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Renesas M3826AEFFP#U0
- Part No.:
- M3826AEFFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M3826AEFFP#U0.pdf
- Description:
- 8-BIT, OTPROM, MELPS740 CPU
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Inventory:471
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Product details
Overview
M3826AEFFP#U0 from Renesas Electronics is an 8-bit CMOS microcomputer based on the 740 family core, featuring integrated LCD drive control (40-segment/4-common), 8-channel 10-bit A/D converter, dual 8-bit D/A converters (for DTMF/CTCSS), UART and clock-synchronous serial interfaces, PWM output, and watchdog timer - deployed in consumer camera and appliance control systems.
For engineers reviewing the M3826AEFFP#U0 datasheet, M3826AEFFP#U0 pinout, M3826AEFFP#U0 application, or M3826AEFFP#U0 equivalent, key selection considerations include its 100-pin PRQP0100JB-A QFP package, 48 KB mask ROM / 1536-byte RAM configuration, 1.8–5.5 V wide operating voltage range, and support for both main (XIN/XOUT) and sub-clock (XCIN/XCOUT) oscillation sources.
Technical Context
The M3826AEFFP#U0 implements a 740-family CPU with 71 machine-language instructions, 0.4 µs minimum instruction cycle at 10 MHz, and six dedicated registers (A, X, Y, S, PC, PS). It integrates two independent clock generating circuits - one for high-speed main operation (ceramic resonator or quartz crystal on XIN/XOUT), another for low-power sub-clock mode (32 kHz oscillator on XCIN/XCOUT).
Its peripheral set includes three 8-bit timers, two 16-bit timers, serial I/O1 (UART or clock-synchronous), serial I/O2 (clock-synchronous only), 8-bit PWM, and an LCD controller supporting 1/2, 1/3, or 1/4 duty and 1/2 or 1/3 bias - all managed via dedicated SFRs in the zero-page memory map and controlled through programmable I/O ports (55 total, including 40 segment outputs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 740-family 8-bit architecture with 71 instructions and 0.4 µs min. execution time at 10 MHz |
| Memory | 48 KB mask ROM (user area: 49022 bytes), 1536-byte RAM - supports firmware storage and real-time data buffering |
| Operating Voltage | 1.8 V to 5.5 V across all speed modes - enables single-supply operation in battery- and line-powered appliances |
| A/D Converter | 10-bit resolution × 8 channels - provides precision analog sensing for user interface, temperature, or sensor inputs |
| LCD Driver | 40 segment / 4 common outputs, 1/2–1/4 duty, 1/2–1/3 bias - directly drives multiplexed character or segment displays without external drivers |
| Power Dissipation | Typ. 28 mW at 10 MHz / 5 V (high-speed); typ. 27 µW at stop mode / 32 kHz sub-clock / 3 V (ultra-low-power standby) |
| Package | PRQP0100JB-A: 100-pin, 0.65 mm pitch plastic QFP - compatible with standard surface-mount assembly and thermal management |
Pinout & Package
Package: PRQP0100JB-A - 100-pin plastic quad flat pack (0.65 mm lead pitch), RoHS-compliant, rated for –20°C to +85°C industrial operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / ground | Primary digital power domain (4.5–5.5 V high-speed; 1.8–5.5 V low/middle-speed); requires local decoupling |
| XIN / XOUT | Main clock oscillator interface | Connects to external ceramic resonator or quartz crystal (1–10 MHz); internal feedback resistor enabled |
| XCIN / XCOUT | Sub-clock oscillator interface | Dedicated 32 kHz oscillator input/output - enables RTC and ultra-low-power wake-up without main clock running |
| SEG0–SEG17, P00–P15, P30–P37 | LCD segment outputs | 56 total segment drive pins (including dedicated SEGn and port-mapped pins) - supports up to 40 active segments in multiplexed display |
| COM0–COM3 | LCD common outputs | 4 common lines configurable for 1/2, 1/3, or 1/4 duty ratio - determines maximum display size and contrast control |
| P44/RXD, P45/TXD | UART serial interface | Full-duplex asynchronous communication channel - used for host diagnostics, firmware updates, or peripheral bridging |
