Infineon Technologies CY9BF122LPMC-G-MNE2

Overview

CY9BF122LPMC-G-MNE2 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), and integrated peripherals including 26-channel 12-bit ADC (0.8 µs conversion), dual DAC, eight UART/CSIO/I²C/LIN serial channels, and six low-power modes. It operates from 2.7 V to 5.5 V and supports up to 72 MHz core frequency for real-time motor control and embedded sensing applications.

For engineers reviewing the CY9BF122LPMC-G-MNE2 datasheet, CY9BF122LPMC-G-MNE2 pinout, CY9BF122LPMC-G-MNE2 application, or CY9BF122LPMC-G-MNE2 equivalent, key selection criteria include dual-bank Flash execution capability, 5 V-tolerant GPIO count (up to 65 pins in 80-pin LQFP), LIN 2.1 compliance, RTC with leap-year support, and SWJ-DP debug interface compatibility.

Technical Context

The CY9BF122LPMC-G-MNE2 implements an 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 bus, SRAM1 on system bus) for deterministic code/data access.

Peripheral integration includes a dedicated DMA controller with 8 channels supporting burst/demand transfers up to 4 GB address space, quadrature position/revolution counters with 16-bit position and revolution registers, and multi-function timers with PWM, PPG, input capture, and A/D activation compare functions - all optimized for closed-loop motor control and industrial I/O timing.

Key Specifications

Pinout & Package

This device is packaged in an 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are fully relocatable via register configuration, supporting flexible PCB layout and peripheral remapping.

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 RP2040, CY9BF122LPMC-G-MNE2 provides hardware-accelerated LIN 2.1, dual-bank Flash for zero-downtime updates, and integrated QPRC - reducing firmware complexity and external component count in motor control and automotive body modules.

Availability

CY9BF122LPMC-G-MNE2 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart energy metering, and factory automation I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for CY9BF122LPMC-G-MNE2 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.

CY9BF122LPMC-G-MNE2 belongs to the FM3 family of 32-bit Arm Cortex-M3 microcontrollers, designed specifically for cost-sensitive, low-power industrial and automotive embedded controllers requiring robust peripheral integration and field-upgradable firmware.

FAQ

Does CY9BF122LPMC-G-MNE2 support in-system programming via UART?

Yes, it supports bootloader-based firmware updates via UART using the built-in ROM bootloader. The bootloader activates on power-up when BOOT0 pin is held high, allowing reprogramming without debug hardware. It supports Flash write/erase operations and CRC verification of incoming data, but does not enable dual-bank swap during active execution - that requires application-level control of bank switching.

What is the maximum operating temperature range for this MCU?

The CY9BF122LPMC-G-MNE2 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Section 12.2 "Recommended Operating Conditions" of the datasheet (Document No. 002-05655 Rev. *K), with derating applied above 70 °C for sustained 72 MHz operation under worst-case VCC and load conditions.

Can the 10-bit DAC outputs drive analog actuators directly?

No, the two 10-bit R-2R DACs provide voltage outputs only (no current drive capability). Each DAC output has typical 1 kΩ source impedance and must be buffered with an external op-amp to drive loads below 10 kΩ. The datasheet specifies ±1 LSB INL and monotonicity, but no guaranteed output current - making direct actuator drive unsafe without amplification.

Is the unique 41-bit ID accessible via standard debug interface?

Yes, the factory-programmed 41-bit unique ID is readable via SWD using the CoreSight ROM Table and Debug Port APB access. It resides at address 0x000000E0 in the system control space and is accessible in both run and debug modes without special unlock sequences - enabling secure device authentication and license binding in production firmware.