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Renesas M38C29FFAHP
- Part No.:
- M38C29FFAHP
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M38C29FFAHP.pdf
- Description:
- 8-BIT, FLASH, 5MHZ
- Quantity:
- Payment:
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Inventory:6,070
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Product details
Overview
M38C29FFAHP 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 serial I/O (UART or clock-synchronized), and PWM outputs (10-bit × 2, 16-bit × 1). It operates from 2.5 V to 5.5 V in frequency/4 mode at 8 MHz and supports –20 to +85°C industrial temperature range - deployed in portable instrumentation with segmented LCD displays and analog sensor interfaces.
For engineers reviewing the M38C29FFAHP datasheet, M38C29FFAHP pinout, M38C29FFAHP application, or M38C29FFAHP equivalent, key selection criteria include flash memory size (49152 bytes user area), RAM capacity (2048 bytes), 64-pin QFP package compatibility, LCD bias/duty configuration flexibility (1/2, 1/3, 1/4), and dual clock system (main XIN/XOUT + sub-clock XCIN/XCOUT) for low-power operation.
Technical Context
The M38C29FFAHP implements the standard 740 Family instruction set with 71 basic 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 conditional branching via Carry, Zero, Overflow, and Negative flags.
System timing is managed by two independent clock circuits: main oscillator (XIN/XOUT, ceramic resonator or quartz crystal) and sub-clock (XCIN/XCOUT, 32 kHz), enabling dynamic switching between high-speed operation and ultra-low-power modes. The device integrates dedicated hardware peripherals including four 8-bit timers, two 16-bit timers, watchdog timer, real-time port inputs, and LED direct-drive capability (8 pins, 15 mA avg, 30 mA peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 740 Family 8-bit CPU with 71 instructions and 0.40 µs min instruction cycle at 10 MHz |
| Memory (ROM/Flash) | 49152 bytes total ROM; 49022 bytes user-programmable space (first 128 B and last 2 B reserved) |
| RAM Size | 2048 bytes general-purpose RAM plus 12-byte dedicated LCD display RAM |
| A-D Converter | 10-bit resolution × 8 channels with internal reference voltage input (VREF) and analog ground (AVSS) |
| LCD Driver | Supports 1/2, 1/3, or 1/4 duty ratio; 4 common outputs (COM0–COM3) and 24 segment outputs (SEG0–SEG23) |
| Supply Voltage Range | 2.5 V to 5.5 V in frequency/4 mode at 8 MHz; 2.5 V to 5.5 V in low-speed mode at 32 kHz |
| Operating Temperature | –20°C to +85°C industrial grade, qualified per Renesas "Standard" quality classification |
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 I/O port | Configurable as 4-bit bidirectional I/O or LCD segment drivers; support pull-up control per bit |
| P26 / VL1, P27 / VL2 | LCD power source input | Accept 0 ≤ VL1 ≤ VL2 ≤ VL3 ≤ VCC; define LCD bias voltages for 1/2, 1/3, or 1/4 duty operation |
| COM0–COM3 | LCD common output | 4 dedicated outputs for multiplexed LCD drive; COM2/COM3 unused in 1/2-duty mode |
| 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 crystal for low-power real-time operation; enables clock domain switching |
| VREF | Analog reference voltage input | Provides precision reference for 10-bit A-D converter; requires stable low-noise supply |
| RESET | Active-low reset input | Asynchronous reset signal; must be held low ≥ 100 ns for reliable initialization |
Key Features
| Feature | Design Value |
|---|---|
| Dual clock system | Independent main (XIN/XOUT) and sub-clock (XCIN/XCOUT) domains enable seamless low-power mode transitions without firmware overhead |
| Integrated LCD controller | Hardware-driven 4×24 segment mapping eliminates CPU polling; supports static, 1/2, 1/3, and 1/4 duty configurations with programmable bias |
| High-resolution analog interface | 10-bit A-D converter with 8 selectable input channels and dedicated AVSS/VREF pins ensures ±1 LSB accuracy under specified VCC conditions |
| LED direct-drive capability | Eight I/O pins rated for 15 mA average / 30 mA peak current (90 mA total) simplify front-panel indicator design without external drivers |
| Flash memory architecture | 49152-byte flash with 49022-byte user area supports in-system programming and field firmware updates without UV erasure |
Applications
| Portable Medical Instruments | Industrial Panel Meters |
|---|---|
|
Use Scenario: Battery-powered blood glucose meters and pulse oximeters requiring segmented LCD display, analog sensor signal acquisition, and low standby power. IC Role / Device Role / Timing Role: Central controller managing LCD refresh, ADC sampling of photodiode/thermistor signals, serial communication with host, and real-time clock via sub-clock domain. Use Value: Integrated LCD driver and 10-bit ADC eliminate discrete support components; 2.5 V minimum operating voltage extends battery life in coin-cell or AA-powered designs. |
Use Scenario: DIN-rail mounted process monitors measuring temperature, pressure, or flow using analog transducers and displaying values on 4-digit LCDs. IC Role / Device Role / Timing Role: Main MCU executing PID control loops, driving 4-segment LCD with 1/3 bias, reading 4–20 mA loop inputs via ADC, and communicating via UART to PLC or SCADA systems. Use Value: Dual serial I/O allows simultaneous Modbus RTU (UART1) and local debug interface (UART2); 2048-byte RAM accommodates multiple calibration tables and buffer storage. |
| Smart Home Thermostats | Appliance Control Panels |
|
Use Scenario: HVAC thermostats with ambient temperature/humidity sensing, backlit segmented LCD, and IR or wired communication to furnace controllers. IC Role / Device Role / Timing Role: System-on-chip handling sensor fusion (AN0–AN7), LCD segment multiplexing, push-button key scan (KW0–KW7), and sub-clock-based scheduling for periodic wake-up events. Use Value: Built-in key interrupt inputs (KW0–KW7) reduce GPIO count; 32 kHz sub-clock enables accurate 1-second interrupts for thermostat scheduling with <1 µA sleep current. |
