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Renesas M3823AGFFP#U0
- Part No.:
- M3823AGFFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-BQFP
- Datasheet:
-
M3823AGFFP#U0.pdf
- Description:
- IC MCU 8BIT 60KB QZROM 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
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Product details
Overview
M3823AGFFP#U0 from Renesas Electronics is an 8-bit CMOS microcomputer based on the 740 family core, featuring integrated LCD drive control (up to 32 segments, 4 commons), 8-channel 10-bit A/D converter, UART/clock-synchronized serial interface, three 8-bit and two 16-bit timers, watchdog timer, and ROM correction function. It operates from 1.8 V to 5.5 V across multiple clock modes and targets low-power consumer display applications such as digital thermostats and portable audio interfaces.
For engineers reviewing the M3823AGFFP#U0 datasheet, M3823AGFFP#U0 pinout, M3823AGFFP#U0 application, or M3823AGFFP#U0 equivalent, key selection criteria include its 80-pin QFP package, 60 KB QzROM/2560-byte RAM configuration, dual-clock system (main XIN/XOUT + sub-XCIN/XCOUT), and hardware key-on-wake-up interrupt support for battery-powered UI systems.
Technical Context
The M3823AGFFP#U0 implements the standard 740-family instruction set with 71 base instructions and a minimum instruction execution time of 0.4 µs at 10 MHz in high-speed mode. Its CPU includes accumulator, index registers X/Y, stack pointer, and 16-bit program counter with stack page selection.
It integrates a dedicated LCD driver supporting 1/2, 1/3, or 1/4 bias and 2–4 duty ratios, alongside dual clock domains: main oscillator (ceramic resonator or quartz crystal) with built-in feedback resistor, and sub-clock oscillator (quartz crystal or on-chip oscillator) enabling ultra-low-power standby operation down to 18 µW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 740-family 8-bit CPU with 71 instructions and 0.4 µs min instruction cycle at 10 MHz |
| Memory | 60 KB QzROM (61440 bytes), 2560-byte RAM including LCD display RAM and ROM correction buffers |
| A/D Converter | 10-bit resolution × 8 channels, with external trigger input (ADT pin) and reference voltage (VREF) |
| LCD Driver | Supports 32 segment outputs and 4 common outputs; configurable for 1/2 or 1/3 bias, 2/3/4 duty |
| Operating Voltage | 1.8 V to 5.5 V across multiple clock division modes (frequency/4, /8, low-speed) |
| Power Dissipation | 18 mW typical at 8 MHz/5 V; 18 µW at 32 kHz sub-clock only; 35 µW with on-chip oscillator active |
| Package | 80-pin plastic-molded QFP (PRQP0080GB-A, 0.8 mm pitch) |
| Temperature Range | –20 °C to +85 °C, rated for Standard-grade applications per Renesas classification |
Pinout & Package
Package: 80-pin plastic-molded QFP (PRQP0080GB-A, 0.8 mm pitch), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply inputs | Primary digital power (VCC) and ground (VSS); must be decoupled per layout guidelines for noise immunity |
| XIN / XOUT | Main clock oscillator interface | Connect external ceramic resonator or quartz crystal; internal feedback resistor enables self-oscillation |
| XCIN / XCOUT | Sub-clock oscillator interface | Supports 32 kHz quartz crystal for real-time clock or ultra-low-power wake-up; no external clock input allowed |
| P20–P27/KW0–KW7 | Key input interrupt pins | Dedicated hardware key-on-wake-up inputs with pull-down control; enable fast wake from sleep without CPU polling |
| SEG0–SEG11, P00–P17, COM0–COM3 | LCD segment/common drivers | Direct-drive capability for static or multiplexed LCDs up to 128 segments (via shared pin functions) |
| P60–P67/AN0–AN7 | Analog input channels | Eight dedicated A/D input pins with internal sample-and-hold; require AVSS and VREF decoupling |
| P44/RXD, P45/TXD | UART serial interface | Full-duplex asynchronous communication; supports baud rate generation via internal timers |
| RESET | Active-low reset input | Asynchronous reset signal; requires external pull-up and debouncing for reliable power-on initialization |
Key Features
| Feature | Design Value |
|---|---|
| ROM Correction Function | Two 32-byte blocks allow field correction of QzROM contents without device replacement |
| Low-Power Operation Modes | Three clock division modes (frequency/4, /8, low-speed) plus sub-clock-only mode enable <20 µW standby |
| Hardware Key Interrupt | Eight dedicated KW0–KW7 pins with automatic wake-up and vectorized ISR entry reduce firmware overhead |
| Integrated LCD Controller | Configurable bias/duty settings and segment/common drive eliminate need for external LCD driver IC |
| Dual Clock Domains | Independent main and sub-clock systems permit simultaneous high-speed processing and low-power RTC operation |
| Real-Time Port (RTP) | RTP0/RTP1 pins support external real-time clock synchronization or event capture with timer correlation |
Applications
| Smart Thermostat Display | Digital Audio Remote Control |
|---|---|
Use Scenario: Battery-powered wall-mounted thermostat with segmented LCD showing temperature, mode, and schedule. IC Role / Device Role / Timing Role: Primary MCU managing sensor reads, UI rendering, button scan, and low-power sleep/wake cycles. Use Value: Integrated LCD driver and key-wake interrupts eliminate external components; 1.8 V operation extends coin-cell life beyond 2 years. | Use Scenario: Compact IR remote with backlit LCD and volume/bass/treble controls. IC Role / Device Role / Timing Role: System controller handling IR decode, LCD update, and analog potentiometer A/D sampling. Use Value: 8-channel 10-bit A/D enables precise analog knob calibration; UART supports firmware updates via host device. |
| Portable Medical Monitor | Home Appliance Control Panel |
Use Scenario: Handheld pulse oximeter with OLED-compatible LCD and LED driver timing control. IC Role / Device Role / Timing Role: Real-time data acquisition MCU coordinating A/D conversion, display refresh, and LED pulsing via timer outputs. Use Value: TOUT pin provides accurate LED strobe timing; sub-clock domain maintains RTC during deep sleep between measurements. | Use Scenario: Microwave oven control panel with touch-sensitive keys and multi-segment display. IC Role / Device Role / Timing Role: Main UI processor executing key scan, display update, buzzer tone generation, and safety interlock monitoring. Use Value: Hardware key-wake reduces response latency to <10 ms; programmable pull-up/pull-down simplifies PCB design for varying switch types. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M38239GCFP | 49 KB ROM, 2048-byte RAM, same 80-pin QFP package and peripheral set | Lower memory capacity suits simpler UIs with fewer display states or smaller firmware footprints | Select when firmware size is <45 KB and cost sensitivity outweighs future scalability needs |
| M38235G6FP | 24 KB ROM, 768-byte RAM, identical package and peripheral architecture | Targeted at cost-constrained appliances with basic LCD and minimal I/O requirements | Choose for legacy replacement or designs where full 60 KB ROM is unnecessary |
Compared with M38239GCFP and M38235G6FP, the M3823AGFFP#U0 offers the largest on-chip memory (60 KB ROM/2560-byte RAM) within the 3823 family's 80-pin QFP footprint, enabling complex UI logic, larger font sets, and future firmware updates without hardware revision.
