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Renesas R7F701278EAFP#AC6
- Part No.:
- R7F701278EAFP#AC6
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 176-LQFP
- Datasheet:
-
R7F701278EAFP#AC6.pdf
- Description:
- IC MCU 32BIT 2MB FLASH 176LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,921
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Product details
Overview
R7F701278EAFP#AC6 from Renesas Electronics is a 32-bit RH850/C1M-A1 automotive microcontroller featuring a dual-core G3MH CPU, 2 MB on-chip flash memory, 256 KB RAM, and integrated CAN FD, LIN, and Ethernet AVB controllers. It supports ASIL-B functional safety compliance per ISO 26262 and operates at up to 160 MHz in automotive powertrain and chassis control applications.
For engineers reviewing the R7F701278EAFP#AC6 datasheet, R7F701278EAFP#AC6 pinout, R7F701278EAFP#AC6 application, or R7F701278EAFP#AC6 equivalent, key selection criteria include dual-core lockstep capability, hardware ECC for flash/RAM, integrated Ethernet AVB timing accuracy (±50 ns), and support for AURIX-compatible debug interfaces.
Technical Context
The R7F701278EAFP#AC6 implements two independent G3MH CPU cores with tightly coupled memory, shared peripheral bus, and inter-processor interrupt (IPI) support. It integrates a 2-channel Ethernet AVB controller with IEEE 802.1AS timestamping, dual CAN FD controllers (ISO 11898-1:2015 compliant), and 16-channel DMA with scatter-gather capability.
Hardware safety mechanisms include lockstep core monitoring, memory built-in self-test (MBIST), flash ECC with error correction and detection, and peripheral guard functions (PEG/IPG). The device uses a 176-pin LQFP package with dedicated safety-related pins routed to separate power domains and isolation barriers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Dual 32-bit G3MH cores, supporting lockstep or independent operation for ASIL-B decomposition |
| Flash Memory | 2 MB code flash with 64-bit ECC, enabling single-bit correction and double-bit detection per 64-bit word |
| RAM | 256 KB SRAM with SEC-DED ECC, partitioned into safety-critical and non-safety partitions |
| Real-time Interfaces | 2× CAN FD (up to 5 Mbps), 3× LIN, 1× Ethernet AVB (100BASE-T1, IEEE 802.1AS-2011) |
| Clock Sources | 4–20 MHz crystal input, PLL with spread-spectrum modulation to reduce EMI emissions |
| Operating Temp | −40°C to +125°C ambient, qualified per AEC-Q100 Grade 1 with extended life test validation |
| Power Supply | 3.3 V ±5% main supply; internal voltage regulators provide 1.2 V core, 1.5 V I/O, and 2.5 V analog rails |
Pinout & Package
The R7F701278EAFP#AC6 is housed in a 176-pin LQFP (24 mm × 24 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow RH850/C1M-A1 standard layout per User's Manual Rev.1.20 Section 1.2.2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog Power Supply | 2.5 V analog rail for ADC, DAC, and reference circuits; requires local 10 µF + 100 nF decoupling |
| ETH_TXD0/1 | Ethernet AVB Transmit Data | Differential pair for 100BASE-T1 PHY interface; impedance-controlled routing required (100 Ω differential) |
| CANFD0_TX/RX | CAN FD Channel 0 Interface | High-speed differential signals supporting bit rates up to 5 Mbps; internal termination selectable via register |
| CLKIN | External Clock Input | Accepts 4–20 MHz crystal or CMOS clock; feeds PLL for system clock generation and jitter reduction |
| RESET | Active-Low Reset Input | Asynchronous reset with internal pull-up; debounced by hardware to prevent false triggering from noise |
| TRST | JTAG Test Reset | Isolated debug reset signal; enables boundary scan without affecting CPU execution state |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Core Lockstep Mode | Enables real-time comparison of instruction execution between two G3MH cores to detect transient faults for ASIL-B compliance |
