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Renesas M38C29FFAHP#U0
- Part No.:
- M38C29FFAHP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M38C29FFAHP#U0.pdf
- Description:
- MICROCONTROLLER, 8 BIT, 740/38C2
- Quantity:
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- Shipping:
Inventory:162
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Product details
Overview
M38C29FFAHP#U0 from Renesas Electronics is a single-chip 8-bit CMOS microcomputer based on the 740 family core, featuring integrated LCD drive control (4 COM × 24 SEG), 10-bit 8-channel A-D converter, dual UART/clock-synchronous serial I/O, and PWM outputs (10-bit × 2, 16-bit × 1). It operates from 2.5 V to 5.5 V and targets low-power embedded instrumentation with display and analog sensing.
For engineers reviewing the M38C29FFAHP#U0 datasheet, M38C29FFAHP#U0 pinout, M38C29FFAHP#U0 application, or M38C29FFAHP#U0 equivalent, key selection criteria include flash memory size (49,152 bytes), RAM capacity (2,048 bytes), 64-pin QFP package compatibility, and support for 1/2–1/4 LCD bias/duty configurations in industrial temperature range (–20 to +85°C).
Technical Context
The M38C29FFAHP#U0 implements the standard 740 Family instruction set with 71 machine-language instructions and a minimum instruction execution time of 0.40 µs at 10 MHz. Its CPU includes an 8-bit accumulator, dual 8-bit index registers (X/Y), 8-bit stack pointer, and 16-bit program counter, with processor status register supporting carry, zero, interrupt disable, decimal mode, overflow, and negative flags.
It integrates two independent clock systems - main clock (XIN/XOUT, ceramic resonator or quartz crystal) and sub-clock (XCIN/XCOUT, 32 kHz) - enabling flexible power management modes including frequency/4 (2.5–5.5 V) and low-speed (2.5–5.5 V at 32 kHz). The device supports 18 interrupt sources with 16 vectors and features hardware timers (8-bit × 4, 16-bit × 2), watchdog timer (8-bit), and real-time port inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 740 Family 8-bit CPU with 71 instructions; enables legacy code reuse and deterministic timing for real-time control loops. |
| Flash Memory Size | 49,152 bytes (49,022 user-accessible); sufficient for complex firmware with LCD GUI, sensor processing, and communication stacks. |
| RAM Capacity | 2,048 bytes; supports large data buffers for A-D sampling, display frame storage, and interrupt service context preservation. |
| A-D Converter | 10-bit resolution × 8 channels; provides 0.1% measurement accuracy for analog sensor interfacing without external signal conditioning. |
| LCD Driver | 4 common × 24 segment outputs with selectable 1/2, 1/3, or 1/4 duty ratio and 1/2 or 1/3 bias; drives multiplexed character or segment displays directly. |
| Supply Voltage Range | 2.5 V to 5.5 V across all operating modes; allows direct interface with 3.3 V or 5 V system rails without level-shifting. |
| Operating Temperature | –20°C to +85°C; qualified for industrial environments including factory automation panels and HVAC controllers. |
Pinout & Package
Package: 64-pin plastic molded QFP (64P6Q-A), 0.5 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P03 / SEG0–SEG3 | LCD segment output / general-purpose I/O | Shared pins support direct LCD segment drive or digital I/O; pull-up configurable per bit for keypad scanning. |
| COM0–COM3 | LCD common output | Four dedicated common lines enable 1/2–1/4 multiplexing; COM2/COM3 disabled in 1/2-duty mode. |
| XIN / XOUT | Main clock oscillator input/output | Internal feedback resistor enables direct connection to ceramic resonator (4–10 MHz) or quartz crystal; no external components required. |
| XCIN / XCOUT | Sub-clock oscillator input/output | Supports 32 kHz tuning fork crystal for RTC or ultra-low-power sleep mode operation. |
| P40–P47 / AN0–AN7 | Analog input / digital I/O | Eight dedicated A-D input channels with internal reference; share pins with OOUT0/OOUT1 and real-time port functions. |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and halts execution; compatible with RC or supervisor IC reset circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Dual clock domains | Independent main (XIN/XOUT) and sub-clock (XCIN/XCOUT) systems enable seamless transition between high-speed operation and µA-level sleep current (375 µW at 32 kHz). |
| Integrated LCD controller | Hardware-driven 4×24 segment driver eliminates need for external LCD driver IC, reducing BOM count and PCB area in display-centric designs. |
| Flexible serial interfaces | Two independent serial I/O modules support UART or clock-synchronous modes simultaneously, enabling concurrent host communication and peripheral daisy-chaining. |
| IGBT-compatible PWM | 16-bit PWM channel shared with IGBT output function provides precise gate drive timing for motor control or power conversion stages. |
| Real-time port inputs | RTP0/RTP1 pins (P46/P47) offer dedicated edge-triggered inputs for fast event capture (e.g., encoder pulses or safety interlocks) without CPU polling overhead. |
Applications
| Industrial Panel Meter | Medical Diagnostic Device |
|---|---|
|
Use Scenario: Standalone voltage/current meter with 4-digit LCD display, front-panel buttons, and analog sensor inputs. IC Role / Device Role / Timing Role: Central controller executing A-D sampling, LCD refresh, keypad scan, and calibration routines in real time. Use Value: Integrated 10-bit A-D converter and 4×24 LCD driver eliminate external ADC and display driver ICs, reducing component count by ≥3 and board space by 25%. |
Use Scenario: Portable blood glucose monitor with segmented LCD, button interface, and electrochemical sensor signal conditioning. IC Role / Device Role / Timing Role: System-on-chip managing sensor excitation, analog acquisition, display update, and battery monitoring. Use Value: 2.5 V minimum supply enables direct use of single-cell Li-ion battery; low-speed sub-clock mode extends battery life to >1 year in standby. |
