My Inquiry
My Account
Renesas M38227ECHP#U1
- Part No.:
- M38227ECHP#U1
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M38227ECHP#U1.pdf
- Description:
- 8-BIT, 740/3822 CPU
- Quantity:
- Payment:
- Shipping:
Inventory:152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M38227ECHP#U1 from Renesas Electronics is an 8-bit CMOS microcontroller based on the 740 family core, featuring integrated LCD drive control (1/2–1/4 duty, up to 4 commons and 32 segments), 8-channel 8-bit A-D converter, three 8-bit timers and two 16-bit timers, UART or clock-synchronized serial I/O, and 49 programmable I/O ports. It targets embedded display control in consumer appliances requiring low-power operation and analog sensing.
For engineers reviewing the M38227ECHP#U1 datasheet, M38227ECHP#U1 pinout, M38227ECHP#U1 application, or M38227ECHP#U1 equivalent, key selection criteria include its 48 KB Mask ROM + 1024-byte RAM configuration, 80-pin QFP (80P6Q-A) package with dedicated LCD segment/common drivers, sub-3V extended temperature support (–40°C to +85°C), and dual clock system (main crystal + sub-clock oscillator).
Technical Context
The M38227ECHP#U1 implements the 740-family instruction set with 71 basic machine-language instructions and a minimum instruction execution time of 0.5 µs at 8 MHz. Its CPU includes accumulator A, index registers X/Y, and stack pointer S, supporting indexed addressing and interrupt-driven operation with 17 sources and 16 vectors.
It integrates two independent clock generating circuits: one for main system clock (via XIN/XOUT with ceramic resonator or quartz crystal), and another for sub-clock (via XCIN/XCOUT) used for real-time port functions and low-power wake-up. The LCD controller supports bias ratios of 1/2 or 1/3 and duty cycles of 1/2, 1/3, or 1/4, with VL1–VL3 voltage inputs and COM0–COM3 outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit 740-family CPU with 71 instructions; supports indexed addressing and subroutine calls via 8-bit stack pointer. |
| ROM / RAM | 48 KB Mask ROM (user area: 49022 bytes); 1024 bytes RAM - sufficient for complex display + sensor firmware without external memory. |
| Operating Voltage | 2.0 V to 5.5 V across –40°C to +85°C - enables direct battery operation (e.g., 2×AA) and compatibility with 3.3 V/5 V systems. |
| Power Dissipation | 32 mW at 8 MHz / 5 V (high-speed mode); 45 µW at 32 kHz / 3 V (low-speed mode) - supports ultra-low-power standby with key-wake capability. |
| LCD Driver | Supports 1/2 or 1/3 bias, 1/2/1/3/1/4 duty; 4 commons (COM0–COM3), 32 segments (SEG0–SEG31) - drives multiplexed character or segment displays directly. |
| A-D Converter | 8-bit resolution, 8 input channels (AN0–AN7), internal reference (VREF) - suitable for temperature, light, or potentiometer sensing in appliance UIs. |
| Timers & Serial | Three 8-bit timers (T1–T3), two 16-bit timers (TX, TY), one UART or synchronous serial I/O - enables precise timing, PWM generation, and host communication. |
Pinout & Package
Package: 80P6Q-A - 80-pin plastic-molded QFP with 0.5 mm pitch, RoHS-compliant, designed for high-density consumer PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / Ground | Primary digital power domain; VCC must be 2.0–5.5 V; VSS is analog/digital common ground. |
| XIN / XOUT | Main clock oscillator interface | Connects external quartz crystal or ceramic resonator (e.g., 4–8 MHz); internal feedback resistor enables self-oscillation. |
| XCIN / XCOUT | Sub-clock oscillator interface | Drives 32.768 kHz watch crystal for RTC functions and low-power wake-up; no external clock input supported. |
| COM0–COM3 | LCD common outputs | Drive LCD backplane electrodes; COM2/COM3 unused at 1/2 duty; COM3 unused at 1/3 duty. |
| SEG0–SEG31 | LCD segment outputs | Direct drive for up to 32 LCD frontplane segments; mapped across P00–P17, P34–P37, P41, and dedicated SEG pins. |
| P60–P67 | Analog inputs (AN0–AN7) | 8-channel single-ended A-D inputs; share pins with Port P6; require AVSS and VREF for accurate conversion. |
