Infineon Technologies CY9AF314MPMC-G-MJE1

Overview

CY9AF314MPMC-G-MJE1 from Infineon Technologies (formerly Cypress) is a 32-bit Arm® Cortex®-M3 microcontroller with 512 KB on-chip Flash, 32 KB SRAM (split into two 16 KB banks), USB 2.0 Full-Speed device/host interface, and integrated motor control peripherals including QPRC, multi-function timers, and 12-bit ADCs. It operates up to 40 MHz, supports 2.7–5.5 V supply, and targets embedded motor control and industrial automation systems requiring real-time I/O coordination and low-power operation.

For engineers reviewing the CY9AF314MPMC-G-MJE1 datasheet, CY9AF314MPMC-G-MJE1 pinout, CY9AF314MPMC-G-MJE1 application, or CY9AF314MPMC-G-MJE1 equivalent, key selection criteria include USB dual-role capability, 83 GPIOs in 100-pin LQFP package, hardware flow control exclusion (per datasheet Rev. *E, p.2), external bus interface absence, and FM3 family peripheral compatibility per TYPE1 classification.

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 includes separate I-code/D-code bus access to SRAM0 and system bus access to SRAM1-enabling concurrent instruction fetch and data access without contention.

The peripheral set is optimized for motion control: dual QPRC units decode quadrature encoder signals with 16-bit position/revolution counters and configurable AIN/BIN/ZIN edge detection; multi-function timers provide PWM, dead-time insertion, and A/D activation triggers; and the 12-bit successive-approximation ADC achieves 1.0 μs conversion at 5 V with FIFO-based scan and priority modes.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3. Pin functions are defined per "Pin Assignment" (p.9) and "List of Pin Functions" (p.15) in datasheet 002-04674 Rev. *E.

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, CY9AF314MPMC-G-MJE1 delivers hardware-accelerated motor control (QPRC, dead-time PWM, A/D-triggered timers) and dual-role USB - reducing firmware complexity and external component count in motion-critical industrial designs.

Availability

CY9AF314MPMC-G-MJE1 is available at Aetrix Electronics and suitable for industrial motor drives, smart HVAC controllers, PLC I/O modules, and USB-capable industrial gateways requiring stable component supply across extended production lifecycles.

Supply support for CY9AF314MPMC-G-MJE1 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, and industrial control solutions.

The CY9AF314MPMC-G-MJE1 belongs to the FM3 family of 32-bit microcontrollers, designed specifically for cost-sensitive, high-performance embedded motor control and industrial automation applications requiring integrated analog, timing, and communication peripherals.

FAQ

Does CY9AF314MPMC-G-MJE1 support hardware flow control on UART?

No. According to datasheet 002-04674 Rev. *E page 2, hardware flow control (CTS/RTS) is explicitly unsupported on CY9AF314MPMC-G-MJE1 - unlike some other FM3 variants such as CY9AF315MA/NA. Software-controlled handshaking or external logic must be used for flow management on UART channels 0–3.

What is the maximum operating frequency of the main PLL?

The main PLL supports output frequencies up to 80 MHz when driven by the 4–48 MHz main clock input, as specified in Section 12.4.4 of the datasheet. However, the Cortex-M3 core is rated for 40 MHz operation, so PLL output must be divided before CPU clocking - enabling precise peripheral clock derivation while maintaining core timing compliance.

Is external bus interface available on this part?

No. The CY9AF314MPMC-G-MJE1 does not implement the external bus interface, as confirmed in the datasheet footnote on page 2: "CY9AF311LA, F312LA and F314LA do not support External Bus Interface." This omission reduces pin count and simplifies PCB routing for applications relying solely on on-chip memory and serial peripherals.

How many USB endpoints are supported, and what transfer types do they handle?

CY9AF314MPMC-G-MJE1 supports six USB endpoints (0–5). Endpoint 0 handles control transfers only. Endpoints 1–5 support bulk, interrupt, and isochronous transfers; EP1 offers 256-byte buffer size, while EP0 and EP2–EP5 use 64-byte buffers. Double buffering is implemented on all endpoints except EP0, enabling efficient data streaming in device or host mode.