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Renesas M38238G8FP#U0
- Part No.:
- M38238G8FP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-BQFP
- Datasheet:
-
M38238G8FP#U0.pdf
- Description:
- IC MCU 8BIT 32KB QZROM 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,059
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Product details
Overview
M38238G8FP#U0 from Renesas Electronics is an 8-bit CMOS microcomputer based on the 740 family core, featuring integrated LCD drive control (1/2 or 1/3 bias, 4 commons, 32 segments), 10-bit 8-channel A/D converter, UART/clock-synchronized serial interface, and 8-bit × 3 / 16-bit × 2 timers. It operates from 1.8 V to 5.5 V across multiple clock modes and targets embedded consumer applications with display and sensing requirements.
For engineers reviewing the M38238G8FP#U0 datasheet, M38238G8FP#U0 pinout, M38238G8FP#U0 application, or M38238G8FP#U0 equivalent, key selection criteria include its 80-pin QFP package, QzROM-based 32 KB ROM + 1536-byte RAM configuration, low-power operation down to 18 µW in XCIN mode, and dedicated key-on wake-up interrupt support for battery-powered UI systems.
Technical Context
The M38238G8FP#U0 implements the standard 740-family instruction set (71 instructions) with a minimum instruction execution time of 0.4 µs at 10 MHz in high-speed mode. Its CPU includes accumulator, X/Y index registers, 8-bit stack pointer, and 16-bit program counter with stack page selection.
It integrates dual clock systems: main clock via external ceramic resonator or quartz crystal (XIN/XOUT with built-in feedback resistor), and sub-clock via external quartz or on-chip oscillator (XCIN/XCOUT). The LCD controller supports 1/2, 1/3, or 1/4 duty and 1/2 or 1/3 bias, with VL1–VL3 voltage inputs and COM0–COM3 outputs.
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 | 32 KB QzROM (user space: 32638 bytes) + 1536-byte RAM including LCD display RAM |
| A/D Converter | 10-bit resolution, 8 input channels (AN0–AN7), programmable trigger source |
| LCD Driver | Supports 1/2 or 1/3 bias, 1/2/1/3/1/4 duty, 4 common outputs (COM0–COM3), 32 segment outputs (SEG0–SEG31) |
| Power Supply Range | 1.8 V to 5.5 V across multiple clock division modes (frequency/2, /4, /8, low-speed) |
| Operating Temperature | –20 °C to +85 °C, rated for standard-grade industrial and consumer applications |
| Package | 80-pin plastic-molded QFP (PRQP0080GB-A, 0.8 mm pitch) |
Pinout & Package
Package: 80-pin plastic-molded QFP (PRQP0080GB-A, 0.8 mm pitch), RoHS-compliant, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / Ground | Main digital power domain; VCC must be 1.8–5.5 V, VSS tied to 0 V reference |
| 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 external quartz crystal only (no external clock input); enables low-power real-time operation |
| RESET | Active-low reset input | Asynchronous reset assertion pulls device into known state; requires external pull-up |
| P00–P07 / P10–P17 | Bi-directional I/O ports | CMOS-compatible 8-bit ports with individual direction control and software pull-up/pull-down |
| P20–P27 | Key input interrupt pins | Dedicated KW0–KW7 inputs with key-on wake-up capability for low-power UI monitoring |
| P60–P67 | Analog input channels | Direct connection to 10-bit A/D converter inputs AN0–AN7; require AVSS and VREF references |
| SEG0–SEG31 / COM0–COM3 | LCD segment/common drivers | Drive multiplexed LCD displays up to 128 segments (4 × 32); VL1–VL3 set LCD bias voltages |
Key Features
| Feature | Design Value |
|---|---|
| ROM correction function | Two 32-byte blocks enable field-programmable ROM patching without hardware modification |
| Low-power operation | 18 µW typical at 32 kHz sub-clock (VCC = 2.5 V), enabling multi-year battery life in standby |
| Interrupt system | 17 sources with 16 vectors-including key-on wake-up-supporting responsive event-driven firmware |
| Serial interface flexibility | Configurable as UART or clock-synchronized mode, simplifying host communication and peripheral sync |
| Real-time port (RTP) | Two pins (RTP0/RTP1) support real-time counting and timestamping independent of main CPU clock |
Applications
| Portable Audio Player UI | Digital Camera Control Panel |
|---|---|
Use Scenario: Battery-powered handheld audio player with segmented LCD display and tactile keypad. IC Role / Device Role / Timing Role: Primary system MCU managing display refresh, button scan, A/D-based battery voltage monitoring, and serial command interface to audio codec. Use Value: Integrated LCD driver eliminates external segment drivers; key-on wake-up reduces average current to <100 µA during standby. | Use Scenario: Entry-level digital camera with monochrome LCD status display and lens control interface. IC Role / Device Role / Timing Role: System controller handling auto-focus timing, exposure calculation, and LCD segment updates synchronized to frame rate. Use Value: Dual clock domains allow continuous RTC operation (via XCIN) while main CPU sleeps, enabling accurate time-stamped image capture. |
| Home Appliance Keypad | Industrial Sensor Display Module |
Use Scenario: Microwave oven or washing machine control panel with LED/LCD display and membrane keypad. IC Role / Device Role / Timing Role: Dedicated UI processor managing key debounce, display multiplexing, and safety-critical timeout supervision via watchdog timer. Use Value: Built-in watchdog timer (8-bit) ensures fail-safe recovery from firmware lockup without external components. | Use Scenario: DIN-rail mounted environmental sensor node with local LCD readout and analog sensor inputs. IC Role / Device Role / Timing Role: Signal acquisition MCU digitizing temperature/humidity sensors (AN0–AN7), driving 4×32-segment LCD, and reporting via UART. Use Value: 10-bit A/D resolution provides >0.1% measurement accuracy over full 0–5 V range with internal reference support. |
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 (49022 user bytes), 2048-byte RAM, same 80-pin QFP package and peripheral set | Higher memory capacity suits more complex UI logic or larger lookup tables | Select when firmware exceeds 32 KB or requires additional RAM for buffering |
| M38235G6FP | 24 KB ROM (24446 user bytes), 768-byte RAM, identical package and peripheral architecture | Reduced memory footprint targets cost-sensitive, function-limited appliances | Select for simpler control tasks where 32 KB ROM is unnecessary and BOM cost is critical |
Compared with M38239GCFP and M38235G6FP, the M38238G8FP#U0 offers balanced memory (32 KB ROM / 1536-byte RAM), making it optimal for mid-tier consumer electronics requiring robust UI and sensing without over-provisioning resources.
