Infineon Technologies CY9AFA42LBQN-G-AVE2

Overview

CY9AFA42LBQN-G-AVE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with dual-bank flash (240 KB + 16 KB), 32 KB on-chip SRAM (16 KB SRAM0 + 16 KB SRAM1), and integrated LCD controller supporting up to 40 SEG × 8 COM. It operates at up to 40 MHz, supports six low-power modes including Deep Standby RTC/Stop, and targets embedded control in industrial HMI and appliance panels.

For engineers reviewing the CY9AFA42LBQN-G-AVE2 datasheet, CY9AFA42LBQN-G-AVE2 pinout, CY9AFA42LBQN-G-AVE2 application, or CY9AFA42LBQN-G-AVE2 equivalent, key selection considerations include its dual-operation flash architecture, 24-channel 12-bit ADC with 2.0 µs conversion time, hardware watchdog clocked by 100 kHz CR oscillator, and absence of external bus interface and hardware flow control on UART ch.4 - confirmed per Rev. *D datasheet.

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 OS task scheduling. Its memory subsystem features independent I-code/D-code and system buses enabling concurrent CPU and DMA access to SRAM0 and SRAM1.

The peripheral set includes an LCD controller with internal bias resistors and blinking function, HDMI-CEC transceiver with automatic ACK generation, and CRC accelerator supporting CCITT CRC16 and IEEE-802.3 CRC32 - all operating within 1.65 V–3.6 V supply range (2.2 V–3.6 V when LCDC active).

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 32-bit ARM Cortex-M3 microcontroller applications.

Compared with CY9AFA42LBQN-G-AVE2, CY9AA40NB-LSI-TX removes LCDC/CEC to reduce cost and die size, while STM32F103VCT6 trades integrated display/remote control for higher clock speed and broader software support - both require external circuitry to replicate CY9AFA42LBQN-G-AVE2's HMI-focused integration.

Availability

CY9AFA42LBQN-G-AVE2 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI displays, remote control hubs, and smart energy meter UIs requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFA42LBQN-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 leader specializing in power management, automotive MCUs, and security solutions, with global manufacturing and R&D infrastructure.

The FM3 family - including CY9AFA42LBQN-G-AVE2 - was designed specifically for cost-sensitive, low-power embedded controllers in white goods, industrial HMIs, and consumer remote systems requiring integrated LCD and CEC functionality.

FAQ

Does CY9AFA42LBQN-G-AVE2 support external bus interface?

No. Per datasheet Rev. *D page 2, CY9AFA42LBQN-G-AVE2 explicitly does not support External Bus Interface - this feature is omitted in the FA42LB variant, unlike other members of the CY9AA40NB series such as FA40LB. Designers must rely on on-chip memory or serial interfaces for peripheral expansion.

What LCD configurations does the built-in LCDC support?

The LCDC supports up to 40 segment lines and 8 common lines, with selectable 4-COM or 8-COM drive modes. It includes internal voltage-dividing resistors and dedicated bias supply pins (VV0–VV4), enabling direct connection to passive-matrix LCDs without external bias circuitry - verified in Section 4.1 of the datasheet.

Is hardware flow control available on UART channels?

No. Hardware flow control (CTS/RTS) is unsupported on CY9AFA42LBQN-G-AVE2, as stated in the datasheet footnote on page 2: "CY9AFA41LB, FA42LB and FA44LB do not support Hardware Flow control." Only software-based flow control or application-layer handshaking is viable for UART communication.

What are the voltage requirements when using the LCD controller?

When LCDC is active, the supply voltage must be 2.2 V to 3.6 V - a stricter minimum than the general 1.65 V–3.6 V operating range. This ensures sufficient headroom for internal bias generation and stable segment driving, as specified in the "Recommended Operating Conditions" table on datasheet page 72.