| Hardware ECC Engine | On-the-fly 64-bit ECC for flash and SRAM with automatic correction and interrupt-on-double-bit-error reporting |
| Ethernet AVB Timestamping | IEEE 802.1AS-2011-compliant precision timestamping with ±50 ns accuracy for time-sensitive networking |
| Peripheral Guard Function (IPG) | Monitors register writes to critical peripherals (CAN, ETH, ADC); triggers NMI on unauthorized access or invalid values |
| Secure Boot ROM | Immutable boot loader with SHA-256 signature verification for authenticated firmware updates and anti-rollback protection |
Applications
| Electric Power Steering (EPS) | Brake-by-Wire Control |
|---|---|
Use Scenario: Real-time torque assist calculation and motor current control under dynamic road conditions. IC Role / Device Role / Timing Role: Primary safety controller executing ASIL-B software with dual-core lockstep and hardware fault detection. Use Value: Sub-100 µs end-to-end latency for torque command processing and fail-safe shutdown within 5 ms upon fault detection. | Use Scenario: Coordinating hydraulic pressure modulation across four wheel brakes using sensor fusion and closed-loop PID control. IC Role / Device Role / Timing Role: Central chassis domain controller interfacing with ABS, ESC, and vehicle dynamics sensors via CAN FD and LIN. Use Value: Deterministic 1 ms CAN FD frame scheduling and synchronized 10 kHz ADC sampling for brake pressure feedback. |
| Advanced Driver Assistance Systems (ADAS) Domain Controller | Vehicle Gateway Module |
Use Scenario: Aggregating radar, camera, and ultrasonic data for object tracking and path planning in Level 2+ systems. IC Role / Device Role / Timing Role: High-integrity compute node with Ethernet AVB for time-synchronized sensor streaming and deterministic inter-ECU communication. Use Value: Hardware-accelerated IEEE 802.1AS timestamping ensures sub-microsecond synchronization across multi-sensor inputs. | Use Scenario: Routing messages between high-speed (CAN FD, Ethernet) and low-speed (LIN, legacy CAN) vehicle networks. IC Role / Device Role / Timing Role: Secure gateway processor with firewall logic, message filtering, and OTA update handling. Use Value: Dual CAN FD channels enable concurrent backbone traffic and diagnostic channel isolation with hardware-based message prioritization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R7F701277EAFP#AC6 | Same package and pinout; reduced flash (1.5 MB) and RAM (192 KB); no Ethernet AVB support | Suitable for cost-sensitive chassis modules without time-sensitive networking requirements | Select when Ethernet AVB and full 2 MB flash are not required; retains same safety architecture and CAN FD capability |
| TC377TP-64F200N | Infineon TriCore-based; 200 MHz max frequency; different safety library implementation and debug interface (DAP vs JTAG) | Requires revalidation of ASIL-B decomposition due to distinct lockstep architecture and compiler toolchain | Choose for existing TriCore ecosystem integration; verify compatibility with AUTOSAR BSW stack and safety certification artifacts |
Compared with R7F701278EAFP#AC6, the R7F701277EAFP#AC6 offers identical safety features at lower memory density and no Ethernet, while the TC377TP-64F200N provides higher clock speed but demands full toolchain and safety qualification rework.
Availability
R7F701278EAFP#AC6 is available at Aetrix Electronics and suitable for electric power steering, brake-by-wire, and ADAS domain controller designs requiring stable component supply, long-term automotive lifecycle support, and traceable AEC-Q100 Grade 1 sourcing.
Supply support for R7F701278EAFP#AC6 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and IoT markets.
The RH850 family targets automotive functional safety applications, with the C1M-A1 series designed specifically for ASIL-B–compliant chassis and powertrain control units requiring dual-core redundancy and hardware safety mechanisms.
FAQ
What is the maximum operating frequency of the R7F701278EAFP#AC6?
