Infineon Technologies CY9AF121KPMC1-G-JNE2

Overview

CY9AF121KPMC1-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 integrated LIN/UART/I²C/CSIO interfaces - deployed in motor control and industrial sensor nodes requiring deterministic real-time response.

For engineers reviewing the CY9AF121KPMC1-G-JNE2 datasheet, CY9AF121KPMC1-G-JNE2 pinout, CY9AF121KPMC1-G-JNE2 application, or CY9AF121KPMC1-G-JNE2 equivalent, key selection criteria include its dual watchdog timers (HW + SW), RTC with leap-year support, 5-stage low-voltage detection (LVD1/LVD2), and 51 GPIOs with port relocation in 64-pin LQFP package.

Technical Context

This MCU implements the ARM Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels. It integrates a 24-bit SysTick timer for OS task scheduling and uses a multi-source clock system including main PLL (up to 48 MHz), sub-clock (32.768 kHz), and dual CR oscillators (4 MHz / 100 kHz).

The peripheral set includes eight base timers (configurable as PWM/PPG/reload/PWC), three multi-function timers with input capture/output compare/waveform generation, and dedicated IGBT-mode functions: dead-time insertion, DC chopper output, and DTIF emergency stop interrupt - all synchronized to A/D conversion triggers.

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 32-bit ARM Cortex-M3 microcontroller applications.

Compared with STM32F103C8T6 and RA4M1, CY9AF121KPMC1-G-JNE2 uniquely combines LIN 2.1 compliance, IGBT-mode hardware acceleration, and RTC calendar functionality in a cost-optimized 64-pin LQFP - making it optimal for automotive body control and industrial motor drives where protocol integration and deterministic timing are critical.

Availability

CY9AF121KPMC1-G-JNE2 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart sensor nodes, and programmable power supplies requiring stable component supply and long-term lifecycle support.

Supply support for CY9AF121KPMC1-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.

This device belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, real-time embedded control applications in automotive, industrial, and consumer systems with integrated analog and communication peripherals.

FAQ

What is the maximum operating frequency and supported clock sources?

The CY9AF121KPMC1-G-JNE2 operates up to 40 MHz using its ARM Cortex-M3 core. Supported clock sources include two external oscillators (main clock 4–48 MHz, sub-clock 32.768 kHz), two built-in CR oscillators (4 MHz high-speed, 100 kHz low-speed), and a main PLL that can multiply input frequencies for higher system clocks.

Does this MCU support LIN 2.1 protocol natively, and what features are included?

Yes, it supports LIN 2.1 natively through its Multi-function Serial Interface (CSIO) configured as LIN. Features include master/slave mode, configurable break field (13–16 bits), break delimiter (1–4 bits), and full error detection (parity, framing, overrun). No external LIN transceiver is required for basic implementation.

How many analog-to-digital converter channels does it have, and what is their resolution and speed?

It includes an 8-channel, 12-bit successive approximation ADC with a minimum conversion time of 0.8 μs at 5 V supply. It supports scanning mode (16-step FIFO) and priority conversion (4-step FIFO), enabling flexible sampling sequences for multi-sensor systems without CPU intervention.

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

Four low-power modes are supported: Sleep (core stopped, peripherals active), Timer (core stopped, selected timers running), RTC (only RTC and LSI active), and Stop (all clocks halted except RTC oscillator). Wake-up sources include external interrupts, RTC alarm, and watchdog timeout - with typical Stop-mode current below 1.5 μA.