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Renesas R5F2L388CNFP#31
- Part No.:
- R5F2L388CNFP#31
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
R5F2L388CNFP#31.pdf
- Description:
- SD_R8C/LCD_015
- Quantity:
- Payment:
- Shipping:
Inventory:3,929
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Product details
Overview
R5F2L388CNFP#31 from Renesas Electronics is an 8-bit R8C/L38C Group microcontroller featuring the R8C CPU core, 64 KB flash program memory, 8 KB RAM, and integrated LCD drive control supporting up to 48 segment outputs and 8 common outputs. It operates at up to 20 MHz (50 ns min. instruction time), includes a 16×16-bit hardware multiplier, 10-bit ×16-channel ADC, dual 8-bit DACs, and supports -20°C to +85°C ambient temperature in an 80-pin LQFP package. It targets embedded control in appliance user interfaces with integrated display and analog sensing.
For engineers reviewing the R5F2L388CNFP#31 datasheet, R5F2L388CNFP#31 pinout, R5F2L388CNFP#31 application, or R5F2L388CNFP#31 equivalent, key selection criteria include its 80-pin LQFP-0.5 mm pitch package, 16-channel ADC with sweep mode, background operation (BGO) data flash, real-time clock (timer RE), and hardware LIN module using timer RA and UART0 - all confirmed for the R8C/L38C Group.
Technical Context
The R5F2L388CNFP#31 implements the R8C CPU core with 89 fundamental instructions and a dedicated 16×16→32-bit multiplier for efficient math-intensive tasks. Its system clock generation includes four independent circuits: XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - enabling flexible power-mode transitions between standard, wait, stop, and power-off modes.
Peripheral integration centers on mixed-signal control: Timer RD provides three-phase PWM with complementary output (6 pins), Timer RC offers 3-pin PWM, and the DTC supports 38 activation sources for autonomous data transfers. The LCD controller integrates voltage multiplier and regulator, supporting static, 1/2–1/4 duty, and 1/3 bias configurations with up to 48 segment outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 8-bit core with 89 instructions; enables compact code and deterministic timing for real-time appliance control. |
| Flash / RAM | 64 KB program flash + 1 KB ×4 data flash (BGO supported); 8 KB RAM - sufficient for UI logic, sensor processing, and display buffering. |
| ADC | 10-bit resolution ×16 channels with sample-and-hold and sweep mode - supports simultaneous multi-sensor monitoring (e.g., temp, voltage, current). |
| LCD Drive | Max. 8 COM / 48 SEG outputs; integrated voltage multiplier and regulator - eliminates external bias circuitry for segment displays. |
| Timers | Timer RD (16-bit ×2, 6-pin complementary PWM), Timer RC (16-bit, 3-pin PWM), Timer RE (real-time clock) - enables motor control, backlight dimming, and timekeeping. |
| Communication | UART0/1/2 (I²C-capable), SSU, hardware LIN (using UART0 + timer RA) - supports appliance subsystem interconnect and automotive-grade diagnostics. |
| Supply & Temp | VCC = 1.8–5.5 V; operating ambient: -20°C to +85°C (N version); ultra-low stop-mode current (2 µA) - suitable for battery-backed or energy-conscious designs. |
Pinout & Package
Package: PLQP0080KB-A - 80-pin LQFP, 0.50 mm pin pitch, 12 × 12 mm body, exposed pad (thermal enhancement). Pinout validated per Figure 1.11 (R01DS0095EJ0101, p.17) and Table 1.11–1.13.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | SEG0–SEG7 / AN4–AN9 | Segment outputs and analog inputs - shared I/O for display segments and front-end sensing. |
| P1_0–P1_3 | SEG8–SEG11 / AN12–AN15 | Additional segment outputs and ADC channels - extends display capability and analog monitoring. |
| P2_0–P2_7 | SEG16–SEG23 / KI0–KI7 | Segment outputs and key input pins - enables direct keypad scanning without external logic. |
| P3_0–P3_7 | SEG24–SEG31 / INT0–INT7 | Segment outputs and external interrupt sources - supports responsive UI event handling (button press, fault detection). |
| P4_0–P4_7 | SEG32–SEG39 / TXD1, RXD1, CLK1, TRCIOx | Segment outputs and serial interface signals - allows concurrent display driving and communication. |
| P6_0–P6_7 | SEG44–SEG51 / TRDIOA0–TRDIOD1 | High-number segment outputs and trace/debug I/O - supports full 48-segment display and debug visibility. |
| P7_0–P7_7 | COM0–COM7 / SEG52–SEG55 | Common outputs and extended COM/SEG mapping - enables 1/8-duty multiplexing and flexible display layout. |
| XIN / XOUT | Crystal oscillator input/output | Supports precision timing via external 20 MHz crystal - critical for accurate RTC and communication baud rates. |
