Infineon Technologies CY9AFA44MBBGL-GK9E1

Overview

CY9AFA44MBBGL-GK9E1 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), and integrated peripherals including LCD controller (40 SEG × 8 COM), 24-channel 12-bit ADC (2.0 μs conversion time), 8-channel DMA, and HDMI-CEC/remote receiver. It operates at up to 40 MHz and supports six low-power modes for embedded control in industrial HMI and appliance panels.

For engineers reviewing the CY9AFA44MBBGL-GK9E1 datasheet, CY9AFA44MBBGL-GK9E1 pinout, CY9AFA44MBBGL-GK9E1 application, or CY9AFA44MBBGL-GK9E1 equivalent, key selection considerations include dual-bank Flash execution capability, 5 V-tolerant GPIO allocation via port relocate function, RTC with leap-year support, and absence of hardware flow control on UART ch.4 - critical for firmware update and power-managed UI subsystem design.

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 RTOS scheduling. Its memory architecture separates instruction (I-code) and data (D-code) paths for SRAM0 while routing SRAM1 over the system bus - enabling concurrent CPU and DMA access without contention.

The peripheral set targets human-machine interface applications: LCDC drives segmented displays directly with internal bias resistors and blinking control; HDMI-CEC block handles header transmission, arbitration loss detection, and automatic ACK reply; and dual watchdogs (hardware CR-clocked + software) ensure robust recovery across Sleep, RTC, and Deep Standby Stop modes.

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, CY9AFA44MBBGL-GK9E1 uniquely integrates both segmented LCD driving and HDMI-CEC protocol handling - eliminating two external ICs in consumer electronics UI designs while maintaining Cortex-M3 determinism and low-power operation.

Availability

CY9AFA44MBBGL-GK9E1 is available at Aetrix Electronics and suitable for industrial HMI panels, smart appliance control units, energy metering interfaces, and building automation sensors requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFA44MBBGL-GK9E1 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 R&D and manufacturing infrastructure.

This device belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-optimized, low-power embedded control in human-machine interface and appliance applications with integrated display and remote control functionality.

FAQ

Does CY9AFA44MBBGL-GK9E1 support hardware flow control on UART?

No. According to the official datasheet (Rev. *D, Page 2), CY9AFA44MBBGL-GK9E1 does not support hardware flow control (CTS/RTS) on any UART channel, unlike earlier FM3 variants. This omission simplifies PCB routing but requires software-based transmit buffering in high-throughput serial applications.

What is the maximum operating frequency of the ARM Cortex-M3 core in this MCU?

The CY9AFA44MBBGL-GK9E1 operates its ARM Cortex-M3 core at up to 40 MHz, as confirmed in the "Features" section of the datasheet (Document Number 002-05633 Rev. *D). This frequency is achievable using the main PLL clock sourced from either an external crystal (4–48 MHz) or the internal high-speed CR oscillator (4 MHz).

Can the LCD controller drive common-anode or common-cathode displays?

Yes. The LCDC supports both configurations: it provides eight COM outputs that can be configured as either source (common-anode) or sink (common-cathode) depending on the LCDC mode register setting. The internal dividing resistor network and VV0–VV4 bias pins allow direct connection to standard 40×8 segmented glass displays without external components.

Is the 41-bit Unique ID accessible via standard debug interface?

Yes. The 41-bit unique device ID is readable via the Serial Wire JTAG Debug Port (SWJ-DP) using standard CMSIS-DAP or J-Link protocols. It resides in a dedicated system register (UIDR) and is available during debug session enumeration or through bootloader firmware queries without requiring special unlock sequences.