| P44 / P45 | Serial I/O (RXD / TXD) | Full-duplex UART interface; supports asynchronous communication with standard baud rates; no hardware flow control. |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and halts execution; requires external pull-up and debounced signal. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD controller | Eliminates external segment drivers; supports 4×32 dot-matrix or 16-character alphanumeric displays with software-configurable bias/duty. |
| 17-source interrupt system | Enables responsive UI handling - including key-on-wake (P34–P37), timer overflows, serial receive, and A-D completion - without polling overhead. |
| Dual clock domains | Allows simultaneous high-speed processing (main clock) and ultra-low-power RTC operation (sub-clock), reducing system-level power by >90% in sleep modes. |
| Software-configurable I/O | All ports (P0–P7) support individual direction control and pull-up/pull-down enable - simplifies board design and reduces external bias components. |
| Extended temperature grade | Rated for –40°C to +85°C operation with 2.0–5.5 V supply - qualified for refrigerators, HVAC controls, and outdoor consumer devices. |
Applications
| Refrigerator Control Panel | Smart Microwave Oven UI |
|---|---|
Use Scenario: Real-time temperature monitoring, keypad scanning, and 4-digit segmented LCD display with backlight dimming. IC Role / Device Role / Timing Role: Primary system MCU managing sensor reads (AN0–AN3), key wake interrupts (P34–P37), and driving 4×7-segment LCD via COM0–COM1 and SEG0–SEG27. Use Value: Single-chip integration eliminates discrete LCD driver and A-D converter, reducing BOM cost and PCB area by 35% versus multi-chip solutions. |
Use Scenario: Cook time countdown, power level selection, and status icon animation on a 2-line character LCD. IC Role / Device Role / Timing Role: Main controller executing cooking logic, updating display via 16-bit Timer Y for precise 1-second ticks, and managing UART debug output to service port. Use Value: Built-in 16-bit timers and UART eliminate need for external timing ICs or level shifters, accelerating time-to-market for certified kitchen appliances. |
| Portable Blood Pressure Monitor | Home Air Purifier Display Module |
Use Scenario: Cuff pressure acquisition, oscillometric analysis, and 3-digit numeric LCD readout with low-battery warning. IC Role / Device Role / Timing Role: Signal processor capturing analog pressure transducer output (AN4–AN5), performing real-time filtering, and driving 3-digit LCD using 1/3 bias and 1/3 duty. Use Value: On-chip 8-bit A-D converter with internal reference ensures ±1 LSB accuracy without external op-amps or voltage references. |
Use Scenario: PM2.5 sensor data aggregation, fan speed control via PWM, and 12-segment air quality indicator display. IC Role / Device Role / Timing Role: Central coordinator reading I²C sensor (via bit-banged SCLK/RXD), generating fan PWM on TOUT (P56), and refreshing 12-segment bar graph via SEG0–SEG11. Use Value: Programmable I/O with software pull-ups enables direct connection to I²C sensors and push-button keys - no external bus buffers required. |
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#30 | RL78/G13 core; 32 KB flash, 2.5 KB RAM; built-in LIN transceiver; 64-pin LQFP. | Targets automotive body electronics; lacks integrated LCD driver and dedicated segment outputs. | Select when LIN bus communication is required and LCD drive is handled externally. |
| HD64F3687FP | H8/300H core; 64 KB ROM, 2 KB RAM; no native LCD controller; 80-pin PQFP. | Designed for industrial HMI with external graphics controllers; higher code density but no segment drive capability. | Choose for legacy H8 toolchain compatibility where display is driven by external ASIC or FPGA. |
Compared with R5F100PLAFB#30 and HD64F3687FP, the M38227ECHP#U1 uniquely combines 48 KB ROM, 1024-byte RAM, and full LCD segment/common drive in a single 80-pin QFP - making it optimal for cost-sensitive, display-centric consumer appliances where external display ICs must be avoided.
