Infineon Technologies CY9AFB41LBQN-G-AVE2

Overview

CY9AFB41LBQN-G-AVE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 256 KB dual-bank Flash, 32 KB on-chip SRAM (16 KB SRAM0 + 16 KB SRAM1), USB 2.0 Full-Speed device/host interface, and integrated LCD controller supporting up to 40×8 segments - deployed in industrial HMI panels requiring low-power operation and real-time peripheral control.

For engineers reviewing the CY9AFB41LBQN-G-AVE2 datasheet, CY9AFB41LBQN-G-AVE2 pinout, CY9AFB41LBQN-G-AVE2 application, or CY9AFB41LBQN-G-AVE2 equivalent, key selection criteria include dual-bank Flash execution capability, USB host/device coexistence, 12-bit ADC with 2.0 µs conversion time, RTC with leap-year support, and 100-pin LQFP package with 5 V-tolerant I/O pins.

Technical Context

The CY9AFB41LBQN-G-AVE2 implements an ARM Cortex-M3 r2p1 core operating at up to 40 MHz with NVIC supporting 48 peripheral interrupts and 16 priority levels. It integrates dual-operation Flash enabling concurrent read/erase/write across upper (240 KB) and lower (16 KB main + 32 KB work) banks.

Peripherals include a full-featured USB 2.0 interface with built-in PLL, LCDC for segment-based displays, eight-channel DMA with independent bus access, and two 12-bit successive-approximation ADCs with FIFO and priority scanning - all coordinated via a clock system with five selectable sources including 32.768 kHz sub-clock and 4–48 MHz main clock.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, with 5 V-tolerant GPIO on selected pins (e.g., P00–P07, P10–P17, P20–P27).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit ARM Cortex-M3 microcontroller applications.

Compared with STM32F103VCT6 and RA4M1, CY9AFB41LBQN-G-AVE2 uniquely combines USB device/host, segment LCD driver, and dual-bank Flash in a single 100-pin LQFP package - reducing BOM count and PCB area for industrial display controllers.

Availability

CY9AFB41LBQN-G-AVE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, USB-capable gateways, and low-power remote sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFB41LBQN-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 MCUs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and IEC 61508.

The CY9AB40NB series - including CY9AFB41LBQN-G-AVE2 - was designed specifically for cost-sensitive, low-power embedded controllers in industrial human-machine interfaces and metering applications where integrated LCD, USB, and robust real-time peripherals reduce system complexity.

FAQ

Does CY9AFB41LBQN-G-AVE2 support USB host functionality without external components?

Yes. The part integrates a USB 2.0 Full/Low-Speed host controller with built-in PLL, eliminating the need for an external USB clock crystal. It supports automatic device connect/disconnect detection, IN/OUT token handshake, and up to 256-byte packet length - enabling direct connection to USB keyboards, mice, or flash drives.

What is the maximum operating frequency of the ARM Cortex-M3 core in CY9AFB41LBQN-G-AVE2?

The core operates at up to 40 MHz, derived from the main clock (4–48 MHz) via the Main PLL. This frequency is confirmed in the datasheet's AC characteristics section and applies across the full recommended operating voltage range of 1.65–3.6 V.

Can the on-chip LCD controller drive custom segment layouts beyond 40×8?

No. The LCDC supports exactly 40 segment outputs and 8 common outputs, configurable in 4-COM or 8-COM mode. It does not support dot-matrix or graphical displays; layout flexibility is limited to segment mapping within those fixed dimensions and internal bias resistor networks.

Is hardware flow control available on all UART channels of CY9AFB41LBQN-G-AVE2?

No. Hardware flow control (CTS/RTS) is supported only on UART channel 4, as explicitly stated in the datasheet. Channels 0–3 lack RTS/CTS signal support and require software handshaking or external logic for flow management.