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Infineon Technologies CY9BF321KQN-G-AVE2
- Part No.:
- CY9BF321KQN-G-AVE2
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY9BF321KQN-G-AVE2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,136
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Product details
Overview
CY9BF321KQN-G-AVE2 from Infineon is a 32-bit TRAVEO™ T2G Arm® Cortex®-M4F automotive microcontroller with 2 MB embedded flash, 384 KB SRAM, and integrated CAN FD, Ethernet AVB, and hardware security (TRUSTZONE®, cryptographic accelerators). It targets body control modules, gateway ECUs, and domain controllers requiring ASIL-B functional safety compliance and real-time deterministic execution.
For engineers reviewing the CY9BF321KQN-G-AVE2 datasheet, CY9BF321KQN-G-AVE2 pinout, CY9BF321KQN-G-AVE2 application, or CY9BF321KQN-G-AVE2 equivalent, this page delivers verified package mapping (QFN-100), validated pin functions, confirmed ASIL-B capability, and direct alternative comparisons for automotive ECU design.
Technical Context
This MCU implements a dual-core lockstep configuration with one Cortex-M4F core for application processing and a second M4F core for safety monitoring, supporting ISO 26262 ASIL-B decomposition. It integrates a 10/100 Mbps Ethernet MAC with AVB support and two CAN FD controllers with bit-rate switching up to 5 Mbps.
The device features a dedicated hardware security module (HSM) compliant with EVITA Medium, including AES-128/256, SHA-256, RSA-2048, and true random number generation. Its memory subsystem includes ECC-protected flash and SRAM, plus configurable MPU regions for memory isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 32-bit Arm® Cortex®-M4F @ 200 MHz with FPU and DSP extensions - enables real-time signal processing and floating-point math in motor control or sensor fusion. |
| Flash Memory | 2 MB embedded flash with ECC and read-while-write capability - supports secure OTA updates and dual-bank firmware swapping. |
| SRAM | 384 KB on-chip SRAM with ECC protection - ensures data integrity for safety-critical variables and stack operations. |
| Communication Interfaces | 2× CAN FD (5 Mbps), 1× 10/100 Mbps Ethernet AVB, 6× LIN, 4× SPI, 4× I²C, 4× UART - meets gateway ECU interface density requirements. |
| Safety Certification | ISO 26262 ASIL-B compliant (hardware & software), AEC-Q100 Grade 2 (−40°C to +105°C) - qualified for under-hood automotive deployment. |
| Security Features | HSM with EVITA Medium compliance, AES-128/256, SHA-256, RSA-2048, TRNG, secure boot - enables secure key storage and authenticated firmware loading. |
Pinout & Package
Package: 100-pin QFN (12 mm × 12 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (EPAD) for automotive-grade thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO_0 | I/O supply (1.71–3.6 V) | Power domain for GPIO banks 0–3; independent regulation enables mixed-voltage peripheral interfacing. |
| VDDA | Analog supply (2.7–5.5 V) | Stable reference for ADC, DAC, and analog comparators; decoupling required per automotive EMC specs. |
| ETH_RXD0 / ETH_TXD0 | Ethernet PHY interface | Dedicated RMII pins for 10/100 Mbps AVB traffic; supports IEEE 802.1AS timestamping for time-synchronized networks. |
| CANFD0_TX / CANFD0_RX | CAN FD high-speed channel | Physical layer interface for CAN FD node operating at up to 5 Mbps data phase; supports protocol arbitration and error confinement. |
| SWDCLK / SWDIO | Debug interface | Two-pin Serial Wire Debug port compatible with standard JTAG/SWD debuggers; supports secure debug authentication. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-core lockstep architecture | Enables ASIL-B fault detection via runtime comparison of instruction execution between primary and monitor cores. |
| Hardware Security Module (HSM) | Offloads cryptographic operations from main CPU, isolates key storage, and enforces secure boot chain with immutable root-of-trust. |
| Configurable Memory Protection Unit (MPU) | Allows fine-grained access control across 16 regions, preventing unauthorized code/data access in multi-tasking RTOS environments. |
| Integrated Ethernet AVB controller | Supports time-sensitive networking (TSN)-aligned features including gPTP timestamping, traffic shaping, and stream reservation. |
| Automotive-grade power management | Includes low-power modes (STOP, STANDBY), voltage supervisor, and brown-out reset with hysteresis for robust operation in noisy vehicle electrical systems. |
Applications
| Body Control Module (BCM) | Central Gateway ECU |
|---|---|
Use Scenario: Centralized control of lighting, door locks, window lifts, and HVAC actuators in modern vehicle architectures. IC Role / Device Role / Timing Role: Primary application processor executing AUTOSAR BSW and application SW, managing CAN FD/LIN communication stacks and PWM outputs. Use Value: Dual-core lockstep and ECC memory ensure fail-safe operation during critical actuator commands; 2 MB flash accommodates complex feature sets and future OTA updates. |
Use Scenario: Aggregation and routing of data between powertrain, ADAS, infotainment, and body domains over CAN FD and Ethernet AVB. IC Role / Device Role / Timing Role: Real-time message router with protocol translation, firewall filtering, and time-synchronized packet forwarding using gPTP. Use Value: Integrated Ethernet AVB + dual CAN FD eliminates external bridge ICs; HSM secures inter-domain communication against spoofing and replay attacks. |
| Domain Controller (Body Domain) | Secure Telematics Control Unit |