| P50/PWM0, P51/PWM1 | PWM output terminals | Two independent 8-bit PWM generators - suitable for LED dimming, motor speed control, or audio tone generation |
| P60–P67 / AN0–AN7 | Analog input channels | Eight dedicated A/D input pins with selectable reference (VREF or VCC) - supports simultaneous sampling in burst mode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD controller | Drives 40×4 multiplexed displays directly - eliminates external driver IC and reduces BOM cost and board space |
| Dual D/A converters | Two independent 8-bit DACs (DA1/DA2) configured for DTMF tone generation and CTCSS signaling - enables voice-band communication functions |
| Multi-speed clock system | Independent main (XIN/XOUT) and sub-clock (XCIN/XCOUT) domains - allows dynamic power scaling between active processing and low-power monitoring |
| Programmable I/O with pull-ups | 55 total I/O pins (including 40 LCD segments), all with software-controllable pull-up resistors - simplifies button interface and bus termination |
| Wide-voltage operation | Functions across 1.8–5.5 V supply range - supports direct Li-ion battery (3.0–4.2 V), alkaline (2×AA), or regulated 3.3/5.0 V rails without level-shifting |
Applications
| Camera Control Unit | Home Appliance UI Panel |
|---|---|
Use Scenario: Embedded controller managing lens focus, flash timing, and LCD status display in compact digital cameras. IC Role / Device Role / Timing Role: Primary MCU executing real-time image capture sequencing, driving 40-segment LCD for exposure settings, and generating PWM for LED focus assist. Use Value: Single-chip integration of A/D (battery voltage, temperature), D/A (audio feedback), and LCD eliminates 3–4 discrete components and reduces PCB area by >35%. |
Use Scenario: Front-panel controller in microwave ovens or washing machines handling keypad scan, LED segment display, and motor timing. IC Role / Device Role / Timing Role: System-on-chip managing key wake-up interrupts (INT0–INT2), 8-channel A/D for door sensor and thermistor inputs, and 16-bit timers for precise cooking cycle control. Use Value: Sub-clock domain (XCIN/XCOUT) enables <27 µW standby current - extends battery backup life to >1 year in power-fail scenarios. |
| Consumer Audio Remote | Portable Medical Monitor |
Use Scenario: IR remote with LCD status feedback and DTMF-based audio confirmation tones for hearing-impaired users. IC Role / Device Role / Timing Role: Dual-D/A (DA1/DA2) generates standardized DTMF frequencies; LCD controller drives 4-digit segment display; UART handles firmware updates. Use Value: On-chip DTMF generation avoids external tone generator IC and ensures ±0.5% frequency accuracy per ITU-T Q.23 spec. |
Use Scenario: Battery-powered pulse oximeter displaying SpO₂ and heart rate on segmented LCD while logging sensor data. IC Role / Device Role / Timing Role: A/D converter samples photodiode signals at 1 kSPS; watchdog timer (14-bit) ensures fail-safe reset during signal processing; low-voltage detection triggers alert before shutdown. Use Value: 1.8 V minimum operating voltage allows direct use of single-cell LiFePO₄ (2.5–3.6 V), extending runtime by 22% vs. 3.3 V-only MCUs. |
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, 32 KB flash, 2.5–5.5 V, no integrated LCD driver or D/A converters | Requires external LCD driver and DAC ICs; better suited for flash-based field-upgradable designs | Select when firmware flexibility and long-term program retention outweigh integrated analog/LCD benefits |
| HD64F3687FPV | H8/300H core, 64 KB ROM, 4 KB RAM, 5 V only, no sub-clock domain or low-power modes below 100 µW | Lacks ultra-low-power standby; incompatible with 1.8–3.3 V battery systems | Select only for legacy 5 V industrial control where code compatibility with H8 toolchain is mandatory |
Compared with R5F100PLAFB#30 and HD64F3687FPV, the M3826AEFFP#U0 delivers unique value in cost-sensitive, LCD-integrated consumer devices through its on-die segment driver, dual D/A, and sub-clock-enabled µW-level standby - eliminating four external components and reducing total solution power by 40% in always-on display applications.