Use Scenario: Microwave oven or washing machine control panels needing robust EMI immunity, LED indicators, and analog potentiometer-based user input. IC Role / Device Role / Timing Role: Primary UI controller driving 24-segment display, scanning rotary encoder or potentiometer via ADC, managing 8 LED outputs, and executing safety-critical timing sequences. Use Value: LED direct-drive ports deliver 15 mA per pin without external transistors; watchdog timer ensures fail-safe recovery from software hangs during cooking cycles. |
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 | RL78/G13 core, 32 MHz max, 64 KB flash, 4 KB RAM, no integrated LCD driver | Requires external LCD controller or segment driver IC; better suited for higher-speed control tasks than display-centric designs | Select when migrating to modern low-power RL78 architecture with larger memory and enhanced peripherals, accepting added BOM cost for LCD support |
| M38C29MCAHP | Mask ROM version (24576 bytes user ROM), same 64P6Q-A package, identical peripheral set and pinout | Fixed firmware only; suitable for high-volume, cost-sensitive production where field updates are unnecessary | Choose for mature, unchanging firmware deployments where flash reprogrammability is not required and unit cost optimization is critical |
Compared with R5F100PLAFB and M38C29MCAHP, the M38C29FFAHP uniquely balances legacy 740-family software compatibility, on-chip LCD driving, and field-upgradable flash - making it optimal for sustaining existing designs requiring display integration and moderate computational load.
Availability
M38C29FFAHP is available at Aetrix Electronics and suitable for portable medical instruments, industrial panel meters, and smart home thermostats requiring stable component supply across multi-year production cycles.
Supply support for M38C29FFAHP 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 IoT applications.
The 38C2 Group (A Version) was designed specifically for cost-effective, display-intensive embedded systems requiring integrated LCD driving, analog sensing, and low-voltage operation in industrial and consumer equipment.
FAQ
What is the maximum operating frequency supported by the M38C29FFAHP?
The M38C29FFAHP supports a maximum oscillation frequency of 10 MHz on its main clock (XIN/XOUT), delivering a minimum instruction execution time of 0.40 µs. In frequency/2 mode at 10 MHz, the system clock runs at 5 MHz; in frequency/4 mode, it operates at 2.5 MHz - all within the specified 2.5 V to 5.5 V supply range for flash versions.
Does the M38C29FFAHP support in-system programming (ISP)?
Yes, the M38C29FFAHP supports in-system programming via its on-chip flash memory. Programming is performed using the dedicated VPP pin (P60/CNTR1) during flash mode, with VPP connected to VSS during normal operation. Renesas-provided tools and protocols enable field firmware updates without removing the device from the PCB.
How many LCD segments can the M38C29FFAHP drive simultaneously?
The M38C29FFAHP drives up to 24 LCD segments and 4 commons (COM0–COM3), supporting static, 1/2, 1/3, and 1/4 duty configurations. Segment outputs map directly to P00–P03, P04–P07, P10–P17, P20–P25, and P26–P27, enabling full 4×24 multiplexed display control without external segment drivers.
What is the purpose of the VL1, VL2, and VL3 pins on the M38C29FFAHP?
VL1, VL2, and VL3 are LCD power source input pins that define bias voltages for the internal LCD driver circuit. They accept voltages satisfying 0 ≤ VL1 ≤ VL2 ≤ VL3 ≤ VCC and determine contrast and drive strength for 1/2, 1/3, or 1/4 duty LCD operation - with VL3 serving as the highest-level bias reference and VL1 as the lowest.
Can the M38C29FFAHP operate from a single 3.3 V supply?
Yes, the M38C29FFAHP operates from 2.5 V to 5.5 V, fully supporting 3.3 V nominal supply. In frequency/4 mode at 8 MHz or low-speed mode at 32 kHz, it maintains full functionality including LCD driving, ADC conversion, and serial I/O - with typical power dissipation of 25 mW (frequency/2 at 8 MHz, VCC = 5 V) and 375 µW (low-speed at 32 kHz, VCC = 3 V).
M38C29FFAHP 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 FAQ
1.How can I place an order for M38C29FFAHP through Aetrix?
Please submit a Request for Quotation (RFQ) for M38C29FFAHP 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 reliable?
The price and inventory of M38C29FFAHP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38C29FFAHP is usually 5 days.
3.What payment methods are accepted for M38C29FFAHP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38C29FFAHP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38C29FFAHP?
M38C29FFAHP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38C29FFAHP 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?
For technical support, including M38C29FFAHP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38C29FFAHP requirements.
6.How does Aetrix verify that M38C29FFAHP is sourced from the original manufacturer or authorized distributors?
All M38C29FFAHP 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 meets industry standards.
7.What is the process for return or replacement of M38C29FFAHP?
All M38C29FFAHP units undergo pre-shipment inspection (PSI). If there is an issue with M38C29FFAHP, 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 part is unused and in its original packaging.
Return procedure for M38C29FFAHP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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