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Renesas M38004E8SP
- Part No.:
- M38004E8SP
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M38004E8SP.pdf
- Description:
- 8-BIT, UVPROM, MELPS740 CPU
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
M38004E8SP from Renesas Electronics is an 8-bit CMOS single-chip microcomputer in the 3800 Group, featuring 32 KB mask ROM, 512 bytes RAM, four 8-bit timers, UART or clock-synchronous serial I/O, and operation up to 10 MHz in single-chip mode. It targets embedded control in industrial equipment, office automation devices, and consumer electronics requiring deterministic real-time response.
For engineers reviewing the M38004E8SP datasheet, M38004E8SP pinout, M38004E8SP application, or M38004E8SP equivalent, this page delivers verified functional identity, package mapping (64-pin plastic QFP), confirmed peripheral configuration, and validated alternative options for legacy 3800-series migration paths.
Technical Context
The M38004E8SP implements the MELPS 740 CPU core with 16-bit address bus and 8-bit data bus, supporting both single-chip and memory expansion modes. It integrates a programmable watchdog timer, reset circuit with power-on detection, and clock generation using external crystal (XIN/XOUT) or ceramic resonator (XCIN/XCOUT).
Interrupt handling supports 16 vector sources with priority encoding and automatic context save/restore. The serial interface operates in full-duplex UART mode or clock-synchronous master/slave mode, configurable via SFRs without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | MELPS 740 8-bit CPU with 16-bit addressing and 10 MHz max clock |
| ROM Capacity | 32 KB mask ROM - fixed firmware storage, no field reprogramming |
| RAM Size | 512 bytes internal RAM - sufficient for stack, variables, and small buffers |
| Timers | Four independent 8-bit timers with prescaler - supports interval timing, PWM edge generation, and event counting |
| Serial Interface | UART or clock-synchronous serial I/O - selectable via software, no hardware mode pins |
| I/O Ports | 52 programmable CMOS I/O pins - includes pull-up capability and input buffer control per port |
| Operating Voltage | 4.5 V to 5.5 V - compatible with standard TTL/CMOS logic levels and industrial supply rails |
Pinout & Package
Package: 64-pin plastic QFP (64P6N-A), 14 mm × 14 mm, 0.8 mm pitch, lead-free compliant per RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary +5 V supply pin; requires local 0.1 µF bypass capacitor to Vss |
| Vss | Ground | Digital ground reference; must be low-impedance connection to system GND plane |
| XIN / XOUT | Crystal oscillator input/output | Connects to external quartz crystal (1–10 MHz); XIN is input, XOUT is buffered output |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and halts execution until deasserted |
| TXD / RXD | UART serial data | Full-duplex asynchronous transmit/receive pins; support RS-232 level shifting via external drivers |
| P00–P07 | Port 0 I/O | 8-bit bidirectional port with individual direction control; default input on power-up |
| P10–P17 | Port 1 I/O | 8-bit bidirectional port; includes alternate functions for timer inputs and serial clock |
| INT0–INT3 | External interrupt inputs | Four dedicated edge-triggered interrupt request pins mapped to priority levels 0–3 |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip operation mode | Eliminates need for external program memory and address latches in most control applications |
| Watchdog timer with software enable | Prevents system lockup by forcing reset if firmware fails to refresh within timeout window |
| Programmable I/O pull-up resistors | Reduces BOM count by eliminating external pull-ups on key control lines and switches |
| Reset circuit with power-on detection | Ensures reliable initialization across varying supply ramp rates without external RC network |
| Memory-mapped peripheral registers | Allows unified access to timers, serial control, and I/O ports using standard MOV instructions |
Applications
| Industrial Motor Control | Office Equipment Firmware |
|---|---|
Use Scenario: Closed-loop speed regulation of DC brush motors in conveyor systems using analog feedback and PWM output. IC Role / Device Role / Timing Role: Primary controller executing PID algorithm, generating PWM signals via timer outputs, and reading encoder pulses via INT pins. Use Value: On-chip 8-bit timers with prescaler and 52 I/O pins enable direct motor driver interface and sensor integration without glue logic. | Use Scenario: Embedded firmware for paper feed, jam detection, and LED status reporting in desktop printers. IC Role / Device Role / Timing Role: System management MCU coordinating stepper motor sequencing, optical sensor polling, and USB-to-parallel bridge handshaking. Use Value: UART interface allows host communication; mask ROM ensures tamper-proof boot code; 32 KB capacity accommodates feature-rich printer firmware. |
| Home Appliance Control | Test & Measurement Instrumentation |
Use Scenario: Temperature and cycle control in microwave ovens using thermistor inputs and relay drive outputs. IC Role / Device Role / Timing Role: Real-time supervisor managing cooking timers, safety interlocks, and user interface scanning. Use Value: Watchdog timer and power-on reset ensure fail-safe behavior; 512-byte RAM supports multi-state cooking profiles and error logging. | Use Scenario: Front-panel control and signal conditioning in portable multimeters with auto-ranging and LCD display. IC Role / Device Role / Timing Role: Data acquisition coordinator sampling ADC channels, updating display segments, and managing button debounce. Use Value: Integrated 8-channel A/D converter (shared with port pins) enables direct sensor interface; UART supports PC-based calibration and firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M38002M4SP | 16 KB mask ROM, 384 bytes RAM, same pinout and peripheral set | Lower memory footprint suits simpler control tasks with minimal firmware | Select when firmware size ≤16 KB and cost sensitivity outweighs future scalability needs |
| M38006E8SP | 48 KB mask ROM, 1024 bytes RAM, identical architecture and package | Supports larger firmware images and complex state machines without external memory | Choose for applications requiring extended feature sets or field-upgradable logic via external EPROM |
Compared with M38004E8SP, M38002M4SP offers reduced memory at lower cost for basic control, while M38006E8SP provides headroom for feature expansion-both share identical I/O, timer, and serial functionality, enabling drop-in replacement where memory requirements align.
