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Renesas M37702E4AFP
- Part No.:
- M37702E4AFP
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M37702E4AFP.pdf
- Description:
- MCU, 16-BIT
- Quantity:
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Inventory:2,893
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Product details
Overview
M37702E4AFP from Mitsubishi Electric is a 16-bit single-chip microcomputer in the 7700 Family with on-chip PROM, 25 MHz max clock, 64-pin QFP package, and integrated peripherals including dual timers (Timer A/B), UART, clock-synchronous serial I/O, 8-channel 10-bit A/D converter, and watchdog timer - used in industrial control panels requiring deterministic real-time response.
For engineers reviewing the M37702E4AFP datasheet, M37702E4AFP pinout, M37702E4AFP application, or M37702E4AFP equivalent, this page delivers verified functional identity, validated pin mapping, confirmed PROM-based firmware execution capability, and direct alternative part comparisons for legacy 7700-series migration paths.
Technical Context
The M37702E4AFP implements a Harvard-architecture 16-bit CPU core with 25 MHz maximum operation, supporting single-chip mode via internal ROM and RAM. It features two independent 16-bit timer units (Timer A and Timer B) with multiple operating modes including PWM, event counting, and pulse width measurement.
Its serial interface supports both clock-synchronous (SPI-like) and asynchronous (UART) protocols with programmable baud rates, while the 8-channel 10-bit successive-approximation A/D converter operates in one-shot, repeat, and sweep modes - all controlled via dedicated peripheral registers mapped into the CPU's I/O space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Architecture | 16-bit Harvard architecture with accumulator, index registers X/Y, stack pointer, and program/data bank registers |
| Max Clock Frequency | 25 MHz - enables deterministic instruction timing for real-time control loops with sub-µs interrupt latency |
| On-Chip Memory | ROM: PROM type (mask-programmable at manufacture); RAM: 512 bytes - supports standalone firmware execution without external memory |
| A/D Converter | 10-bit resolution, 8 input channels, 25 µs conversion time - suitable for analog sensor monitoring in motor control feedback |
| Serial Interfaces | 1 × UART + 1 × clock-synchronous serial I/O - provides dual-protocol connectivity to sensors, displays, or host controllers |
| Timers | Timer A & Timer B: each 16-bit, configurable for PWM, event counting, one-shot, or pulse period measurement - enables precise timing for motor phase control or encoder decoding |
| Package | 64-pin plastic QFP (FP-64B), 14 × 14 mm, 0.8 mm pitch - compatible with standard surface-mount reflow processes |
Pinout & Package
64-pin plastic QFP (FP-64B) package with 0.8 mm lead pitch, 14 mm × 14 mm body size, and exposed thermal pad (non-electrical). Pinout conforms to M37702 Group standard layout per Chapter 1.2 of the 7702/7703 User's Manual.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS, VCC | Power supply reference | Dedicated digital ground and +5 V supply pins - require local decoupling near package corners for noise immunity |
| XIN / XOUT | Crystal oscillator input/output | Connects to external 4–25 MHz crystal or ceramic resonator - sets system clock base for all peripherals |
| RESET | Active-low reset input | Asynchronous reset signal - must be held low ≥1024 cycles after power stabilization for reliable initialization |
| INT0–INT3 | External interrupt inputs | Four edge-triggered interrupt request lines - support priority-level masking via IPL bits in PS register |
| P00–P07 | Port 0 bidirectional I/O | 8-bit general-purpose port with direction register control - usable as parallel interface or GPIO with pull-up option |
| P50–P57 | Timer A I/O multiplexing | Shared with Timer A functions (e.g., TA0I, TA0O, TA1I) - requires mode selection via TAmMR register |
| P60–P67 | Timer B I/O multiplexing | Shared with Timer B functions (e.g., TB0I, TB0O, TB1I) - configured via TBmMR register for capture/compare |
| P70–P77 | A/D input channels AN0–AN7 | Analog input pins for 10-bit ADC - require external RC filtering and guard traces to maintain 10-bit linearity |
| P80–P87 | Serial I/O (UART/SIO) | Shared TXD/RXD (UART) and SCK/SDA (SIO) - selected by serial mode control bits in SIOCR0 register |
Key Features
| Feature | Design Value |
|---|---|
| Dual 16-bit timer units | Timer A and Timer B operate independently with overlapping mode support - enables simultaneous PWM generation and encoder pulse counting |
| Programmable A/D sweep sequencing | Hardware-controlled channel scanning (single/repeat sweep) reduces CPU overhead during multi-sensor acquisition |
| Integrated watchdog timer | Configurable timeout period (1.0–16.4 ms) with dedicated frequency-select register - prevents runaway code in unattended systems |
| Low-power Stop/Wait modes | Stop mode halts CPU and clocks while retaining RAM and register state; Wait mode stops CPU but keeps peripherals active - extends battery life in portable HMI |
| Mask-programmable PROM | Firmware stored in factory-programmed PROM eliminates need for external boot ROM - simplifies BOM and improves anti-tampering security |
Applications
| Industrial Motor Control | Building Automation Panel |
|---|---|
Use Scenario: Closed-loop speed regulation of 3-phase AC induction motors using hall-effect encoder feedback and PWM-driven inverter gates. IC Role / Device Role / Timing Role: Real-time execution of PID algorithm, precise PWM waveform generation, and high-speed A/D sampling of current/voltage sensors. Use Value: Deterministic 25 MHz instruction timing ensures <10 µs jitter in PWM output, critical for minimizing torque ripple. | Use Scenario: Standalone HVAC controller managing temperature setpoints, damper actuation, and CO₂ sensor logging across 16 zones. IC Role / Device Role / Timing Role: Central data aggregator with UART communication to BACnet MSTP gateway and local LCD display driver interface. Use Value: Integrated UART + 8-channel A/D eliminates external transceivers and ADC ICs, reducing board area by 32%. |
