Infineon Technologies MB9AF311NAPMC-G-JNE2

Overview

MB9AF311NAPMC-G-JNE2 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 8-channel Base Timers, QPRC, and multi-function serial interfaces (UART/CSIO/LIN/I²C). It operates up to 40 MHz and targets embedded motor control and industrial automation systems.

For engineers reviewing the MB9AF311NAPMC-G-JNE2 datasheet, MB9AF311NAPMC-G-JNE2 pinout, MB9AF311NAPMC-G-JNE2 application, or MB9AF311NAPMC-G-JNE2 equivalent, key selection criteria include USB dual-role capability, 16-channel 12-bit ADC with FIFO, hardware flow control on UART ch.4, external bus interface support, and dual watchdog timers with independent CR oscillators for fail-safe operation.

Technical Context

The MB9AF311NAPMC-G-JNE2 implements the Arm Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels. Its memory subsystem includes zero-wait-state Flash and dual-bus-connected SRAM banks-SRAM0 on I-code/D-code buses and SRAM1 on the system bus-enabling concurrent CPU and DMA access.

Peripheral architecture integrates dedicated hardware accelerators: CRC16/32 engine for data integrity, USB PLL for clock generation from main oscillator, and QPRC units with configurable A/B/Z input edge detection for precise encoder position tracking in real-time motion control loops.

Key Specifications

Pinout & Package

MB9AF311NAPMC-G-JNE2 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across five I/O groups (P0–P4), each supporting port relocation for flexible peripheral mapping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit motor control microcontroller applications.

Compared with MB9AF312NAPMC-G-JNE2, the MB9AF311NAPMC-G-JNE2 omits EBI and one ADC unit - reducing BOM cost while retaining full motor control capability. Versus STM32F303VCT6, it delivers native USB host, dual QPRC, and tighter hardware timer–ADC synchronization - essential for high-fidelity motion control without software overhead.

Availability

MB9AF311NAPMC-G-JNE2 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, PLC I/O expansion, and smart energy monitoring devices requiring stable component supply and long-term lifecycle support.

Supply support for MB9AF311NAPMC-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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, and security solutions with vertical integration from silicon to system-level IP.

This part belongs to the FM3 family of 32-bit Arm Cortex-M3 microcontrollers, designed specifically for cost-sensitive, high-reliability embedded control applications demanding integrated motor control peripherals, USB connectivity, and robust low-power operation.

FAQ

What debug interface does MB9AF311NAPMC-G-JNE2 support?

It supports Serial Wire JTAG Debug Port (SWJ-DP) compliant with Arm CoreSight standards. The device does not include Embedded Trace Macrocell (ETM); trace functionality is unavailable. Debug access uses SWDIO and SWCLK pins, with optional reset via nTRST, enabling full halt-mode debugging, memory inspection, and flash programming via standard tools like Segger J-Link or ST-Link v2 adapters.

Does MB9AF311NAPMC-G-JNE2 support USB device and host simultaneously?

No - it supports USB device and host modes, but not concurrently. Mode selection is controlled by the USBMODE bit in the USBPHYCR register during initialization. Switching between modes requires software reconfiguration and PHY reset; shared endpoint buffers and controller resources prevent true dual-role operation without external multiplexing.

What is the maximum operating temperature range for this MCU?

The MB9AF311NAPMC-G-JNE2 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is validated per its qualification per AEC-Q100 Grade 2 (for automotive-adjacent use) and JEDEC JESD22-A108. Thermal performance assumes proper PCB copper pour under the exposed pad and ≤100 mA average I/O current loading per port group.

Can the internal 100 kHz CR oscillator be used as the main clock source?

Yes - the low-speed CR oscillator (100 kHz) can serve as the main clock input when the Main PLL is bypassed. However, maximum CPU frequency is then limited to 100 kHz, making it suitable only for ultra-low-power standby states. For full-performance operation (up to 40 MHz), an external crystal (4–48 MHz) or the 4 MHz high-speed CR oscillator must be selected as the PLL input source.