Availability
M3826AEFFP#U0 is available at Aetrix Electronics and suitable for camera modules, home appliance control panels, portable audio remotes, and battery-powered medical monitors requiring stable component supply across multi-year production cycles.
Supply support for M3826AEFFP#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 formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial, automotive, and consumer markets.
The M3826AEFFP#U0 belongs to the 3826 Group (A version) - a legacy 8-bit MCU family designed specifically for cost-optimized, LCD-driven consumer electronics with integrated analog peripherals and multi-voltage operation.
FAQ
What is the maximum operating frequency and corresponding voltage range for the M3826AEFFP#U0?
The M3826AEFFP#U0 achieves a maximum 10 MHz oscillation frequency in high-speed mode, requiring 4.5–5.5 V supply. At 8 MHz, it operates down to 4.0 V; at 6 MHz (middle-speed), the range extends to 1.8–5.5 V. This graded voltage-frequency relationship enables flexible power optimization across diverse consumer power architectures. The M3826AEFFP#U0 maintains full functionality across all supported modes without firmware changes.
Does the M3826AEFFP#U0 support true hardware UART or only clock-synchronous serial communication?
The M3826AEFFP#U0 supports true hardware UART on Serial I/O1 (pins P44/RXD and P45/TXD), configurable for asynchronous operation with programmable baud rates. Serial I/O2 (P60–P63) is clock-synchronous only. UART capability is confirmed in the functional block diagram and pin description tables of the REJ03B0028-0200 datasheet. The M3826AEFFP#U0 does not require bit-banging for standard RS-232 or TTL-level serial protocols.
How many LCD segments can the M3826AEFFP#U0 drive, and what bias/duty configurations are supported?
The M3826AEFFP#U0 drives up to 40 segments with 4 commons (COM0–COM3), supporting 1/2, 1/3, or 1/4 duty ratios and 1/2 or 1/3 bias. Segment outputs include dedicated SEG0–SEG17 plus port-mapped pins (P00–P15, P30–P37) totaling 56 physical pins - 40 of which are actively used in standard 40×4 configurations. The M3826AEFFP#U0's LCD controller requires no external charge pumps or bias resistors.
What are the exact ROM and RAM sizes for the M3826AEFFP#U0 according to its part number decoding?
Per the part numbering scheme in Figure 4 of REJ03B0028-0200, "M3826AEFFP" decodes to: 'E' = 49152 bytes (48 KB) ROM, 'F' = 1536 bytes RAM. The first 128 bytes and last 2 bytes of ROM are reserved, leaving 49022 bytes for user code. The M3826AEFFP#U0 thus provides 48 KB mask ROM and 1536-byte RAM - fixed at manufacture and optimized for cost-sensitive, high-volume consumer applications.
Is the M3826AEFFP#U0 pin-compatible with other members of the 3826 Group (A version) in the same package?
Yes - all 3826 Group (A version) devices in the PRQP0100JB-A package (e.g., M3826AMFA-XXXFP, M38268MCA-XXXFP) share identical pinouts and electrical characteristics per the Pin Configuration (Fig. 1) and Pin Description (Tables 1–2) in REJ03B0028-0200. The M3826AEFFP#U0 is functionally backward-compatible within this package family, enabling memory-size migration without PCB redesign.
M3826AEFFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
M3826AEFFP#U0 FAQ
1.How can I place an order for M3826AEFFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M3826AEFFP#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 M3826AEFFP#U0 reliable?
The price and inventory of M3826AEFFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M3826AEFFP#U0 is usually 5 days.
3.What payment methods are accepted for M3826AEFFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M3826AEFFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M3826AEFFP#U0?
M3826AEFFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M3826AEFFP#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 M3826AEFFP#U0?
For technical support, including M3826AEFFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M3826AEFFP#U0 requirements.
6.How does Aetrix verify that M3826AEFFP#U0 is sourced from the original manufacturer or authorized distributors?
All M3826AEFFP#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 M3826AEFFP#U0 meets industry standards.
7.What is the process for return or replacement of M3826AEFFP#U0?
All M3826AEFFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M3826AEFFP#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 M3826AEFFP#U0 part is unused and in its original packaging.
Return procedure for M3826AEFFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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