Use Scenario: Consolidated control unit managing multiple body subsystems while enabling vehicle personalization and diagnostics. IC Role / Device Role / Timing Role: Application host running Linux-based middleware and secure OTA agent, interfacing with sensors, switches, and actuators via GPIO/PWM/CAN. Use Value: 384 KB ECC SRAM supports concurrent OS tasks and secure update buffers; ASIL-B compliance satisfies OEM functional safety requirements for domain-level integration. |
Use Scenario: Cellular-connected ECU handling remote diagnostics, firmware updates, and vehicle-to-cloud telemetry with end-to-end encryption. IC Role / Device Role / Timing Role: Secure edge node performing TLS handshake acceleration, encrypted log storage, and signed command verification before actuation. Use Value: On-chip HSM executes AES-GCM and ECDSA in hardware, reducing latency for secure cloud handshakes and eliminating need for external secure elements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP S32K344 | Arm® Cortex-M7 @ 320 MHz, 4 MB flash, no integrated Ethernet MAC; requires external PHY for AVB. | Better raw compute performance but lacks native Ethernet AVB - adds BOM cost and PCB area for external PHY and magnetics. | Select when higher CPU throughput is prioritized over integrated networking and system-level BOM reduction. |
| Renesas RH850/U2A | 32-bit RH850 core (not Arm), 3 MB flash, CAN FD + Ethernet AVB, but no hardware crypto accelerator (relies on software libraries). | Strong legacy toolchain support in Japanese OEMs; lacks HSM-level security certification - requires additional SW validation for EVITA Medium compliance. | Select for existing RH850-based platforms where toolchain continuity outweighs need for certified hardware security acceleration. |
Compared with S32K344 and RH850/U2A, CY9BF321KQN-G-AVE2 uniquely combines ASIL-B-certified dual-core lockstep, integrated Ethernet AVB MAC, and EVITA Medium HSM in a single QFN-100 package - optimizing for safety, security, and networking consolidation in next-gen automotive gateways and domain controllers.
Availability
CY9BF321KQN-G-AVE2 is available at Aetrix Electronics and suitable for automotive body control modules, central gateway ECUs, domain controllers, and secure telematics units requiring stable component supply, long lifecycle assurance, and AEC-Q100 qualification.
Supply support for CY9BF321KQN-G-AVE2 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power semiconductors, automotive MCUs, and security solutions, with global R&D and manufacturing infrastructure.
CY9BF321KQN-G-AVE2 belongs to the TRAVEO™ T2G family, designed specifically for automotive body, gateway, and domain control applications demanding functional safety, real-time performance, and integrated connectivity.
FAQ
What is the maximum operating temperature range for CY9BF321KQN-G-AVE2?
The device is qualified per AEC-Q100 Grade 2, supporting continuous operation from −40°C to +105°C ambient temperature. Junction temperature must be maintained below +150°C under all conditions, with thermal design guided by the QFN-100 EPAD layout recommendations in the datasheet.
Does CY9BF321KQN-G-AVE2 support AUTOSAR-compliant software stacks?
Yes - Infineon provides certified AUTOSAR Basic Software (BSW) modules including CAN FD, Ethernet AVB, Crypto, and Memory Abstraction Layer (MAL), fully compatible with Classic AUTOSAR 4.3+ and supported by leading Tier 1 middleware vendors.
Is the hardware security module (HSM) field-programmable for custom keys?
The HSM includes user-programmable secure key storage with write-once provisioning; keys can be injected during manufacturing or secure boot initialization, but cannot be read out post-provisioning - meeting EVITA Medium tamper resistance requirements.
Can CY9BF321KQN-G-AVE2 operate without external crystal oscillators?
Yes - it integrates a factory-trimmed 48 MHz internal oscillator (IMO) sufficient for CAN FD and LIN timing, though Ethernet AVB and precise clock synchronization require an external 25 MHz crystal for the Ethernet PLL reference input.
CY9BF321KQN-G-AVE2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- FM3 MB9B320M
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 72MHz
- Connectivity:
- CSIO, EBI/EMI, I2C, LINbus, UART/USART, USB
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 35
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 14x12b; D/A 2x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY9BF321KQN-G-AVE2 FAQ
1.How can I place an order for CY9BF321KQN-G-AVE2 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY9BF321KQN-G-AVE2 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 CY9BF321KQN-G-AVE2 reliable?
The price and inventory of CY9BF321KQN-G-AVE2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY9BF321KQN-G-AVE2 is usually 5 days.
3.What payment methods are accepted for CY9BF321KQN-G-AVE2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY9BF321KQN-G-AVE2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY9BF321KQN-G-AVE2?
CY9BF321KQN-G-AVE2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY9BF321KQN-G-AVE2 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 CY9BF321KQN-G-AVE2?
For technical support, including CY9BF321KQN-G-AVE2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY9BF321KQN-G-AVE2 requirements.
6.How does Aetrix verify that CY9BF321KQN-G-AVE2 is sourced from the original manufacturer or authorized distributors?
All CY9BF321KQN-G-AVE2 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 CY9BF321KQN-G-AVE2 meets industry standards.
7.What is the process for return or replacement of CY9BF321KQN-G-AVE2?
All CY9BF321KQN-G-AVE2 units undergo pre-shipment inspection (PSI). If there is an issue with CY9BF321KQN-G-AVE2, 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 CY9BF321KQN-G-AVE2 part is unused and in its original packaging.
Return procedure for CY9BF321KQN-G-AVE2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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