Infineon Technologies CY9AFB42LBPMC-G-JNE2

Overview

CY9AFB42LBPMC-G-JNE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 256 KB dual-bank Flash, 32 KB SRAM, USB 2.0 Full-Speed device/host interface, 12-bit ADC (24 channels), and LCD controller (40×8 SEG/COM). It operates up to 40 MHz, supports six low-power modes, and targets embedded control in industrial HMI, metering, and appliance panels.

For engineers reviewing the CY9AFB42LBPMC-G-JNE2 datasheet, CY9AFB42LBPMC-G-JNE2 pinout, CY9AFB42LBPMC-G-JNE2 application, or CY9AFB42LBPMC-G-JNE2 equivalent, key selection criteria include dual-bank Flash for seamless firmware updates, integrated LCDC with internal bias resistors, USB host/device capability without external PHY, and 5 V-tolerant GPIOs on selected pins.

Technical Context

This MCU implements the ARM Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels. Its memory subsystem includes two independent SRAM banks (SRAM0/SRAM1) connected to I-code/D-code and system buses respectively, enabling concurrent CPU and DMA access.

The peripheral set integrates a 24-channel 12-bit SAR ADC with scanning and priority conversion modes, an 8-channel DMA controller with burst/block/demand transfer support, and a dedicated CRC accelerator for CCITT CRC16 and IEEE-802.3 CRC32 - reducing software overhead for data integrity checks in communication and storage applications.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 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 STM32F103RCT6 and RA4M1, CY9AFB42LBPMC-G-JNE2 uniquely combines USB host/device, dual-bank Flash, integrated LCDC, and HDMI-CEC in a single chip - reducing component count and PCB area in appliance and metering designs requiring multiple communication and display interfaces.

Availability

CY9AFB42LBPMC-G-JNE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, home appliance control boards, and white goods remote interfaces requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFB42LBPMC-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 German semiconductor leader specializing in power management, automotive MCUs, and security solutions, with global manufacturing and R&D infrastructure.

This part belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, low-power embedded control applications requiring rich analog and human-interface peripherals.

FAQ

Does CY9AFB42LBPMC-G-JNE2 support USB host mode with external device enumeration?

Yes. The integrated USB host controller supports Full/Low-speed devices, automatic connection/disconnection detection, IN/OUT token handshake, and up to 256-byte packet length. It enumerates standard HID, mass storage, and CDC-class peripherals without external PHY or hub IC.

What is the maximum operating frequency of the main PLL and its input requirements?

The main PLL accepts 4–48 MHz input from XTAL1/XTAL2 or external clock, and generates up to 40 MHz system clock. It requires external 12–24 pF load capacitors for crystal operation and supports spread-spectrum modulation to reduce EMI in noise-sensitive environments.

Can the LCDC drive a 40×8 segment display without external bias resistors?

Yes. The LCDC includes an internal dividing resistor network connected to VV0–VV4 pins, allowing direct bias voltage generation for static or 4/8-COM multiplexed displays. No external resistors are needed unless custom contrast or voltage scaling is required.

How does the dual-bank Flash enable firmware updates without system interruption?

While the upper bank executes active code, the lower bank (32 KB work area) can be erased and reprogrammed. Bootloader logic switches execution to the updated bank after validation, achieving zero-downtime field updates - confirmed in FM3 Peripheral Manual TYPE6 configuration.