Infineon Technologies CY9AF312KQN-G-AVE2

Overview

CY9AF312KQN-G-AVE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 128 KB MainFlash, 32 KB WorkFlash, 16 KB SRAM (8 KB SRAM0 + 8 KB SRAM1), USB 2.0 Full-Speed device/host interface, and integrated motor control peripherals including 8-channel 12-bit ADC (1.0 μs conversion @5 V), QPRC, and multi-function timers. It targets embedded motor control systems requiring real-time response, code security, and low-power operation down to Deep stand-by RTC mode.

For engineers reviewing the CY9AF312KQN-G-AVE2 datasheet, CY9AF312KQN-G-AVE2 pinout, CY9AF312KQN-G-AVE2 application, or CY9AF312KQN-G-AVE2 equivalent, key selection criteria include USB dual-role capability, 40 MHz max CPU frequency, 2.7–5.5 V supply range, LIN 2.1 support, and hardware CRC acceleration for data integrity in industrial and automotive subsystems.

Technical Context

The CY9AF312KQN-G-AVE2 implements an ARM Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels, plus a 24-bit SysTick timer for RTOS scheduling. Its clock system integrates five sources - main oscillator (4–48 MHz), sub-clock (32.768 kHz), high-speed/low-speed internal CR oscillators, and main PLL - with Clock Supervisor (CSV) for external clock failure detection.

Peripheral architecture includes dual independent Flash banks (MainFlash + WorkFlash) with shared code protection, two SRAM banks (SRAM0 on I/D-code bus, SRAM1 on system bus), and a DMA controller with 8 channels supporting byte/half-word/word transfers across 4 GB address space. USB PHY supports full-speed device/host modes with up to 6 endpoints and double-buffering on EP1–EP5.

Key Specifications

Pinout & Package

The CY9AF312KQN-G-AVE2 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad, rated for industrial temperature range (–40°C to +85°C). Pin functions are fully relocatable via port relocation registers, enabling flexible PCB layout and peripheral remapping without hardware changes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F103VCT6 and RL78/F13, the CY9AF312KQN-G-AVE2 uniquely combines USB dual-role capability, LIN 2.1 compliance, QPRC, and hardware CRC in a single chip - reducing BOM count and firmware complexity for motor-driven IoT gateways and automotive subsystems.

Availability

CY9AF312KQN-G-AVE2 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, smart appliance controllers, and energy monitoring gateways requiring stable component supply, long-term lifecycle support, and qualified industrial-grade reliability.

Supply support for CY9AF312KQN-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 is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and embedded controllers with emphasis on safety, efficiency, and system integration.

The CY9AF312KQN-G-AVE2 belongs to the FM3 family of 32-bit microcontrollers designed specifically for cost-sensitive, real-time embedded applications in motor control, industrial automation, and automotive body electronics - emphasizing peripheral integration, low-power flexibility, and functional safety readiness.

FAQ

What is the maximum operating frequency of the CY9AF312KQN-G-AVE2?

The CY9AF312KQN-G-AVE2 operates at up to 40 MHz using its ARM Cortex-M3 core. This frequency is achieved when the main clock (4–48 MHz) is selected directly or multiplied via the main PLL. The core maintains zero-wait-state execution from on-chip Flash at this speed, ensuring deterministic real-time performance for motor control and communication tasks.

Does the CY9AF312KQN-G-AVE2 support USB host functionality?

Yes, the CY9AF312KQN-G-AVE2 supports full USB 2.0 Full-Speed host mode, including automatic device connect/disconnect detection, IN/OUT token handshake, and up to 256-byte packet length. It supports bulk, interrupt, and isochronous transfers, making it suitable for connecting USB HID devices, flash drives, or diagnostic tools without external USB host controllers.

How does the port relocation feature work in practice?

The port relocation function uses dedicated register sets to assign peripheral functions (e.g., UART0_TX, I²C0_SCL, CSIO0_MOSI) to any of several GPIO pin groups. This is configured at runtime via memory-mapped registers, allowing dynamic reassignment without changing hardware layout - critical for design reuse, ECO implementation, and multi-variant product families sharing one PCB.

Is the CY9AF312KQN-G-AVE2 qualified for automotive applications?

The CY9AF312KQN-G-AVE2 is specified for industrial temperature range (–40°C to +85°C) and features automotive-relevant peripherals including LIN 2.1, CRC acceleration, LVD staging, and clock supervision. While not AEC-Q100 certified out-of-box, it is widely deployed in automotive body electronics where qualification is completed at system level per OEM requirements.