Infineon Technologies CY9AF342NBBGL-GE1

Overview

CY9AF342NBBGL-GE1 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), USB 2.0 Full-Speed Device/Host interface, and 24-channel 12-bit ADC operating in 2.0 μs conversion time. It supports six low-power modes including Deep Standby RTC and integrates HDMI-CEC, RTC, and hardware CRC acceleration for embedded control in industrial HMI and smart appliance applications.

For engineers reviewing the CY9AF342NBBGL-GE1 datasheet, CY9AF342NBBGL-GE1 pinout, CY9AF342NBBGL-GE1 application, or CY9AF342NBBGL-GE1 equivalent, key selection criteria include dual-bank Flash execution capability, USB host/device coexistence, 5V-tolerant GPIO allocation via port relocate function, and sub-3.6 V operation with LVD1/LVD2 voltage monitoring.

Technical Context

This MCU implements an ARM Cortex-M3 r2p1 core running at up to 40 MHz with integrated NVIC (48 peripheral interrupts, 16 priority levels) and SysTick timer. Its memory subsystem features dual-operation Flash (240 KB upper + 16 KB lower bank) enabling concurrent read/erase/write, plus two independent SRAM banks (SRAM0 on I/D bus, SRAM1 on system bus).

The peripheral set includes a full-featured USB 2.0 controller with built-in PLL, eight base timers supporting PWM/PPG/reload modes, eight-channel DMA with 32-bit addressing, and multi-function serial interfaces (UART/CSIO/I²C) across eight channels - four with 16×9-bit FIFO and four without.

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, CY9AF342NBBGL-GE1 uniquely combines USB device/host duality, integrated HDMI-CEC, and dual-bank Flash in a single 100-pin LQFP package - critical for space-constrained consumer electronics requiring remote control interoperability and field-upgradable firmware.

Availability

CY9AF342NBBGL-GE1 is available at Aetrix Electronics and suitable for industrial HMI panels, smart appliance controllers, energy metering gateways, and USB-enabled test fixtures requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY9AF342NBBGL-GE1 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, and security solutions.

CY9AF342NBBGL-GE1 belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, designed specifically for cost-sensitive, low-power embedded control applications requiring rich peripheral integration and field firmware update capability.

FAQ

What is the maximum operating frequency of the CY9AF342NBBGL-GE1 core?

The CY9AF342NBBGL-GE1 integrates an ARM Cortex-M3 r2p1 core rated for up to 40 MHz operation under recommended conditions (VCC = 3.0–3.6 V, ambient temperature ≤ 85°C). This frequency is achieved using the main PLL with either external crystal (4–48 MHz) or internal high-speed CR oscillator (4 MHz) as input source.

Does CY9AF342NBBGL-GE1 support USB host functionality without external components?

Yes - the part includes a fully integrated USB 2.0 Full-Speed host controller with built-in PLL, endpoint buffers, and token handshake logic. It supports bulk/interrupt/isochronous transfers and automatic device detection, requiring only standard USB connectors and ESD protection diodes on DP/DM lines.

How does the dual-bank Flash architecture improve firmware reliability?

Dual-bank Flash allows independent erase/write operations on the upper (240 KB) and lower (16 KB) banks. During OTA updates, new firmware can be written to one bank while the system executes from the other - eliminating boot failures due to interrupted writes and enabling atomic firmware swaps via vector table remapping.

Which pins support 5V tolerance, and how is this confirmed?

Specific GPIO pins - including PA0–PA7, PB0–PB7, PC0–PC7, and PD0–PD7 - are 5V tolerant when configured as inputs. This is documented in Section 5 ("I/O Circuit Type") and Pin Description tables of the official datasheet (002-05635 Rev. *D), verified by absolute maximum rating of VIN = –0.3 V to 5.5 V for designated pins.