Infineon Technologies CY9AFB42MBPMC1-G-JNE2

Overview

CY9AFB42MBPMC1-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). 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 CY9AFB42MBPMC1-G-JNE2 datasheet, CY9AFB42MBPMC1-G-JNE2 pinout, CY9AFB42MBPMC1-G-JNE2 application, or CY9AFB42MBPMC1-G-JNE2 equivalent, key selection criteria include dual-bank Flash for seamless firmware updates, integrated LCDC with internal bias resistors, USB host/device capability with double-buffered endpoints, and 5 V-tolerant GPIOs on select pins.

Technical Context

This MCU implements an 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, a 40-segment × 8-common LCD controller with built-in voltage dividers and blinking control, and a multi-function serial interface supporting UART/CSIO/I²C across eight channels - four with 16-step FIFOs.

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, CY9AFB42MBPMC1-G-JNE2 uniquely integrates LCDC, USB device/host, and dual-bank Flash in a single 100-pin LQFP - eliminating three external ICs in HMI and metering designs while maintaining ARM Cortex-M3 compatibility and toolchain continuity.

Availability

CY9AFB42MBPMC1-G-JNE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, home appliance controllers, and building automation sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFB42MBPMC1-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 integrated analog peripherals, human-machine interfaces, and USB connectivity.

FAQ

What is the maximum operating frequency and supported voltage range for CY9AFB42MBPMC1-G-JNE2?

The device operates at up to 40 MHz with a supply voltage range of 1.65 V to 3.6 V. When USB functionality is enabled, VCC must be maintained between 3.0 V and 3.6 V; for LCD operation, the valid range is 2.2 V to 3.6 V. These ranges are specified in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the official datasheet (002-05631 Rev. *D).

Does CY9AFB42MBPMC1-G-JNE2 support USB host mode without external components?

Yes - it integrates a full-speed USB 2.0 host controller with built-in PLL, automatic IN/OUT token handshake processing, and device connect/disconnect detection. No external PHY or transceiver is required; only standard USB series resistors and ESD protection diodes (if used) are needed on USBDP/USBDM lines.

How does the dual-bank Flash architecture improve firmware reliability?

Dual-bank Flash allows one bank (e.g., upper 240 KB) to execute code while the other (lower 16 KB work area) is erased and reprogrammed. This enables atomic firmware updates, rollback capability, and zero-downtime field upgrades - essential for industrial equipment where system availability is critical.

Can the integrated LCD controller drive both static and multiplexed displays?

Yes - the LCDC supports static, 2-, 3-, and 4-multiplex configurations with up to 40 segments and 8 commons. It provides programmable bias voltage generation via internal resistor ladders (VV0–VV4 pins), eliminating external bias networks and supporting direct drive of common LCD glass types used in appliances and meters.