| VL1–VL4 | LCD bias voltage supply pins | Accept internal or external bias voltages - configurable for 1/2, 1/3, or 1/4 bias ratios per display requirements. |
| CL1 / CL2 | LCD clock inputs | Drive LCD frame rate and timing - programmable via internal divider for optimal contrast and flicker suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) | Data flash erase/write during program execution - enables firmware updates and parameter logging without halting application. |
| Hardware LIN Module | Dedicated LIN 2.1 support using UART0 and timer RA - reduces CPU overhead for automotive HVAC or appliance network nodes. |
| Low-Power Modes | Wait (3.5 µA @ 32 kHz), stop (2 µA), power-off (0.02 µA) - extends battery life in portable or standby appliances. |
| Integrated Voltage Multiplier | On-chip LCD bias generation - eliminates external charge pumps and simplifies BOM for segment display systems. |
| Dual 8-bit DACs | DA0/DA1 on P13_0/P13_1 - provides analog control outputs for backlight brightness, audio volume, or actuator biasing. |
| 14-bit Watchdog Timer | Configurable reset start and prescaler - ensures robust recovery from software hangs in unattended consumer devices. |
Applications
| Microwave Oven Control Panel | Refrigerator Display & Sensor Hub |
|---|---|
|
Use Scenario: Real-time monitoring of keypad inputs, temperature sensors, and cooking timers while driving a 4-line segment LCD with backlight control. IC Role / Device Role / Timing Role: Central UI controller executing state machine logic, sampling 16 ADC channels (temp, door switch, humidity), generating PWM for backlight dimming, and updating LCD segments via integrated driver. Use Value: Single-chip solution replaces discrete MCU + LCD driver + DAC + LIN transceiver - reduces PCB area by >35% and eliminates 12+ external components. |
Use Scenario: Coordinating compressor control, defrost cycle timing, interior lighting, and multi-zone temperature sensing across freezer/fridge compartments. IC Role / Device Role / Timing Role: System manager running RTOS tasks, using Timer RE for precise 1-second intervals, Timer RD for 3-phase fan control, and LIN to communicate with main board. Use Value: Hardware LIN and 20 mA high-drive I/O ports enable direct solenoid/relay control - eliminates level-shifting buffers and reduces bill-of-materials cost. |
| Washing Machine User Interface | Audio Equipment Front Panel |
|
Use Scenario: Managing rotary encoder inputs, water-level pressure sensors, motor phase feedback, and segmented status display during wash/drain/spin cycles. IC Role / Device Role / Timing Role: Dedicated UI processor handling human-machine interaction, performing ADC sweeps every 10 ms, and updating 48-segment display with dynamic icons and progress bars. Use Value: 48-segment LCD support and BGO data flash allow persistent cycle history storage and firmware field upgrades - improves serviceability and feature longevity. |
Use Scenario: Driving LED bar graphs, rotary encoder interface, IR remote decoding, and analog volume control for stereo receivers or smart speakers. IC Role / Device Role / Timing Role: Front-panel controller using dual DACs for analog volume, UART2 for IR command parsing, and key input interrupts for tactile button response. Use Value: Integrated 10-bit ADC and DACs replace external converters - maintains 0.4% volume linearity while reducing component count and calibration effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit MCU applications with integrated LCD drivers.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2L38ACNFP | 96 KB flash, 10 KB RAM, same 80-pin LQFP package and peripheral set - no functional or pinout change. | Required when application firmware exceeds 64 KB or demands larger data buffers for logging or OTA updates. | Select R5F2L38ACNFP if future firmware growth or enhanced feature sets (e.g., BLE coexistence, advanced UI animations) are anticipated. |
| R5F2L368CNFP | 64 KB flash, 8 KB RAM, but only 64-pin LQFP (PLQP0064KB-A); 10-channel ADC, 32-segment LCD, fewer I/O (52 vs. 68). | Suitable for simpler UIs with ≤32 segments and <10 analog inputs - e.g., basic coffee makers or air purifiers. | Choose R5F2L368CNFP only when display complexity and sensor count are reduced, and PCB space constraints favor smaller package. |
Compared with R5F2L388CNFP#31, R5F2L38ACNFP offers headroom for firmware expansion without layout changes, while R5F2L368CNFP trades display/sensing capability for smaller footprint and lower I/O count - making it viable only in scaled-down implementations.