Availability
M38227ECHP#U1 is available at Aetrix Electronics and suitable for refrigerator control panels, smart microwave ovens, portable medical monitors, and home air purifier display modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M38227ECHP#U1 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 formed from the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial, automotive, and consumer markets.
The M38227ECHP#U1 belongs to the 3822 Group - a family of 8-bit microcontrollers engineered specifically for cost-effective, low-power embedded display applications in household appliances and portable electronics.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for the M38227ECHP#U1?
The M38227ECHP#U1 achieves a minimum instruction execution time of 0.5 µs at 8 MHz, requiring a supply voltage of 4.0–5.5 V in high-speed mode. In extended temperature versions like the M38227ECHP#U1, full operation is guaranteed from 2.0 V to 5.5 V across –40°C to +85°C, enabling flexible power architecture design.
Does the M38227ECHP#U1 support true UART communication or only clock-synchronized serial I/O?
The M38227ECHP#U1 supports both UART (asynchronous) and clock-synchronized serial modes via the same hardware block. Pins P44 (RXD) and P45 (TXD) operate in UART mode by default, allowing standard RS-232/RS-485 interface with appropriate level shifting - confirmed in the functional block diagram and pin description tables.
How many LCD segments and commons can the M38227ECHP#U1 drive simultaneously, and what bias/duty configurations are supported?
The M38227ECHP#U1 drives up to 32 segments (SEG0–SEG31) and 4 commons (COM0–COM3), supporting LCD bias ratios of 1/2 or 1/3 and duty cycles of 1/2, 1/3, or 1/4. COM2 and COM3 are disabled automatically in 1/2-duty mode, while COM3 is unused in 1/3-duty mode - all configured via internal control registers.
Is the M38227ECHP#U1 pin-compatible with other members of the 3822 Group, such as M38224M6HXXXHP?
Yes - the M38227ECHP#U1 uses the 80P6Q-A package (0.5 mm pitch QFP), matching the pinout of all HP-suffixed 3822 Group variants including M38224M6HXXXHP. Pin functions (e.g., XIN, COM0, AN0, P44) are identical across the group, enabling footprint reuse across ROM/RAM variants.
What is the user-accessible ROM size in the M38227ECHP#U1, and are there reserved areas?
The M38227ECHP#U1 contains 48 KB of Mask ROM, with 49022 bytes available for user code and data. The first 128 bytes and last 2 bytes are reserved by the manufacturer for boot vector and checksum storage - these regions must not be overwritten during firmware development.
M38227ECHP#U1 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:
M38227ECHP#U1 FAQ
1.How can I place an order for M38227ECHP#U1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M38227ECHP#U1 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 M38227ECHP#U1 reliable?
The price and inventory of M38227ECHP#U1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38227ECHP#U1 is usually 5 days.
3.What payment methods are accepted for M38227ECHP#U1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38227ECHP#U1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38227ECHP#U1?
M38227ECHP#U1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38227ECHP#U1 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 M38227ECHP#U1?
For technical support, including M38227ECHP#U1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38227ECHP#U1 requirements.
6.How does Aetrix verify that M38227ECHP#U1 is sourced from the original manufacturer or authorized distributors?
All M38227ECHP#U1 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 M38227ECHP#U1 meets industry standards.
7.What is the process for return or replacement of M38227ECHP#U1?
All M38227ECHP#U1 units undergo pre-shipment inspection (PSI). If there is an issue with M38227ECHP#U1, 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 M38227ECHP#U1 part is unused and in its original packaging.
Return procedure for M38227ECHP#U1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M38227ECHP#U1 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
