Infineon Technologies CY9AF312KPMC-G-JNCGE2

Overview

CY9AF312KPMC-G-JNCGE2 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 QPRC, multi-function timers, and LIN 2.1 support. It operates at up to 40 MHz and targets embedded motor control, industrial automation, and smart sensor nodes.

For engineers reviewing the CY9AF312KPMC-G-JNCGE2 datasheet, CY9AF312KPMC-G-JNCGE2 pinout, CY9AF312KPMC-G-JNCGE2 application, or CY9AF312KPMC-G-JNCGE2 equivalent, key selection criteria include USB dual-role capability, 12-bit ADC with 1.0 μs conversion time, 5V-tolerant GPIO count, RTC with leap-year support, and low-power modes down to Deep stand-by STOP.

Technical Context

This MCU 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 features two independent Flash banks (MainFlash and WorkFlash) with zero-wait-state operation and shared code protection, and dual-bus-connected SRAM banks optimized for instruction/data separation.

The peripheral set is purpose-built for real-time motion control: QPRC supports quadrature encoder position/revolution counting with configurable AIN/BIN/ZIN edge detection; multi-function timers provide PWM, PPG, dead-time insertion, and A/D activation triggers; and the LIN 2.1 module includes programmable break field (13–16 bit) and delimiter (1–4 bit) generation.

Key Specifications

Pinout & Package

The CY9AF312KPMC-G-JNCGE2 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. 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 STM32F303VCT6 and RA4M1, CY9AF312KPMC-G-JNCGE2 uniquely integrates LIN 2.1, USB dual-role, and QPRC in a single chip-reducing external component count by up to 7 devices in motor-driven automotive and industrial nodes.

Availability

CY9AF312KPMC-G-JNCGE2 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, smart sensor nodes, and programmable logic controller I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for CY9AF312KPMC-G-JNCGE2 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 MCUs, and security solutions with vertical integration from silicon to system-level software.

This device belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, real-time embedded control applications demanding integrated motor interfaces, robust communication stacks (LIN/USB), and ultra-low-power operation.

FAQ

What is the maximum operating frequency and supported clock sources?

The CY9AF312KPMC-G-JNCGE2 runs at up to 40 MHz using its ARM Cortex-M3 core. Clock sources include an external main oscillator (4–48 MHz), 32.768 kHz sub-clock for RTC, high-speed internal CR oscillator (4 MHz), low-speed internal CR oscillator (100 kHz), and a built-in Main PLL that multiplies the main clock for USB and system timing. All sources are dynamically switchable via software.

Does this MCU support USB host functionality, and what peripheral types can it enumerate?

Yes, it supports USB 2.0 Full-Speed and Low-Speed host mode with automatic device connect/disconnect detection, IN/OUT token handshake, and up to 256-byte packet length. It can enumerate standard USB class devices including HID keyboards/mice, CDC ACM modems, mass storage devices, and custom vendor-class peripherals - all managed through the on-chip USB host controller without external PHY.

How does the QPRC module handle encoder signal conditioning and error resilience?

The QPRC accepts AIN, BIN, and ZIN signals with configurable edge detection (rising/falling/both) and built-in digital filtering to suppress contact bounce or EMI-induced glitches. It provides 16-bit position and revolution counters with dual compare registers for index matching and limit detection, and supports up/down counting with overflow/underflow interrupts - enabling robust position tracking even under noisy industrial conditions.

What debug interfaces are supported, and is JTAG required for production programming?

It supports Serial Wire JTAG Debug Port (SWJ-DP) with both SWD and JTAG protocols. SWD uses only SWDIO and SWCLK pins (2-pin), making it ideal for production programming and debugging. JTAG is optional and not required; factory programming can be performed via SWD using standard tools like Segger J-Link or Infineon's DAPLink-compatible programmers.