Infineon Technologies CY9AFB41NBBGL-GE1

Overview

CY9AFB41NBBGL-GE1 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 LCD controller supporting up to 40×8 segments. It operates at up to 40 MHz, supports six low-power modes including Deep Standby RTC, and integrates 24-channel 12-bit ADC with 2.0 μs conversion time. Used in industrial HMI panels requiring integrated display control and USB connectivity.

For engineers reviewing the CY9AFB41NBBGL-GE1 datasheet, CY9AFB41NBBGL-GE1 pinout, CY9AFB41NBBGL-GE1 application, or CY9AFB41NBBGL-GE1 equivalent, key selection criteria include dual-bank Flash for seamless firmware updates, USB device/host coexistence, LCD bias voltage generation (VV0–VV4), 32.768 kHz RTC clock support, and 5 V-tolerant GPIO pins confirmed in Pin Assignment tables.

Technical Context

The CY9AFB41NBBGL-GE1 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 features dual-operation Flash enabling concurrent read/erase/write across upper (240 KB) and lower (16 KB main + 32 KB work) banks, and two independent SRAM blocks (SRAM0 on I/D-code bus, SRAM1 on system bus).

Peripheral integration includes a full-featured USB 2.0 interface with built-in PLL, hardware-accelerated CRC (CCITT CRC16 and IEEE-802.3 CRC32), HDMI-CEC/remote receiver (2 channels), and a programmable LCDC with internal dividing resistors and blinking control - all operating within 1.65–3.6 V supply range, with USB requiring ≥3.0 V.

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 STM32F103VCT6 and RA4M1, CY9AFB41NBBGL-GE1 uniquely integrates LCDC bias generation, USB device/host coexistence, and dual-bank Flash - reducing component count and firmware complexity in cost-sensitive embedded HMI designs.

Availability

CY9AFB41NBBGL-GE1 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, home appliance control boards, and building automation sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY9AFB41NBBGL-GE1 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 R&D infrastructure.

The CY9AB40NB series - including CY9AFB41NBBGL-GE1 - was designed specifically for cost-optimized, low-power embedded controllers in human-machine interface applications requiring integrated LCD driving, USB connectivity, and robust real-time operation.

FAQ

What power supply voltage ranges are supported for USB and LCDC operation?

CY9AFB41NBBGL-GE1 requires VCC = 3.0–3.6 V when USB functionality is active, and VCC = 2.2–3.6 V when LCDC is used. The full operating range is 1.65–3.6 V, but these subsystem-specific minima ensure signal integrity and bias generation stability. USB DP/DM pins include integrated ESD protection rated to ±2 kV HBM.

Does this MCU support simultaneous USB device and host operation?

No - the USB interface supports device mode and host mode, but not concurrently. Mode selection is configured at initialization via USBCTL register settings. Device mode uses internal pull-up on USB_DP; host mode requires external VBUS detection and SOF generation. Both modes share the same DP/DM pins and endpoint resources.

How is the dual-bank Flash memory organized and accessed?

The 256 KB Flash comprises a 240 KB upper bank and a 16 KB lower bank (main), plus a 32 KB work area within the lower bank. Banks are independently erasable and writable; code execution can continue from one bank while the other is updated. Access is controlled via FLMCR and FLMDR registers; no external memory controller is needed.

Which pins support 5 V tolerance and how is it enabled?

Specific GPIO pins (e.g., P00–P07, P10–P17, P20–P27 per Pin Assignment Table) are 5 V tolerant when configured as inputs. Tolerance is inherent - no register setting required - but output drivers remain 3.3 V. External series resistors are recommended for protection when driving 5 V loads to avoid latch-up under transient overvoltage.