protocol stack; 10-bit A/D measures battery level with ±0.5% accuracy over 2.7–5.5 V range. | Use Scenario: Compact temperature/humidity sensor node powered by coin cell, transmitting data via sub-GHz RF. IC Role / Device Role / Timing Role: Sensor interface MCU acquiring analog readings, performing basic compensation, and triggering RF transmission on threshold breach. Use Value: WLCSP package enables <20 mm² PCB footprint; STOP-mode timer with low-speed oscillator achieves 1 µA typical standby current while maintaining 1-second wake interval. |
| Portable Audio Accessories | Small-Appliance Control Panels |
Use Scenario: USB-powered headphone amplifier with volume control, bass boost toggle, and LED status indicators. IC Role / Device Role / Timing Role: Peripheral manager handling rotary encoder input, button debouncing, LED PWM dimming, and I²C communication to audio codec. Use Value: 14 I/O pins support encoder (2 pins), buttons (3), LEDs (3), and I²C (2) with spares; 0.2 µs min instruction time ensures responsive UI updates. | Use Scenario: Touchless induction cooktop with capacitive touch keys, thermal cutoff monitoring, and fan speed control. IC Role / Device Role / Timing Role: System supervisor reading thermistors, driving triac gate drivers, managing cooling fan PWM, and detecting user gestures. Use Value: 4-channel A/D simultaneously samples two thermistors and two voltage monitors; 16-bit timer provides precise 20 kHz fan PWM carrier frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F100PLAFB#30 | RL78/G13 core, 8 KB Flash, 1.25 KB RAM, 15 I/O, 8-channel 10-bit A/D; operates down to 1.6 V | Higher memory and I/O count; supports lower voltage operation and more complex sensor fusion | Select when firmware exceeds 4 KB or additional A/D channels/I/O are required; not pin-compatible |
| STM8L052C6T6 | STM8 core, 32 KB Flash, 2 KB RAM, 21 I/O, 16-channel 12-bit A/D; ultra-low-power STOP mode (350 nA) | Superior low-power performance and resolution; larger memory for OTA updates and logging | Choose for battery life-critical applications where WLCSP size is secondary to energy efficiency |
Compared with R5F100PLAFB#30 and STM8L052C6T6, UPD78F9212FH-2A2-E1-A offers minimal footprint and proven integration for cost-sensitive consumer devices, trading memory headroom and ultra-low-power modes for compactness and established toolchain support in legacy 78K ecosystems.
Availability
UPD78F9212FH-2A2-E1-A is available at Aetrix Electronics and suitable for household appliance control, toy electronics, and portable sensor node development requiring stable component supply and long-term industrial availability.
Supply support for UPD78F9212FH-2A2-E1-A 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 78K/0S series, including UPD78F9212FH-2A2-E1-A, was designed for cost-sensitive, space-constrained embedded control in consumer electronics - emphasizing small footprint, single-supply Flash programmability, and integrated analog peripherals.
FAQ
What is the maximum system clock frequency supported by UPD78F9212FH-2A2-E1-A?
UPD78F9212FH-2A2-E1-A supports a maximum system clock frequency of 10 MHz when using crystal/ceramic oscillation or external clock input. The high-speed internal oscillator operates at 8 MHz (typical). At 10 MHz, the minimum instruction execution time is 0.2 µs, enabling responsive real-time control in applications such as motor commutation or sensor sampling.
Can UPD78F9212FH-2A2-E1-A operate from a 3.3 V supply while using its A/D converter?
Yes, UPD78F9212FH-2A2-E1-A operates from 2.0 V to 5.5 V, and its 10-bit A/D converter functions correctly at 3.3 V. Since VDD serves as the A/D reference, the input voltage range becomes 0–3.3 V. For optimal accuracy, ensure VDD is stable and well-decoupled, and connect VSS to a clean analog ground plane as specified in the pin function documentation.
How is the RESET pin configured on UPD78F9212FH-2A2-E1-A?
The RESET pin (P34) on UPD78F9212FH-2A2-E1-A is configurable via the RMCE bit in the option byte at address 0080H. When RMCE = 1 (default), P34 functions as hardware reset input and requires no external pull-up. When RMCE = 0, P34 becomes a general-purpose input port (P34), but an external pull-up resistor is mandatory to prevent floating input states.
Does UPD78F9212FH-2A2-E1-A support in-system programming of its Flash memory?
Yes, UPD78F9212FH-2A2-E1-A supports single-voltage in-system programming (ISP) of its 4 KB Flash memory using only the standard VDD supply (2.0–5.5 V). No external high-voltage programmer is required. Programming is performed via the on-chip boot ROM using UART or dedicated debug interface, enabling field firmware updates without removing the device from the PCB.
What are the valid operating ambient temperature ranges for UPD78F9212FH-2A2-E1-A?
UPD78F9212FH-2A2-E1-A is rated for operation across an ambient temperature range of −40°C to +85°C. This range aligns with the "Standard" quality grade defined by Renesas, making it suitable for consumer and industrial equipment such as home appliances, toys, and portable electronic devices deployed in non-extreme environments.
UPD78F9212FH-2A2-E1-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
UPD78F9212FH-2A2-E1-A FAQ
1.How can I place an order for UPD78F9212FH-2A2-E1-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F9212FH-2A2-E1-A 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 UPD78F9212FH-2A2-E1-A reliable?
The price and inventory of UPD78F9212FH-2A2-E1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F9212FH-2A2-E1-A is usually 5 days.
3.What payment methods are accepted for UPD78F9212FH-2A2-E1-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F9212FH-2A2-E1-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F9212FH-2A2-E1-A?
UPD78F9212FH-2A2-E1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F9212FH-2A2-E1-A 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 UPD78F9212FH-2A2-E1-A?
For technical support, including UPD78F9212FH-2A2-E1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F9212FH-2A2-E1-A requirements.
6.How does Aetrix verify that UPD78F9212FH-2A2-E1-A is sourced from the original manufacturer or authorized distributors?
All UPD78F9212FH-2A2-E1-A 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 UPD78F9212FH-2A2-E1-A meets industry standards.
7.What is the process for return or replacement of UPD78F9212FH-2A2-E1-A?
All UPD78F9212FH-2A2-E1-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F9212FH-2A2-E1-A, 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 UPD78F9212FH-2A2-E1-A part is unused and in its original packaging.
Return procedure for UPD78F9212FH-2A2-E1-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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