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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Infineon Technologies CY9BF121MPMC1-G-JNE2

Name: CY9BF121MPMC1-G-JNE2
Brand: Infineon Technologies
SKU: CY9BF121MPMC1-G-JNE2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY9BF121MPMC1-G-JNE2

Manufacturer:: Infineon Technologies

Category:: Microcontrollers

Package:: 80-LQFP

Datasheet:: CY9BF121MPMC1-G-JNE2.pdf

Description:: IC MCU 32BIT 96KB FLASH 80LQFP

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Product details

Overview

CY9BF121MPMC1-G-JNE2 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), 72 MHz max CPU frequency, and integrated peripherals including UART/CSIO/I²C/LIN, 12-bit ADC (26 ch), 10-bit DAC (2 ch), RTC, and six low-power modes. It targets embedded motor control and industrial sensing applications requiring real-time responsiveness and code security.

For engineers reviewing the CY9BF121MPMC1-G-JNE2 datasheet, CY9BF121MPMC1-G-JNE2 pinout, CY9BF121MPMC1-G-JNE2 application, or CY9BF121MPMC1-G-JNE2 equivalent, key selection criteria include dual-bank Flash for safe firmware updates, 5 V-tolerant I/O on selected pins, hardware CRC accelerator (CCITT CRC16/IEEE-802.3 CRC32), and SWJ-DP debug interface with unique 41-bit ID.

Technical Context

This MCU implements a tightly coupled 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) to reduce bus contention.

The peripheral set includes eight-channel DMA with 32-bit addressing and burst/demand transfer modes; two independent 12-bit successive-approximation ADCs with 0.8 μs conversion time at 5 V and FIFO-based scan/priority conversion; and a multi-function serial interface supporting four UART/CSIO/LIN/I²C channels with hardware flow control (CTS/RTS on ch.4) and LIN 2.1-compliant break field generation (13–16 bit).

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M3 r2p1, up to 72 MHz - enables deterministic real-time execution with Thumb-2 instruction set and low-latency interrupt handling.
Flash Memory	256 KB dual-bank (240 KB upper + 16 KB lower main + 32 KB lower work) - supports background firmware update without halting application execution.
SRAM	32 KB total (16 KB SRAM0 + 16 KB SRAM1), split-bus architecture - isolates instruction/data access from system peripherals to prevent bus stalls.
ADC	Two 12-bit SAR units, 0.8 μs conversion @ 5 V, 26-channel input - delivers high-speed analog acquisition for closed-loop motor control and sensor fusion.
DAC	Two 10-bit R-2R DACs - provides precise analog output for reference generation or actuator biasing in industrial interfaces.
Clock Sources	Five sources: 4–48 MHz external main clock, 32.768 kHz sub-clock, 4 MHz/100 kHz internal CR oscillators, and Main PLL - enables robust clock supervision and flexible low-power mode transitions.
Low-Power Modes	Six modes (Sleep, Timer, RTC, Stop, Deep Standby RTC, Deep Standby Stop) with RAM retention options - extends battery life in portable and energy-constrained edge devices.

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
VCC / VSS	Power supply / Ground	Core and I/O power domains (2.7–5.5 V); separate VCC/VSS pairs per quadrant reduce noise coupling in mixed-signal operation.
XTAL / EXTAL	Main oscillator input/output	Accepts 4–48 MHz crystal or external clock; drives PLL for high-frequency system operation and timing-critical peripherals.
XT1 / XT2	Sub-clock oscillator input/output	Connects 32.768 kHz crystal for RTC and ultra-low-power wake-up timing with ±20 ppm accuracy.
SWDIO / SWCLK	Serial Wire Debug interface	Two-pin debug port supporting full SWJ-DP functionality - enables non-intrusive program download, breakpoint setting, and real-time register inspection.
P00–P07, P10–P17, etc.	Multi-function GPIO	Up to 65 high-speed I/O pins with per-pin pull-up control, direct level read, and port relocate function - allows flexible PCB layout and dynamic peripheral remapping without hardware changes.

Key Features

Feature	Design Value
Dual-bank Flash with zero-wait-state read	Enables simultaneous firmware execution and update - critical for fail-safe OTA upgrades in industrial controllers.
Hardware CRC accelerator (CRC16/CRC32)	Offloads integrity checks from CPU during communication or Flash verification - reduces latency and improves deterministic response in safety-critical paths.
5 V-tolerant I/O on designated pins	Eliminates level-shifting components when interfacing with legacy 5 V sensors or logic - simplifies BOM and board design in mixed-voltage systems.
Quadrature Position/Revolution Counter (QPRC)	Two independent 16-bit position + 16-bit revolution counters with configurable A/B/Z input edges - directly supports high-resolution encoder feedback in BLDC/PMSM motor drives.
Real-Time Clock with leap-year support	Maintains accurate calendar time across power cycles and deep sleep - enables timestamped logging and scheduled wake-up without external RTC IC.

Applications

Industrial Motor Control

Smart Sensor Node

Use Scenario: Closed-loop control of brushless DC motors in HVAC blowers and factory automation actuators.

IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms using PWM timers, ADC sampling, and QPRC-based rotor position tracking.

Use Value: Integrated 72 MHz Cortex-M3, dual 12-bit ADCs with 0.8 μs conversion, and hardware dead-time insertion enable sub-microsecond current loop control.

Use Scenario: Battery-powered environmental monitoring node measuring temperature, humidity, and CO₂ with wireless telemetry.

IC Role / Device Role / Timing Role: Low-power system orchestrator managing sensor acquisition, data preprocessing, and periodic BLE/Wi-Fi transmission bursts.

Use Value: Six low-power modes (including Deep Standby RTC with RAM retention) and sub-100 μA Sleep current extend battery life beyond 5 years on coin-cell power.