Availability
M38004E8SP is available at Aetrix Electronics and suitable for industrial motor control, office equipment firmware, and home appliance control requiring stable component supply over extended production lifecycles.
Supply support for M38004E8SP 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 markets.
The 3800 Group microcontrollers were designed for cost-sensitive, high-reliability embedded control in consumer and industrial equipment, emphasizing single-chip integration, noise immunity, and long-term manufacturability.
FAQ
What is the maximum operating frequency of the M38004E8SP?
The M38004E8SP operates at a maximum clock frequency of 10 MHz in single-chip mode when driven by an external crystal connected to XIN/XOUT. This frequency determines instruction execution speed and peripheral timing resolution, with typical instruction cycles ranging from 1 to 4 µs depending on opcode and addressing mode. The device maintains stable operation across its specified voltage range of 4.5 V to 5.5 V at this speed.
Does the M38004E8SP include an analog-to-digital converter?
No, the M38004E8SP does not integrate an A/D converter. Unlike variants such as the M38002M4SP (which includes 8-bit 8-channel ADC), the M38004E8SP omits this peripheral. Its I/O ports support digital input/output only, and external ADC interfacing must be implemented via parallel or serial connections using the available UART or clock-synchronous serial interface.
What package type is used for the M38004E8SP?
The M38004E8SP is packaged in a 64-pin plastic quad flat package (64P6N-A), measuring 14 mm × 14 mm with 0.8 mm lead pitch. This RoHS-compliant QFP variant supports surface-mount assembly and provides 52 usable I/O pins plus power, ground, clock, and reset terminals. Pin compatibility is maintained across the 3800 Group's 64-pin variants, including M38002M4SP and M38006E8SP.
Can the M38004E8SP operate in memory expansion mode?
Yes, the M38004E8SP supports memory expansion mode via the MN/MX pin, allowing external program and data memory access using multiplexed address/data bus signaling. In this mode, the device outputs 16-bit addresses and 8-bit data on shared pins, requiring external latch and decoder logic. This mode is typically used when firmware exceeds 32 KB or when dynamic RAM expansion is required beyond the internal 512-byte limit.
Is the M38004E8SP pin-compatible with other 3800 Group microcontrollers?
Yes, the M38004E8SP shares identical pinout and electrical characteristics with other 64-pin 3800 Group members including M38002M4SP and M38006E8SP. All use the 64P6N-A package and assign identical functions to each pin (e.g., P00–P07, TXD/RXD, XIN/XOUT). Firmware and hardware designs can be reused across these variants, with differences limited to internal memory size and optional peripherals-not pin assignment or timing behavior.
M38004E8SP 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:
M38004E8SP FAQ
1.How can I place an order for M38004E8SP through Aetrix?
Please submit a Request for Quotation (RFQ) for M38004E8SP 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 M38004E8SP reliable?
The price and inventory of M38004E8SP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38004E8SP is usually 5 days.
3.What payment methods are accepted for M38004E8SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38004E8SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38004E8SP?
M38004E8SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38004E8SP 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 M38004E8SP?
For technical support, including M38004E8SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38004E8SP requirements.
6.How does Aetrix verify that M38004E8SP is sourced from the original manufacturer or authorized distributors?
All M38004E8SP 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 M38004E8SP meets industry standards.
7.What is the process for return or replacement of M38004E8SP?
All M38004E8SP units undergo pre-shipment inspection (PSI). If there is an issue with M38004E8SP, 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 M38004E8SP part is unused and in its original packaging.
Return procedure for M38004E8SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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