Availability
M38238G8FP#U0 is available at Aetrix Electronics and suitable for portable audio players, digital camera control panels, home appliance keypads, and industrial sensor display modules requiring stable component supply and long-term production continuity.
Supply support for M38238G8FP#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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and consumer markets.
The 3823 Group was designed specifically for cost-effective, low-power embedded systems with integrated LCD and analog interfaces-targeting consumer electronics, home appliances, and portable instrumentation.
FAQ
What is the ROM and RAM size of the M38238G8FP#U0?
The M38238G8FP#U0 contains 32 KB of QzROM (with 32,638 bytes available for user code) and 1536 bytes of RAM, which includes dedicated space for LCD display memory and ROM correction buffers. This configuration balances storage for moderate firmware complexity with sufficient data handling for real-time sensor processing and display management in the M38238G8FP#U0.
Does the M38238G8FP#U0 support external crystal oscillators?
Yes, the M38238G8FP#U0 supports external crystal oscillators on both its main clock (XIN/XOUT) and sub-clock (XCIN/XCOUT) inputs. The XIN/XOUT pair accepts ceramic resonators or quartz crystals up to 10 MHz, while XCIN/XCOUT supports quartz crystals only (no external clock input), enabling precise low-power timing for RTC or wake-up functions in the M38238G8FP#U0.
How many LCD segments and commons does the M38238G8FP#U0 drive?
The M38238G8FP#U0 drives up to 32 segment outputs (SEG0–SEG31) and 4 common outputs (COM0–COM3), supporting LCD configurations with 1/2 or 1/3 bias and 1/2, 1/3, or 1/4 duty ratios. This allows direct driving of displays up to 128 segments (4 × 32) without external drivers, a core capability of the M38238G8FP#U0.
What A/D converter resolution and channel count does the M38238G8FP#U0 provide?
The M38238G8FP#U0 integrates a 10-bit successive-approximation A/D converter with 8 input channels (AN0–AN7), configurable for single-ended or differential sampling. It supports software or hardware triggering (including ADT pin), and uses internal or external VREF, delivering consistent 10-bit precision across its full 0–5 V input range in the M38238G8FP#U0.
Is the M38238G8FP#U0 pin-compatible with other 3823 Group devices?
Yes, the M38238G8FP#U0 shares the same 80-pin PRQP0080GB-A QFP package and identical pinout with all FP-suffixed 3823 Group variants (e.g., M38239GCFP, M38235G6FP), enabling drop-in replacement within the same package family. Firmware compatibility depends on memory size and feature enablement, but hardware layout remains unchanged across the M38238G8FP#U0 and its FP-series siblings.
M38238G8FP#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:
- 32KB (32K x 8)
- Program Memory Type:
- QzROM
- EEPROM Size:
- -
- RAM Size:
- 1.5K 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:
M38238G8FP#U0 FAQ
1.How can I place an order for M38238G8FP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M38238G8FP#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 M38238G8FP#U0 reliable?
The price and inventory of M38238G8FP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38238G8FP#U0 is usually 5 days.
3.What payment methods are accepted for M38238G8FP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38238G8FP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38238G8FP#U0?
M38238G8FP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38238G8FP#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 M38238G8FP#U0?
For technical support, including M38238G8FP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38238G8FP#U0 requirements.
6.How does Aetrix verify that M38238G8FP#U0 is sourced from the original manufacturer or authorized distributors?
All M38238G8FP#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 M38238G8FP#U0 meets industry standards.
7.What is the process for return or replacement of M38238G8FP#U0?
All M38238G8FP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M38238G8FP#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 M38238G8FP#U0 part is unused and in its original packaging.
Return procedure for M38238G8FP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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