Infineon Technologies CY9AFA41NBPMC-G-JNE2

Overview

CY9AFA41NBPMC-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), 40 MHz max CPU frequency, and integrated LCD controller supporting up to 40 SEG × 8 COM. It targets embedded control in industrial HMI, smart metering, and low-power IoT edge nodes requiring on-chip display driving and secure firmware execution.

For engineers reviewing the CY9AFA41NBPMC-G-JNE2 datasheet, CY9AFA41NBPMC-G-JNE2 pinout, CY9AFA41NBPMC-G-JNE2 application, or CY9AFA41NBPMC-G-JNE2 equivalent, key selection criteria include dual-bank Flash for safe firmware updates, 5 V-tolerant GPIOs on selected pins, hardware flow control on UART ch.4, HDMI-CEC transceiver support, and six low-power modes including Deep Standby RTC with RAM retention.

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 subsystem features dual-operation Flash enabling concurrent read/erase/write across upper (240 KB) and lower (16 KB main + 32 KB work) banks, and split SRAM architecture (SRAM0 on I/D buses, SRAM1 on system bus) for deterministic code/data 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 FIFO-based scan/priority modes, and a programmable LCD controller with internal bias resistors and blinking function - all operating within 1.65–3.6 V supply range (2.2–3.6 V when LCDC active).

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 STM32F103C8T6, CY9AFA41NBPMC-G-JNE2 provides dedicated LCD driving and HDMI-CEC functionality essential for consumer electronics HMI, while trading off USB and higher clock speed for lower power consumption and dual-bank Flash safety - making it optimal for cost-sensitive, display-centric industrial edge devices.

Availability

CY9AFA41NBPMC-G-JNE2 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, home appliance controllers, and IoT edge nodes requiring stable component supply, long-term lifecycle support, and qualified automotive-grade traceability.

Supply support for CY9AFA41NBPMC-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 device belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-optimized, low-power embedded control applications requiring integrated analog peripherals, LCD driving, and robust firmware update capability.

FAQ

What is the maximum operating frequency and supported clock sources?

The CY9AFA41NBPMC-G-JNE2 operates up to 40 MHz using five selectable clock sources: two external oscillators (main clock 4–48 MHz, sub-clock 32.768 kHz), two built-in CR oscillators (4 MHz high-speed, 100 kHz low-speed), and a main PLL. The PLL can accept either the main clock or the 4 MHz CR oscillator as input, enabling flexible frequency synthesis for performance or power optimization.

Does this MCU support firmware updates without interrupting operation?

Yes - its dual-bank Flash architecture (240 KB upper bank + 16 KB lower bank main area + 32 KB lower bank work area) allows simultaneous read from one bank while erasing/writing to the other. This enables safe over-the-air or field firmware updates with zero runtime interruption, verified in Infineon's FM3 Peripheral Manual TYPE6 configuration.

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

Specific GPIO pins - including PA0–PA7, PB0–PB7, PC0–PC7, and PD0–PD7 - are 5 V tolerant when configured as inputs. Tolerance is inherent to the I/O circuit design and requires no external enable signal or register setting; however, the Pin Description table in the datasheet (page 15) must be consulted to confirm exact pin assignments and usage constraints under 5 V conditions.

Is hardware flow control available on all UART channels?

No - hardware flow control (CTS/RTS) is supported exclusively on UART channel 4 (TXD4/RXD4/CTS4/RTS4). Channels 0–3 lack dedicated CTS/RTS pins and associated control logic. This limitation is explicitly documented in the datasheet footnote on page 2: "CY9AFA41LB, FA42LB and FA44LB do not support Hardware Flow control," confirming ch.4 as the sole channel with this feature.