| Home Appliance Control | Building Automation Sensor Node |
|
Use Scenario: Microwave oven control panel with LED indicators, membrane keypad, and temperature sensor feedback. IC Role / Device Role / Timing Role: Primary MCU handling user input, cooking cycle timing, safety interlock monitoring, and display output. Use Value: 18 interrupt sources and 16 vectors allow responsive handling of door switch, thermal cutoff, and keypad events without polling latency. |
Use Scenario: Wireless HVAC sensor node measuring ambient temperature/humidity and reporting via UART to gateway. IC Role / Device Role / Timing Role: Low-power sensor aggregator performing periodic A-D reads, LCD status display, and UART transmission bursts. Use Value: Frequency/4 mode (2.5–5.5 V) and 375 µW low-speed operation enable energy harvesting compatibility with solar or thermal harvesters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M38C29MCAHP#U0 | Mask ROM version (49,152-byte ROM), no in-system reprogrammability; identical pinout and peripheral set. | Suitable for high-volume, fixed-function products where firmware updates are unnecessary. | Select when production volume justifies mask ROM NRE cost and firmware stability is guaranteed. |
| RL78/G13 R5F100LEA | 16-bit RL78 core, 64 KB flash, 4 KB RAM, enhanced peripherals (DMA, data flash), different pinout and memory map. | Better suited for next-generation designs requiring higher performance, larger code space, or advanced low-power features. | Choose for new designs needing scalability beyond 8-bit constraints; not drop-in compatible. |
Compared with M38C29FFAHP#U0, the M38C29MCAHP#U0 offers identical functionality with permanent firmware, while the RL78/G13 provides architectural advancement at the cost of redesign effort - making the former ideal for cost-sensitive legacy replacements and the latter for future-proofed development.
Availability
M38C29FFAHP#U0 is available at Aetrix Electronics and suitable for industrial panel meters, medical diagnostic devices, home appliance controls, and building automation sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for M38C29FFAHP#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 industrial, automotive, and IoT applications.
The 38C2 Group (A Version) was designed specifically for cost-sensitive, display-integrated embedded systems requiring integrated LCD driving, analog sensing, and robust real-time control - targeting industrial instrumentation and consumer appliances.
FAQ
What is the maximum operating frequency of the M38C29FFAHP#U0?
The M38C29FFAHP#U0 achieves a minimum instruction execution time of 0.40 µs at 10 MHz oscillation frequency in frequency/2 mode. Its main clock supports up to 10 MHz using an external ceramic resonator or quartz crystal connected between XIN and XOUT pins. Operation above 10 MHz is not supported per the official datasheet.
Does the M38C29FFAHP#U0 support in-circuit programming?
Yes, the M38C29FFAHP#U0 is a Flash memory version and supports in-system programming via its serial I/O interfaces. Programming requires Renesas' dedicated flash programming tools and adheres to specific voltage and timing sequences defined in the 38C2 Group Flash Memory Programming Manual.
How many LCD segments can the M38C29FFAHP#U0 drive simultaneously?
The M38C29FFAHP#U0 drives up to 24 segment outputs across 4 common lines (COM0–COM3), supporting 1/2, 1/3, or 1/4 duty ratio configurations. At 1/4 duty, it can control up to 96 distinct LCD segments (4 COM × 24 SEG), enabling alphanumeric or custom symbol displays.
What is the power consumption of the M38C29FFAHP#U0 in low-speed mode?
In low-speed mode at 32 kHz oscillation frequency and VCC = 3 V, the M38C29FFAHP#U0 consumes 375 µW. This ultra-low power state is enabled by switching the system clock to the sub-clock oscillator (XCIN/XCOUT), making it suitable for battery-powered applications requiring multi-year operation.
Is the M38C29FFAHP#U0 RoHS compliant?
Yes, the M38C29FFAHP#U0 is RoHS compliant and manufactured in accordance with EU Directive 2011/65/EU. The 64P6Q-A package uses lead-free solderable terminations and meets all restricted substance thresholds specified in the standard.
M38C29FFAHP#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:
M38C29FFAHP#U0 FAQ
1.How can I place an order for M38C29FFAHP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M38C29FFAHP#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 M38C29FFAHP#U0 reliable?
The price and inventory of M38C29FFAHP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38C29FFAHP#U0 is usually 5 days.
3.What payment methods are accepted for M38C29FFAHP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38C29FFAHP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38C29FFAHP#U0?
M38C29FFAHP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38C29FFAHP#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 M38C29FFAHP#U0?
For technical support, including M38C29FFAHP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38C29FFAHP#U0 requirements.
6.How does Aetrix verify that M38C29FFAHP#U0 is sourced from the original manufacturer or authorized distributors?
All M38C29FFAHP#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 M38C29FFAHP#U0 meets industry standards.
7.What is the process for return or replacement of M38C29FFAHP#U0?
All M38C29FFAHP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M38C29FFAHP#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 M38C29FFAHP#U0 part is unused and in its original packaging.
Return procedure for M38C29FFAHP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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