Infineon Technologies CY9AFA42LBPMC-G-JNE2

Overview

CY9AFA42LBPMC-G-JNE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 256 KB dual-bank Flash, 32 KB SRAM (16 KB SRAM0 + 16 KB SRAM1), and integrated LCD controller supporting up to 40×8 segments. It operates at up to 40 MHz, supports six low-power modes including Deep Standby RTC/Stop, and includes hardware CRC accelerator for CCITT CRC16 and IEEE-802.3 CRC32. Used in industrial HMI panels requiring integrated display control and low-power operation.

For engineers reviewing the CY9AFA42LBPMC-G-JNE2 datasheet, CY9AFA42LBPMC-G-JNE2 pinout, CY9AFA42LBPMC-G-JNE2 application, or CY9AFA42LBPMC-G-JNE2 equivalent, key selection criteria include dual-bank Flash for seamless firmware updates, 40×8 segment LCD driver without external bias circuitry, absence of External Bus Interface, and lack of hardware flow control on UART ch.4 - all confirmed in Rev. *D of Document 002-05633.

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-operation Flash (240 KB upper + 16 KB lower bank) enabling concurrent read-erase-write, 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, 24-channel 12-bit ADC with 2.0 μs conversion time and scan/priority modes, and HDMI-CEC/remote receiver with 4-byte buffer and repeat code detection. Clocking supports five sources including 32.768 kHz sub-clock and main PLL, with CSV and LVD2 providing clock supervision and auto-reset under undervoltage.

Key Specifications

Pinout & Package

Packaged in 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), CY9AFA42LBPMC-G-JNE2 exposes 83 fast GPIOs with port relocation, 5 V-tolerant capability on selected pins, and dedicated LCDC segment/com output pins (SEG0–SEG39, COM0–COM7).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit ARM Cortex-M3 microcontroller applications.

Compared with CY9AA40NBPMC-G-JNE2 and STM32F103VCT6, CY9AFA42LBPMC-G-JNE2 delivers optimal integration for LCD-centric embedded controllers - eliminating external bias components and CEC transceivers while maintaining competitive Flash/SRAM density and ultra-low deep-standby current.

Availability

CY9AFA42LBPMC-G-JNE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meter displays, home appliance control boards, and building automation sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for CY9AFA42LBPMC-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 industrial control solutions, with global R&D and manufacturing infrastructure.

CY9AFA42LBPMC-G-JNE2 belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, low-power embedded applications requiring integrated LCD control and robust peripheral sets without external memory expansion.

FAQ

Does CY9AFA42LBPMC-G-JNE2 support hardware flow control on UART?

No. According to Document 002-05633 Rev. *D, CY9AFA42LBPMC-G-JNE2 does not support hardware flow control (CTS/RTS) on UART channel 4 - a feature explicitly excluded for this part number. Software-based flow control or external logic must be used if handshaking is required.

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

The CY9AFA42LBPMC-G-JNE2 operates at up to 40 MHz, as confirmed in the "Features" section of Document 002-05633 Rev. *D. This frequency is achievable when using the main PLL with a 4–48 MHz external crystal or built-in 4 MHz CR oscillator as the input source.

Can the LCD controller drive a 40×8 segment display without external components?

Yes. The integrated LCDC provides internal dividing resistors and dedicated VV0–VV4 bias pins, enabling direct connection to a 40×8 segment LCD without external voltage dividers or charge pumps - verified in Section "LCD Controller" of the datasheet.

Is External Bus Interface (EBI) available on this part?

No. Document 002-05633 Rev. *D explicitly states that CY9AFA42LBPMC-G-JNE2 does not support the External Bus Interface. This omission distinguishes it from CY9AA40NBPMC-G-JNE2 and reduces pin count and complexity for applications not requiring external memory expansion.