Availability
R5F2L388CNFP#31 is available at Aetrix Electronics and suitable for microwave oven control panels, refrigerator display hubs, washing machine UIs, audio equipment front panels, and other consumer appliance applications requiring stable component supply, long-term lifecycle support, and qualified industrial-grade MCU sourcing.
Supply support for R5F2L388CNFP#31 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 R8C/L38C Group is designed for cost-sensitive, display-rich consumer appliances requiring integrated LCD driving, analog sensing, and low-power operation - balancing performance, integration, and thermal efficiency in compact form factors.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for the R5F2L388CNFP#31?
The R5F2L388CNFP#31 supports a maximum operating frequency of 20 MHz at VCC = 2.7–5.5 V, delivering a minimum instruction execution time of 50 ns. At lower frequencies (e.g., 5 MHz), it operates down to VCC = 1.8 V, enabling compatibility with battery-powered or low-voltage subsystems while maintaining full peripheral functionality.
Does the R5F2L388CNFP#31 support background operation (BGO) for data flash writes?
Yes, the R5F2L388CNFP#31 includes background operation (BGO) for its 1 KB ×4 data flash blocks. This allows the CPU to execute application code concurrently with flash erase/write operations - essential for runtime parameter storage, firmware update staging, and logging without interrupting real-time UI or control tasks.
How many segment and common outputs does the integrated LCD controller support on the R5F2L388CNFP#31?
The R5F2L388CNFP#31's LCD controller supports up to 48 segment outputs and 8 common outputs, as confirmed for the R8C/L38C Group in Table 1.3 and Figure 1.7. This enables driving large alphanumeric or icon-based displays commonly used in premium home appliances without external segment drivers.
Is hardware LIN bus support built into the R5F2L388CNFP#31, and which peripherals enable it?
Yes, the R5F2L388CNFP#31 includes a dedicated hardware LIN 2.1 module that uses UART0 for serial framing and timer RA for baud rate generation and synchronization. This offloads LIN protocol handling from firmware, ensuring deterministic timing and reducing CPU utilization in appliance sub-system networks.
What low-power modes are available on the R5F2L388CNFP#31, and what are their typical current draws?
The R5F2L388CNFP#31 offers wait mode (3.5 µA @ 32 kHz), stop mode (2 µA), and power-off mode (0.02 µA), all measured at VCC = 3.0 V. These modes leverage the low-speed on-chip oscillator and selective peripheral gating - enabling multi-year battery life in standby or remote-control receiver applications.
R5F2L388CNFP#31 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-LQFP
- Series:
- R8C/Lx/38C
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- LCD, POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 68
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 16x10b; D/A 2x8b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F2L388CNFP#31 FAQ
1.How can I place an order for R5F2L388CNFP#31 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2L388CNFP#31 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 R5F2L388CNFP#31 reliable?
The price and inventory of R5F2L388CNFP#31 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2L388CNFP#31 is usually 5 days.
3.What payment methods are accepted for R5F2L388CNFP#31?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2L388CNFP#31 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2L388CNFP#31?
R5F2L388CNFP#31 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2L388CNFP#31 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 R5F2L388CNFP#31?
For technical support, including R5F2L388CNFP#31 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2L388CNFP#31 requirements.
6.How does Aetrix verify that R5F2L388CNFP#31 is sourced from the original manufacturer or authorized distributors?
All R5F2L388CNFP#31 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 R5F2L388CNFP#31 meets industry standards.
7.What is the process for return or replacement of R5F2L388CNFP#31?
All R5F2L388CNFP#31 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2L388CNFP#31, 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 R5F2L388CNFP#31 part is unused and in its original packaging.
Return procedure for R5F2L388CNFP#31:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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