Infineon Technologies CY9BF306NBPMC-G-UNE1

Overview

CY9BF306NBPMC-G-UNE1 from Infineon Technologies (formerly Cypress) is a 32-bit Arm® Cortex®-M3 microcontroller with 512 KB on-chip Flash, 64 KB SRAM (32 KB SRAM0 + 32 KB SRAM1), and integrated USB 2.0 Full-Speed Device/Host interface. It operates up to 80 MHz, includes Memory Protection Unit (MPU), NVIC with 48 peripheral interrupts, and targets motor control, industrial automation, and embedded HMI applications.

For engineers reviewing the CY9BF306NBPMC-G-UNE1 datasheet, CY9BF306NBPMC-G-UNE1 pinout, CY9BF306NBPMC-G-UNE1 application, or CY9BF306NBPMC-G-UNE1 equivalent, key selection criteria include USB dual-role capability, 16-channel 12-bit ADC with 1.0 μs conversion time, QPRC encoder interface, motor-control timers with dead-time insertion, and dual watchdog (hardware + software) for functional safety-critical designs.

Technical Context

The CY9BF306NBPMC-G-UNE1 implements an Arm Cortex-M3 r2p0 core with tightly coupled I-code/D-code buses feeding SRAM0 and system bus access to SRAM1. Its clock system integrates five sources-including 4–48 MHz main oscillator, 32.768 kHz sub-clock, and dual CR oscillators-with dynamic switching and Clock Supervisor (CSV) for external clock failure detection.

Peripheral integration centers on real-time control: dual QPRC units for position sensing, 8-channel Base Timers supporting PWM/PPG/PWC modes, 2-unit Multi-function Timers with A/D activation compare and DTIF emergency stop, and 8-channel DMA with independent bus arbitration enabling concurrent CPU/DMA operation without contention.

Key Specifications

Pinout & Package

Package: 120-pin LQFP (14 mm × 14 mm, 0.4 mm pitch), RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F207ZGT6 and RA4M1, CY9BF306NBPMC-G-UNE1 uniquely combines USB Device/Host, dual QPRC, DTIF, and LIN 2.1 in a single die-enabling compact, self-contained motor and body control nodes without companion ICs.

Availability

CY9BF306NBPMC-G-UNE1 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body controllers, smart energy hubs, and PLC I/O modules requiring stable component supply across multi-year production cycles.

Supply support for CY9BF306NBPMC-G-UNE1 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 systems, automotive MCUs, and security solutions.

This device belongs to the FM3 family of high-performance, cost-optimized Arm Cortex-M3 microcontrollers designed for real-time motor control, industrial automation, and automotive body electronics with integrated analog and communication peripherals.

FAQ

What is the maximum operating frequency and associated voltage range?

The CY9BF306NBPMC-G-UNE1 achieves up to 80 MHz operation within its specified VCC range of 2.7 V to 5.5 V. At 5.0 V, full 80 MHz performance is guaranteed per datasheet AC characteristics; at 2.7 V, maximum frequency is derated to 60 MHz to maintain timing margins and signal integrity across all peripherals including USB and ADC.

Does this MCU support USB device enumeration without external components?

Yes. The MCU integrates a full-speed USB 2.0 transceiver with internal pull-up resistors and differential termination. When configured as a device, it enumerates directly on standard USB hosts using only the USB_DP/USB_DM pins and a 1.5 kΩ pull-up on USB_DP-no external PHY, resistors, or magnetics are required for basic HID or CDC-class devices.

How is the quadrature encoder interface implemented and what resolution does it support?

The MCU provides two independent QPRC units, each with dedicated AIN, BIN, and ZIN input pins. Each unit features a 16-bit position counter and 16-bit revolution counter, supporting 65,536-position resolution per revolution. Edge detection polarity (rising/falling/both) on all three inputs is programmable, enabling compatibility with open-collector, push-pull, and differential encoder outputs.

What debug interfaces are available and are they accessible in all power modes?

The MCU supports Serial Wire JTAG Debug Port (SWJ-DP) and Embedded Trace Macrocell (ETM) for full instruction tracing. Debug access is available in RUN, SLEEP, and TIMER modes but disabled in STOP mode to preserve ultra-low leakage. SWD pins (SWCLK/SWDIO) share functions with GPIO, allowing reconfiguration after debug initialization to reclaim pins for application use.