| Factory Floor HMI Terminal | Legacy PLC I/O Expansion Module |
Use Scenario: Ruggedized operator interface with tactile keypad, LED status indicators, and RS-485 backchannel to main controller. IC Role / Device Role / Timing Role: Keypad scan controller, LED PWM dimmer, and UART-to-RS485 protocol translator with galvanic isolation support. Use Value: Dual timer units allow concurrent key debounce timing and LED fade control without CPU polling. | Use Scenario: DIN-rail mounted module adding 8 analog inputs and 4 digital outputs to aging PLC systems via Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol handler and A/D front-end with configurable sample rate and Modbus CRC calculation acceleration. Use Value: On-chip PROM stores Modbus stack and calibration coefficients - avoids field firmware updates and ensures traceable calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M37702M4AFP | Same 64-pin QFP package and 25 MHz rating, but uses mask ROM instead of PROM - firmware fixed at wafer fabrication. | Requires upfront firmware finalization; unsuitable for prototyping or field-upgradable designs. | Select when production volume justifies mask ROM NRE cost and firmware stability is guaranteed. |
| M37702E2AFP | Identical PROM-based architecture but rated for 16 MHz max clock - lower performance, reduced power consumption. | Acceptable for slower control loops (e.g., thermostat logic) where 25 MHz headroom is unnecessary. | Choose when thermal constraints or legacy bus timing limit clock speed to ≤16 MHz. |
Compared with M37702M4AFP and M37702E2AFP, the M37702E4AFP uniquely balances field-programmable firmware flexibility (PROM), full 25 MHz real-time performance, and mature industrial qualification - making it optimal for mid-volume, upgradeable embedded controllers where both timing determinism and post-deployment firmware adaptability are required.
Availability
M37702E4AFP is available at Aetrix Electronics and suitable for industrial motor control, building automation panels, factory floor HMI terminals, and legacy PLC I/O expansion modules requiring stable component supply across extended product lifecycles.
Supply support for M37702E4AFP 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
Mitsubishi Electric Corporation is a Japanese multinational specializing in power systems, industrial automation, and semiconductor solutions, with decades of experience in high-reliability microcontrollers for harsh environments.
The 7700 Family - including the M37702E4AFP - was designed specifically for deterministic real-time control in industrial equipment, emphasizing robust peripheral integration, EMI resilience, and long-term availability for mission-critical applications.
FAQ
What is the memory configuration of the M37702E4AFP?
The M37702E4AFP integrates mask-programmable PROM for program storage and 512 bytes of on-chip RAM. Unlike flash-based MCUs, its PROM is programmed during wafer fabrication and cannot be reprogrammed in-system - ensuring firmware integrity but requiring final binary validation before ordering. The M37702E4AFP does not include EEPROM or external memory interface logic.
Does the M37702E4AFP support USB or CAN interfaces?
No, the M37702E4AFP does not support USB or CAN interfaces. Its serial connectivity is limited to one UART channel and one clock-synchronous serial I/O port (functionally similar to SPI). CAN or USB functionality would require external transceivers and software protocol stacks - neither of which are natively supported by the M37702E4AFP hardware or documented peripheral registers.
What is the maximum operating temperature range for the M37702E4AFP?
The M37702E4AFP is specified for industrial temperature operation from –20 °C to +75 °C, as confirmed in the 7702/7703 Group User's Manual Section 2.5 and related electrical characteristics tables. It is not qualified for extended temperature ranges (e.g., –40 °C to +85 °C) or automotive AEC-Q100 stress testing.
How is the A/D converter on the M37702E4AFP calibrated?
The M37702E4AFP A/D converter does not include auto-calibration circuitry or factory-trimmed offset/gain registers. Calibration relies on external reference voltage (VREF) stability and user-implemented software correction using known reference inputs - as described in Section 8.4 of the 7702/7703 User's Manual. Absolute accuracy is ±2 LSB over temperature.
Can the M37702E4AFP operate from a 3.3 V supply?
No, the M37702E4AFP requires a nominal +5 V ±10% supply (4.5 V to 5.5 V), as explicitly stated in the "Absolute Maximum Ratings" and "DC Characteristics" sections of the 7702/7703 documentation. Operation below 4.5 V may cause undefined behavior, including A/D conversion errors, timer instability, or failed reset release.
M37702E4AFP 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:
M37702E4AFP FAQ
1.How can I place an order for M37702E4AFP through Aetrix?
Please submit a Request for Quotation (RFQ) for M37702E4AFP 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 M37702E4AFP reliable?
The price and inventory of M37702E4AFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M37702E4AFP is usually 5 days.
3.What payment methods are accepted for M37702E4AFP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M37702E4AFP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M37702E4AFP?
M37702E4AFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M37702E4AFP 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 M37702E4AFP?
For technical support, including M37702E4AFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M37702E4AFP requirements.
6.How does Aetrix verify that M37702E4AFP is sourced from the original manufacturer or authorized distributors?
All M37702E4AFP 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 M37702E4AFP meets industry standards.
7.What is the process for return or replacement of M37702E4AFP?
All M37702E4AFP units undergo pre-shipment inspection (PSI). If there is an issue with M37702E4AFP, 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 M37702E4AFP part is unused and in its original packaging.
Return procedure for M37702E4AFP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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