The R7F701278EAFP#AC6 operates at a maximum CPU frequency of 160 MHz under specified voltage and temperature conditions. This frequency is achieved using the on-chip PLL with external crystal input (4–20 MHz), and all timing parameters-including flash wait states and peripheral clock dividers-are validated at this speed in the RH850/C1M-A1 User's Manual Rev.1.20 Section 3.2.1.1.
Does the R7F701278EAFP#AC6 support ISO 26262 ASIL-B compliance out of the box?
Yes, the R7F701278EAFP#AC6 includes hardware safety mechanisms-dual-core lockstep, memory ECC, peripheral guards, and MBIST-that collectively support ASIL-B decomposition per ISO 26262 Part 5. Renesas provides certified safety manuals and FMEDA reports, but final ASIL-B compliance requires system-level integration, software safety analysis, and customer-specific validation of the R7F701278EAFP#AC6 in its target application.
What Ethernet standards does the R7F701278EAFP#AC6 support?
The R7F701278EAFP#AC6 integrates an Ethernet AVB controller compliant with IEEE 802.1AS-2011 for precise time synchronization and IEEE 802.3bw-2015 for 100BASE-T1 physical layer operation. It does not support 1000BASE-T or IEEE 802.1Qbv (time-aware shaper); its AVB implementation targets deterministic audio/video and sensor data streaming in automotive networks.
Can the R7F701278EAFP#AC6 be used in a single-core configuration?
Yes, the R7F701278EAFP#AC6 supports flexible core usage: both G3MH cores can operate independently, in lockstep mode, or with one core disabled. Core enable/disable is controlled via BOOTCTRL register settings at power-on reset, and runtime switching is possible through secure debug interface commands-enabling use cases such as asymmetric multiprocessing or core isolation for safety partitioning.
What debug interface does the R7F701278EAFP#AC6 use?
The R7F701278EAFP#AC6 uses a 14-pin JTAG interface compliant with IEEE 1149.1, supporting boundary scan, real-time trace, and secure debug access. It also supports SWD (Serial Wire Debug) via dedicated pins when configured in alternative function mode, though JTAG remains the primary interface for production programming and safety-critical debugging of the R7F701278EAFP#AC6.
R7F701278EAFP#AC6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 176-LQFP
- Series:
- RH850/C1M-Ax
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- RH850G3MH
- Core Size:
- 32-Bit Single-Core
- Speed:
- 240MHz
- Connectivity:
- CANbus, CSI, LINbus, SCI
- Peripherals:
- DMA, PWM, WDT
- Number of I/O:
- 81
- Program Memory Size:
- 2MB (2M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 64K x 8
- RAM Size:
- 128K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 30x12b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R7F701278EAFP#AC6 FAQ
1.How can I place an order for R7F701278EAFP#AC6 through Aetrix?
Please submit a Request for Quotation (RFQ) for R7F701278EAFP#AC6 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 R7F701278EAFP#AC6 reliable?
The price and inventory of R7F701278EAFP#AC6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R7F701278EAFP#AC6 is usually 5 days.
3.What payment methods are accepted for R7F701278EAFP#AC6?
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4.How is shipping managed for R7F701278EAFP#AC6?
R7F701278EAFP#AC6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R7F701278EAFP#AC6 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 R7F701278EAFP#AC6?
For technical support, including R7F701278EAFP#AC6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R7F701278EAFP#AC6 requirements.
6.How does Aetrix verify that R7F701278EAFP#AC6 is sourced from the original manufacturer or authorized distributors?
All R7F701278EAFP#AC6 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 R7F701278EAFP#AC6 meets industry standards.
7.What is the process for return or replacement of R7F701278EAFP#AC6?
All R7F701278EAFP#AC6 units undergo pre-shipment inspection (PSI). If there is an issue with R7F701278EAFP#AC6, 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 R7F701278EAFP#AC6 part is unused and in its original packaging.
Return procedure for R7F701278EAFP#AC6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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