Infineon Technologies CY9AF312KPMC-G-JNE2

Overview

CY9AF312KPMC-G-JNE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller designed for embedded motor control and industrial automation. It operates at up to 40 MHz, integrates 128 KB MainFlash + 32 KB WorkFlash, 16 KB SRAM (8 KB SRAM0 + 8 KB SRAM1), USB 2.0 Full-Speed device/host interface, and dual 12-bit ADCs with 1.0 µs conversion time at 5 V.

For engineers reviewing the CY9AF312KPMC-G-JNE2 datasheet, CY9AF312KPMC-G-JNE2 pinout, CY9AF312KPMC-G-JNE2 application, or CY9AF312KPMC-G-JNE2 equivalent, key selection criteria include integrated motor control timers (PPG, PWM, DTIF), quadrature position/revolution counter (QPRC), LIN 2.1 support, RTC with leap-year handling, and dual watchdogs (hardware + software) for safety-critical operation.

Technical Context

The CY9AF312KPMC-G-JNE2 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 scheduling. Its clock system includes five sources - main oscillator (4–48 MHz), sub-clock (32.768 kHz), high-speed internal CR (4 MHz), low-speed internal CR (100 kHz), and programmable Main PLL - enabling dynamic switching between performance and low-power modes.

Peripheral integration targets real-time motion control: QPRC accepts AIN/BIN/ZIN encoder inputs with configurable edge detection; multi-function timers provide PWM, dead-time insertion, input capture, and A/D activation triggers; and the dual 12-bit ADCs support scanning and priority conversion with 16-step FIFO for scan mode and 4-step FIFO for priority mode.

Key Specifications

Pinout & Package

The CY9AF312KPMC-G-JNE2 is housed in a 64-pin LQFP package (10 mm × 10 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 STM32F303K8T6 and RL78/F13, the CY9AF312KPMC-G-JNE2 uniquely combines QPRC, LIN 2.1, USB host/device, and DTIF in a single chip - reducing BOM count and PCB area in motor-driven industrial controllers requiring encoder feedback and field firmware updates.

Availability

CY9AF312KPMC-G-JNE2 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, smart energy meters, and factory automation I/O controllers requiring stable component supply and long-term lifecycle support.

Supply support for CY9AF312KPMC-G-JNE2 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.

The CY9AF312KPMC-G-JNE2 belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, engineered specifically for cost-sensitive, high-reliability embedded control applications demanding integrated motor timing, analog sensing, and robust communication interfaces.

FAQ

What is the maximum operating frequency and supported voltage range for CY9AF312KPMC-G-JNE2?

The CY9AF312KPMC-G-JNE2 operates at up to 40 MHz with a core supply voltage range of 2.7 V to 5.5 V. Its USB I/O pins require 3.0–3.6 V when USB functionality is active, while GPIO operation remains compatible with the full 2.7–5.5 V range. This wide voltage tolerance supports direct interfacing with legacy 5 V sensors and actuators without level-shifting circuitry.

Does CY9AF312KPMC-G-JNE2 support in-system programming and secure firmware updates?

Yes. The device features dual-bank Flash architecture (128 KB MainFlash + 32 KB WorkFlash) with shared code protection, enabling safe over-the-air (OTA) updates. WorkFlash can be used for background firmware download while MainFlash executes active code, and the CRC accelerator verifies image integrity before swap. Security functions prevent unauthorized read-out of protected memory regions.

How does the Quadrature Position/Revolution Counter (QPRC) interface with external encoders?

The QPRC uses three dedicated pins - AIN, BIN, and ZIN - to accept differential or single-ended quadrature signals. Edge detection polarity (rising/falling) on each pin is independently configurable via register settings. The 16-bit position counter increments/decrements on A/B transitions, while ZIN resets the counter to zero on index pulse detection - essential for absolute position initialization in servo systems.

What low-power modes are available and how do they differ in wake-up capability?

Six low-power modes are supported: SLEEP (CPU stopped, peripherals active), TIMER (RTC running), RTC (RTC + 32.768 kHz clock only), STOP (all clocks halted except sub-clock), and two Deep stand-by modes retaining RTC or STOP state. Wake-up sources include external interrupts, RTC alarms, QPRC events, and USB activity. Deep stand-by RTC draws <1 µA and retains SRAM content, enabling battery-backed operation for years.