Availability
M3823AGFFP#U0 is available at Aetrix Electronics and suitable for smart thermostat displays, digital audio remotes, portable medical monitors, and home appliance control panels requiring stable component supply and long-term industrial availability.
Supply support for M3823AGFFP#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The 3823 group was designed specifically for cost-sensitive, low-power consumer electronics with integrated LCD and A/D functionality-targeting applications where display-driven user interaction and analog sensing coexist on a single chip.
FAQ
What is the maximum operating frequency of the M3823AGFFP#U0?
The M3823AGFFP#U0 supports a maximum oscillation frequency of 10 MHz on its main clock (XIN/XOUT). In high-speed mode, this yields a minimum instruction execution time of 0.4 µs. The sub-clock domain operates up to 32 kHz for low-power timing functions. Frequency scaling is managed via internal clock dividers supporting frequency/2, /4, /8, and low-speed modes.
Does the M3823AGFFP#U0 support external crystal oscillators on both main and sub-clock inputs?
Yes, the M3823AGFFP#U0 supports external quartz-crystal oscillators on both XIN/XOUT (main clock) and XCIN/XCOUT (sub-clock) pins. The main clock circuit includes a built-in feedback resistor, allowing direct connection of a crystal without external components. The sub-clock input also accepts quartz crystals but does not support external clock sources-only crystal or on-chip oscillator operation is permitted.
How many LCD segments can the M3823AGFFP#U0 drive, and what bias/duty configurations are supported?
The M3823AGFFP#U0 drives up to 32 segment outputs and 4 common outputs, enabling up to 128 distinct LCD segments (32 × 4). It supports 1/2 or 1/3 bias and 2-, 3-, or 4-line duty configurations. COM2 and COM3 are disabled in 1/2-duty mode; COM3 is inactive in 1/3-duty mode-configurations are selected via dedicated control registers.
What is the purpose of the ROM correction function in the M3823AGFFP#U0?
The M3823AGFFP#U0 includes a ROM correction function consisting of two independent 32-byte blocks. This allows field-level patching of QzROM content-such as bug fixes or calibration updates-without replacing the MCU. Corrections are applied transparently during code fetch, preserving full 60 KB of usable program space while enabling post-deployment firmware reliability improvements.
Can the M3823AGFFP#U0 operate from a 1.8 V supply, and under what conditions?
Yes, the M3823AGFFP#U0 operates from 1.8 V to 5.5 V. At 1.8 V, it requires the frequency/4 or frequency/8 mode with maximum XIN frequency ≤ 5 MHz, or low-speed mode with stopped main clock. This enables ultra-low-power operation-for example, 18 µW typical current draw at 32 kHz sub-clock only and 2.5 V supply-making it suitable for coin-cell-powered devices.
M3823AGFFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-BQFP
- Series:
- 740/38000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 740
- Core Size:
- 8-Bit
- Speed:
- 10MHz
- Connectivity:
- SIO, UART/USART
- Peripherals:
- LCD, WDT
- Number of I/O:
- 49
- Program Memory Size:
- 60KB (60K x 8)
- Program Memory Type:
- QzROM
- EEPROM Size:
- -
- RAM Size:
- 2.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x8b, 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
M3823AGFFP#U0 FAQ
1.How can I place an order for M3823AGFFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M3823AGFFP#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 M3823AGFFP#U0 reliable?
The price and inventory of M3823AGFFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M3823AGFFP#U0 is usually 5 days.
3.What payment methods are accepted for M3823AGFFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M3823AGFFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M3823AGFFP#U0?
M3823AGFFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M3823AGFFP#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 M3823AGFFP#U0?
For technical support, including M3823AGFFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M3823AGFFP#U0 requirements.
6.How does Aetrix verify that M3823AGFFP#U0 is sourced from the original manufacturer or authorized distributors?
All M3823AGFFP#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 M3823AGFFP#U0 meets industry standards.
7.What is the process for return or replacement of M3823AGFFP#U0?
All M3823AGFFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M3823AGFFP#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 M3823AGFFP#U0 part is unused and in its original packaging.
Return procedure for M3823AGFFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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