Infineon Technologies CY9AFA42MBPMC-G-JNE2

Overview

CY9AFA42MBPMC-G-JNE2 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, and targets embedded control in industrial HMI and appliance panels.

For engineers reviewing the CY9AFA42MBPMC-G-JNE2 datasheet, CY9AFA42MBPMC-G-JNE2 pinout, CY9AFA42MBPMC-G-JNE2 application, or CY9AFA42MBPMC-G-JNE2 equivalent, key selection criteria include dual-operation flash capability, 24-channel 12-bit ADC with 2.0 µs conversion time, hardware flow control on UART ch.4, HDMI-CEC transceiver support, and 100-pin LQFP package with 5 V-tolerant I/O pins.

Technical Context

This MCU 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-bank Flash enabling concurrent read/erase/write operations and two independent SRAM banks (SRAM0 on I/D-code bus, SRAM1 on system bus) for deterministic real-time access.

The peripheral set includes an 8-channel DMA controller with 32-bit addressing, multi-function serial interfaces (UART/CSIO/I²C) configurable per channel, and dedicated hardware accelerators for CRC16/CRC32. Clock supervision uses built-in CR oscillators to monitor external clock integrity, while low-voltage detection provides dual-stage reset/interrupt response (LVD1 interrupt, LVD2 reset).

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 STM32F103VET6 and RA4M1, CY9AFA42MBPMC-G-JNE2 uniquely integrates HDMI-CEC transceiver, dual-bank Flash, and 40×8 segment LCD driver in a single 100-pin LQFP package - reducing BOM count and firmware complexity for appliance remote control and display applications.

Availability

CY9AFA42MBPMC-G-JNE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart appliance control units, remote control hubs, and energy meter display modules requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFA42MBPMC-G-JNE2 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 security solutions, with global R&D and manufacturing infrastructure.

This part belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, low-power embedded control applications requiring integrated LCD, remote control, and real-time peripheral interfaces.

FAQ

Does CY9AFA42MBPMC-G-JNE2 support external memory expansion?

No. Unlike earlier CY9AA40NB series variants such as CY9AFA41LB, the CY9AFA42MBPMC-G-JNE2 explicitly omits External Bus Interface support per the official datasheet (Rev. *D, Page 2). It relies solely on on-chip Flash and SRAM for program and data storage, making it suitable for self-contained applications without NOR Flash or SRAM expansion needs.

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

The CY9AFA42MBPMC-G-JNE2 operates its ARM Cortex-M3 core at up to 40 MHz, as confirmed in the datasheet's "Features" section and electrical characteristics tables. This frequency is achievable using the main PLL with either an external 4–48 MHz crystal or the internal 4 MHz CR oscillator as the PLL input source.

Is hardware flow control available on all UART channels?

Hardware flow control (CTS/RTS) is supported only on UART channel 4, as documented in the datasheet footnote on Page 2. Channels 0–3 do not implement this feature. Designers requiring RTS/CTS must route critical serial links (e.g., to Bluetooth modules or modems) exclusively through UART ch.4.

Can the internal RTC maintain time accuracy during Deep Standby Stop mode?

No. The RTC remains active only in Sleep, Timer, RTC, Stop, and Deep Standby RTC modes. In Deep Standby Stop mode, both the RTC and Watch Counter are halted, and all registers except backup registers are reset. Timekeeping resumes only after exit from Deep Standby Stop and reinitialization of the RTC module.