Infineon Technologies CY9AFA42MAPMC-G-MNE2

Overview

CY9AFA42MAPMC-G-MNE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 256 KB dual-bank Flash, 32 KB on-chip SRAM, integrated LCD controller (40×8), 24-channel 12-bit ADC (2.0 μs conversion), and hardware flow control on UART ch.4 - deployed in industrial HMI panels requiring low-power operation and local display driving.

For engineers reviewing the CY9AFA42MAPMC-G-MNE2 datasheet, CY9AFA42MAPMC-G-MNE2 pinout, CY9AFA42MAPMC-G-MNE2 application, or CY9AFA42MAPMC-G-MNE2 equivalent, key selection criteria include dual-bank Flash execution capability, 5 V-tolerant GPIO count (up to 83 pins), RTC with leap-year support, HDMI-CEC transceiver integration, and Deep Standby RTC mode with RAM retention.

Technical Context

This MCU implements the ARM Cortex-M3 r2p1 core at up to 40 MHz with NVIC supporting 48 peripheral interrupts and 16 priority levels. It integrates dual-operation Flash (240 KB upper + 16 KB lower bank) enabling concurrent read/erase/write operations per bank - critical for firmware-over-the-air (FOTA) updates without halting real-time tasks.

The peripheral set includes an 8-channel DMA controller with independent bus access, two 12-bit successive-approximation ADC units with FIFO-based scanning, and a dedicated LCDC supporting 40 SEG × 8 COM with internal bias resistors and blinking control - all operating within 1.65–3.6 V supply range and six configurable low-power modes including Deep Standby Stop with optional RAM retention.

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, CY9AFA42MAPMC-G-MNE2 uniquely integrates segment LCD driving, HDMI-CEC transceiver, and dual-bank Flash - reducing component count and firmware complexity in cost-sensitive, display-rich consumer and industrial edge devices.

Availability

CY9AFA42MAPMC-G-MNE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, remote control receivers, and home appliance controllers requiring stable component supply, long-term lifecycle support, and qualified automotive-grade reliability.

Supply support for CY9AFA42MAPMC-G-MNE2 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 AG is a German semiconductor manufacturer specializing in power management, automotive MCUs, and security solutions - acquired Cypress Semiconductor in 2020 to expand its embedded control portfolio.

CY9AFA42MAPMC-G-MNE2 belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, low-power industrial and consumer applications requiring integrated display, communication, and sensor interface capabilities.

FAQ

What is the maximum operating frequency of the CY9AFA42MAPMC-G-MNE2 core?

The ARM Cortex-M3 core operates at up to 40 MHz, derived from either the main external oscillator (4–48 MHz) or the internal high-speed CR oscillator (4 MHz), with optional multiplication via the main PLL. This frequency is validated across the full operating voltage range (1.65–3.6 V) and industrial temperature range (−40°C to +85°C).

Does CY9AFA42MAPMC-G-MNE2 support external memory expansion?

No - unlike earlier FM3 series variants (e.g., CY9AFA41LB), CY9AFA42MAPMC-G-MNE2 does not include an External Bus Interface. Its memory subsystem relies solely on on-chip dual-bank Flash (256 KB) and SRAM (32 KB), optimized for self-contained applications without external NOR Flash or SRAM requirements.

Can the LCD controller drive dot-matrix displays?

No - the integrated LCDC supports only static or multiplexed segment-type LCDs (up to 40 SEG × 8 COM). It lacks the frame buffer, timing engine, and RGB interface required for dot-matrix or TFT displays. The controller provides dedicated VV0–VV4 bias pins and internal resistor ladder for segment contrast control.

Is hardware debug supported, and what interface is used?

Yes - CY9AFA42MAPMC-G-MNE2 supports Serial Wire JTAG Debug Port (SWJ-DP) compliant with ARM CoreSight standards. It does not include Embedded Trace Macrocell (ETM); trace capability is limited to SWD-based breakpoints, register inspection, and memory access - sufficient for functional validation and real-time debugging in resource-constrained embedded systems.