Infineon Technologies CY9AF121KPMC-G-JNE2

Overview

CY9AF121KPMC-G-JNE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 64 KB on-chip Flash, 4 KB SRAM, 40 MHz max CPU frequency, 12-bit ADC (8 channels, 0.8 μs conversion), and 10-bit DAC (1 channel), designed for embedded motor control and industrial sensing applications.

For engineers reviewing the CY9AF121KPMC-G-JNE2 datasheet, CY9AF121KPMC-G-JNE2 pinout, CY9AF121KPMC-G-JNE2 application, or CY9AF121KPMC-G-JNE2 equivalent, key selection criteria include its dual watchdog timers (hardware + software), RTC with leap-year support, LIN 2.1 compliance, 5V-tolerant I/O ports, and FM3 family peripheral compatibility.

Technical Context

The device implements an ARM Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels, coupled with a 24-bit SysTick timer for OS task scheduling. It integrates a Main PLL for clock synthesis from 4–48 MHz external sources or internal 4 MHz CR oscillator.

Peripheral subsystems include four multi-function serial interfaces (UART/CSIO/LIN/I²C), eight base timers configurable as PWM/PPG/reload/PWC, and a dedicated IGBT-mode block with dead-time insertion, DTIF interrupt, and A/D activation triggers - all synchronized to motor control timing requirements.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6 and RL78/F13, CY9AF121KPMC-G-JNE2 uniquely combines LIN 2.1, leap-year RTC, IGBT-mode timers, and 5V-tolerant I/O in a single 64-pin package - reducing BOM count and layout complexity for automotive and industrial motor nodes.

Availability

CY9AF121KPMC-G-JNE2 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart sensor nodes, and energy monitoring systems requiring stable component supply across extended product lifecycles.

Supply support for CY9AF121KPMC-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, and industrial control solutions.

This device belongs to the FM3 family of 32-bit microcontrollers, engineered specifically for cost-optimized, low-power embedded control in motor drives, sensor hubs, and automotive sub-systems.

FAQ

What is the maximum operating frequency and core revision of CY9AF121KPMC-G-JNE2?

The CY9AF121KPMC-G-JNE2 operates at up to 40 MHz and implements the ARM Cortex-M3 processor revision r2p1. This core version includes the Nested Vectored Interrupt Controller (NVIC) with 48 peripheral interrupt lines and 16 programmable priority levels, ensuring deterministic response in real-time control loops.

Does this MCU support LIN communication, and what version is implemented?

Yes, CY9AF121KPMC-G-JNE2 supports LIN protocol Revision 2.1 natively through its multi-function serial interface. It provides master/slave operation, programmable break field (13–16 bits), break delimiter (1–4 bits), and full error detection including parity, framing, and overrun errors - meeting ISO 17987-4 compliance requirements.

What low-power modes are available, and which remain active during RTC operation?

The MCU supports four low-power modes: Sleep, Timer, RTC, and Stop. In RTC mode, the real-time clock continues counting from the 32.768 kHz sub-clock while most peripherals and CPU are halted. The hardware watchdog remains active in Sleep, Timer, and RTC modes but is disabled in Stop mode - enabling secure timekeeping with periodic wake-up capability.

Is the device pin-compatible with other FM3 series MCUs, and how is I/O flexibility achieved?

CY9AF121KPMC-G-JNE2 uses the 64-pin LQFP package common across multiple FM3 devices, but pin functions are not fully interchangeable due to peripheral mapping differences. I/O flexibility is achieved via built-in port relocate functionality, allowing assignment of UART, LIN, I²C, or timer outputs to multiple pin groups - simplifying PCB layout and enabling reuse of board designs across variants.