Infineon Technologies CY9BF121JPMC-G-JNE2

Overview

CY9BF121JPMC-G-JNE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 64 KB on-chip Flash, 8 KB SRAM (4 KB SRAM0 + 4 KB SRAM1), and integrated peripherals including UART/CSIO/I²C/LIN interfaces, 12-bit ADC (1.0 μs conversion @5 V), eight base timers, RTC, dual watchdogs, and SW-DP debug support. It operates at up to 72 MHz, supports 2.7–5.5 V supply, and targets low-power embedded motor control and industrial sensing applications.

For engineers reviewing the CY9BF121JPMC-G-JNE2 datasheet, CY9BF121JPMC-G-JNE2 pinout, CY9BF121JPMC-G-JNE2 application, or CY9BF121JPMC-G-JNE2 equivalent, key selection criteria include its dual-watchdog architecture (hardware + software), 32-pin LQFP package with 23 GPIOs (some 5V-tolerant), LIN 2.1 compliance, and dedicated A/D activation compare channel for deterministic sensor sampling.

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 scheduling. Its memory subsystem separates instruction/data access (SRAM0 on I-code/D-code buses) from system bus (SRAM1), enabling concurrent CPU and DMA operation.

The peripheral set includes four-channel DMA with 32-bit addressing, multi-function serial interfaces configurable per channel as UART, CSIO, LIN, or I²C, and a quadrature position/revolution counter (QPRC) with 16-bit position/revolution counters and configurable AIN/BIN/ZIN edge detection - all optimized for real-time motion control feedback loops.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 × 7 mm, 0.8 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 RP2040, CY9BF121JPMC-G-JNE2 delivers LIN 2.1-native support, hardware QPRC, and dual watchdogs - making it uniquely suited for safety-conscious, protocol-specific automotive and industrial motion systems where peripheral integration reduces BOM count and firmware complexity.

Availability

CY9BF121JPMC-G-JNE2 is available at Aetrix Electronics and suitable for motor control systems, industrial sensor nodes, automotive body electronics, and smart actuator modules requiring stable component supply and long-term lifecycle support.

Supply support for CY9BF121JPMC-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 with strong industrial and automotive focus.

CY9BF121JPMC-G-JNE2 belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-optimized, low-power embedded control in automotive body electronics, industrial automation, and motor-driven equipment.

FAQ

What is the maximum operating frequency and core revision of CY9BF121JPMC-G-JNE2?

The CY9BF121JPMC-G-JNE2 operates at up to 72 MHz using the ARM Cortex-M3 processor core, revision r2p1. This revision includes hardware division support, Thumb-2 instruction set, and an integrated Nested Vectored Interrupt Controller (NVIC) with 48 peripheral interrupt lines and 16 priority levels - confirmed in the official Infineon FM3 Peripheral Manual and datasheet Rev. *D.

Does CY9BF121JPMC-G-JNE2 support LIN 2.1 communication natively?

Yes, CY9BF121JPMC-G-JNE2 includes a dedicated LIN interface compliant with LIN 2.1 specification. It supports both master and slave modes, programmable break field (13–16 bits) and delimiter (1–4 bits), and built-in error detection for parity, framing, and overrun - all implemented in hardware without CPU intervention, as documented in Section 5.3.3 of the CY9B120J Series datasheet.

What low-power modes are available and what is the lowest current consumption?

CY9BF121JPMC-G-JNE2 supports four low-power modes: Sleep, Timer, RTC, and Stop. In Stop mode with RTC active, typical current consumption is 1.2 μA (at VCC = 3.3 V, TA = 25 °C), as specified in Section 12.8 of the datasheet. The hardware watchdog remains active in all modes except RTC and Stop, ensuring robust fail-safe behavior during extended sleep periods.

Is the device qualified for automotive applications and what package type does it use?

CY9BF121JPMC-G-JNE2 is offered in a 32-pin LQFP package (7 × 7 mm, 0.8 mm pitch) and is part of Infineon's automotive-qualified FM3 product line. While the specific part number CY9BF121JPMC-G-JNE2 carries the "-JNE2" suffix indicating industrial grade, the underlying FM3 platform supports AEC-Q100 qualification - and this variant is widely deployed in automotive body control modules meeting ISO/TS 16949 manufacturing standards.