Infineon Technologies CY9AF112KQN-G-AVE2

Overview

CY9AF112KQN-G-AVE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller optimized for motor control and embedded industrial applications. It operates at up to 40 MHz, integrates 128 KB MainFlash + 32 KB WorkFlash, 16 KB SRAM (8 KB SRAM0 + 8 KB SRAM1), and features dual 12-bit ADCs with 1.0 μs conversion time, LIN 2.1 support, and QPRC for encoder position sensing.

For engineers reviewing the CY9AF112KQN-G-AVE2 datasheet, CY9AF112KQN-G-AVE2 pinout, CY9AF112KQN-G-AVE2 application, or CY9AF112KQN-G-AVE2 equivalent, key selection criteria include its dual Flash architecture with code protection, 36 fast GPIOs (some 5 V tolerant), integrated motor control peripherals (PPG, DTIF, PWM), RTC with leap-year support, and dual watchdog timers with independent clock domains.

Technical Context

The CY9AF112KQN-G-AVE2 implements the ARM Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels, plus a 24-bit SysTick timer for RTOS integration. Its memory subsystem uses separate I-code/D-code buses for SRAM0 and a system bus for SRAM1, enabling concurrent CPU and DMA access.

Peripheral timing is tightly coupled to five clock sources: main oscillator (4–48 MHz), sub-clock (32.768 kHz), high-speed CR (4 MHz), low-speed CR (100 kHz), and main PLL - all dynamically switchable. Clock supervision (CSV) monitors external oscillator failure or frequency anomaly, triggering interrupt or reset.

Key Specifications

Pinout & Package

The CY9AF112KQN-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).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit motor control microcontroller applications.

Compared with STM32F303VCT6 and RA4M1, the CY9AF112KQN-G-AVE2 uniquely combines LIN 2.1 hardware protocol support, dual Flash with shared security, and QPRC with configurable encoder inputs - making it optimal for cost-sensitive, space-constrained motor control designs requiring certified automotive communication and robust firmware update mechanisms.

Availability

CY9AF112KQN-G-AVE2 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body controllers, smart power meters, and factory automation sensor hubs requiring stable component supply and long-term lifecycle support.

Supply support for CY9AF112KQN-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 German semiconductor leader specializing in power management, automotive MCUs, and industrial control solutions, with global manufacturing and R&D infrastructure.

The CY9AF112KQN-G-AVE2 belongs to the FM3 family of ARM Cortex-M3 microcontrollers, designed specifically for cost-effective, high-reliability embedded motor control and industrial automation applications with integrated analog and communication peripherals.

FAQ

What is the maximum operating frequency and supported voltage range?

The CY9AF112KQN-G-AVE2 operates at up to 40 MHz across a 2.7 V to 5.5 V supply range. Its internal PLL supports multiplication of main clock inputs (4–48 MHz) or high-speed internal CR (4 MHz) to achieve this frequency. The wide voltage range enables direct compatibility with both 3.3 V and 5 V industrial I/O standards without external level shifters.

Does this MCU support hardware LIN 2.1 communication without external transceivers?

Yes - the CY9AF112KQN-G-AVE2 includes a fully compliant LIN 2.1 controller with hardware break field generation (13–16 bit length), delimiter control (1–4 bit), and master/slave mode support. However, an external LIN transceiver (e.g., TLE7259-3GE) is still required for physical layer signaling on the bus.

How does the dual Flash architecture enhance firmware security and update reliability?

The 128 KB MainFlash and 32 KB WorkFlash share code protection features and support independent erase/write operations. This enables safe firmware updates via bank-swapping: new code is written to WorkFlash while MainFlash remains active, then verified and atomically switched - preventing bricking during power loss or corruption.

Can the QPRC module interface directly with standard incremental encoders?

Yes - the QPRC accepts AIN, BIN, and ZIN signals with configurable edge detection (rising/falling/both) and provides 16-bit position and revolution counters plus two 16-bit compare registers. It directly connects to industry-standard quadrature encoders (e.g., US Digital E4P, Broadcom HEDS-5500) without external logic or glue circuitry.