Infineon Technologies CY9AFB42LBQN-G-AVE2

Overview

CY9AFB42LBQN-G-AVE2 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 CY9AFB42LBQN-G-AVE2 datasheet, CY9AFB42LBQN-G-AVE2 pinout, CY9AFB42LBQN-G-AVE2 application, or CY9AFB42LBQN-G-AVE2 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 selected pins.

Technical Context

This MCU implements an 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 includes two independent SRAM banks (SRAM0 on I/D bus, SRAM1 on system bus) enabling concurrent CPU and DMA access.

The peripheral set integrates a 8-channel DMA controller with 32-bit addressing, HDMI-CEC/remote receiver (2 channels), RTC with leap-year support, and Clock Supervision (CSV) that monitors external clock integrity using internal CR oscillators - critical for fail-safe operation in industrial environments.

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 STM32F103VCT6 and RA4M1, CY9AFB42LBQN-G-AVE2 uniquely combines USB host/device, integrated LCDC with bias, and HDMI-CEC in a single chip - reducing system-level component count and firmware complexity for appliance and metering designs requiring remote interoperability.

Availability

CY9AFB42LBQN-G-AVE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, home appliance control, and building automation sensors requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFB42LBQN-G-AVE2 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 manufacturer specializing in power management, automotive ICs, and embedded controllers, with global R&D and manufacturing infrastructure.

This part belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, low-power industrial and consumer embedded systems requiring integrated analog peripherals and human interface capabilities.

FAQ

Does CY9AFB42LBQN-G-AVE2 support USB host mode with external device enumeration?

Yes. The built-in USB host controller supports automatic detection of device connect/disconnect, IN/OUT token handshake processing, and full-speed (12 Mbps) enumeration of HID, mass storage, and CDC-class peripherals. It handles descriptor requests and endpoint configuration autonomously without CPU intervention beyond initial setup.

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 internal CR oscillators and generates up to 48 MHz output for USB timing and CPU clock. It requires external crystal load capacitance of 12–18 pF and supports spread-spectrum modulation to reduce EMI in noise-sensitive applications.

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

Dual-bank Flash allows one bank (e.g., upper 240 KB) to run active firmware while the other (lower 16 KB work area) receives new code via UART/USB. After verification, the boot vector is redirected to the updated bank during reset - achieving zero-downtime field upgrades without external memory or bootloader complexity.

Can the LCDC drive both static and multiplexed segment displays?

Yes. The LCDC supports 40 SEG × 8 COM configuration in either 8-COM or 4-COM mode, enabling direct drive of static segment displays (e.g., 7-segment digits) or multiplexed 1/4-bias displays. Internal dividing resistors and programmable VV0–VV4 pins eliminate external bias networks for standard LCD glass types.