Automotive Body Electronics

Programmable Logic Controller (PLC) I/O Module

Use Scenario: LIN-based seat/mirror/window control module compliant with automotive OEM specifications.

IC Role / Device Role / Timing Role: LIN 2.1 master node generating programmable break fields (13–16 bit) and handling frame-level error detection (parity/framing/overrun).

Use Value: Dedicated LIN peripheral with hardware break delimiter generation (1–4 bit) ensures protocol compliance without CPU overhead or timing jitter.

Use Scenario: DIN-rail mounted digital I/O expansion module for industrial PLCs with isolated inputs/outputs.

IC Role / Device Role / Timing Role: Central controller managing opto-isolated 24 V DC inputs, relay drivers, and Modbus RTU over RS-485.

Use Value: Dual UART with hardware flow control (CTS/RTS on ch.4) and 5 V-tolerant GPIO simplify interface to industrial-level signaling and reduce external component count.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32F103VCT6	72 MHz Cortex-M3, 256 KB Flash, 48 KB SRAM, no dual-bank Flash or hardware CRC accelerator	Lacks built-in LIN support and QPRC; requires software CRC and external LIN transceiver	Preferred where larger SRAM and broader ecosystem support outweigh need for dual-bank Flash and LIN integration.
RA4M1 (R7FA4M1AB3CFM)	48 MHz Cortex-M4F, 256 KB Flash, 32 KB SRAM, includes TrustZone but no LIN or QPRC	Higher DSP capability and security features; lacks dedicated LIN peripheral and quadrature counter hardware	Chosen for secure firmware updates and floating-point math, not for LIN motor nodes or encoder-based motion control.

Compared with STM32F103VCT6 and RA4M1, CY9BF121MPMC1-G-JNE2 uniquely combines dual-bank Flash for safe firmware updates, hardware LIN 2.1 support, and integrated QPRC - making it optimal for cost-sensitive, real-time automotive body electronics and industrial motor control where protocol offload and encoder interface are mandatory.

Availability

CY9BF121MPMC1-G-JNE2 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and PLC I/O modules requiring stable component supply and long-term lifecycle assurance.

Supply support for CY9BF121MPMC1-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, industrial, and IoT solutions with strong emphasis on reliability and functional safety.

This device belongs to the FM3 family of 32-bit microcontrollers designed specifically for cost-optimized, low-power embedded control applications in industrial automation, motor drives, and automotive subsystems.

FAQ

What is the maximum operating voltage and temperature range for CY9BF121MPMC1-G-JNE2?

The device operates from 2.7 V to 5.5 V over an industrial temperature range of –40 °C to +85 °C. Absolute maximum ratings specify VCC up to 6.0 V and junction temperature up to +125 °C, but sustained operation outside recommended conditions may impact reliability and parametric performance per datasheet Section 12.1.

Does CY9BF121MPMC1-G-JNE2 support JTAG debugging?

It supports Serial Wire JTAG Debug Port (SWJ-DP) with SWDIO and SWCLK pins - compatible with standard Arm debug tools. Full JTAG boundary-scan (TCK/TMS/TDI/TDO) is not implemented; debug access relies exclusively on the two-pin SWD interface per Section 12.4.13 of the datasheet.

How many UART channels support hardware flow control?

Only channel 4 (UART4) supports full hardware flow control via CTS/RTS signals. Other UART channels (0–3, 5–7) operate in standard full-duplex mode without automatic RTS/CTS assertion, as confirmed in the "UART" feature section on page 2 of the datasheet.

Is the 32.768 kHz sub-clock required for RTC operation?

Yes - the RTC block requires the 32.768 kHz sub-clock (XT1/XT2) for calendar timekeeping and alarm functions. The RTC remains active in RTC, Deep Standby RTC, and Deep Standby Stop modes only when this crystal is connected and oscillating, as specified in Section "Real-Time Clock (RTC)" on page 3.

CY9BF121MPMC1-G-JNE2 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Package/Case:: 80-LQFP

Series:: FM3 MB9B120M

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M3

Core Size:: 32-Bit Single-Core

Speed:: 72MHz

Connectivity:: CSIO, I2C, LINbus, UART/USART

Peripherals:: DMA, LVD, POR, PWM, WDT

Number of I/O:: 65

Program Memory Size:: 96KB (96K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 16K x 8

Voltage - Supply (Vcc/Vdd):: 2.7V ~ 5.5V

Data Converters:: A/D 26x12b; D/A 2x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 105°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

CY9BF121MPMC1-G-JNE2 FAQ

1.How can I place an order for CY9BF121MPMC1-G-JNE2 through Aetrix?

Please submit a Request for Quotation (RFQ) for CY9BF121MPMC1-G-JNE2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CY9BF121MPMC1-G-JNE2 reliable?

The price and inventory of CY9BF121MPMC1-G-JNE2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY9BF121MPMC1-G-JNE2 is usually 5 days.

3.What payment methods are accepted for CY9BF121MPMC1-G-JNE2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY9BF121MPMC1-G-JNE2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY9BF121MPMC1-G-JNE2?

CY9BF121MPMC1-G-JNE2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY9BF121MPMC1-G-JNE2 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CY9BF121MPMC1-G-JNE2?

For technical support, including CY9BF121MPMC1-G-JNE2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY9BF121MPMC1-G-JNE2 requirements.

6.How does Aetrix verify that CY9BF121MPMC1-G-JNE2 is sourced from the original manufacturer or authorized distributors?

All CY9BF121MPMC1-G-JNE2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY9BF121MPMC1-G-JNE2 meets industry standards.

7.What is the process for return or replacement of CY9BF121MPMC1-G-JNE2?

All CY9BF121MPMC1-G-JNE2 units undergo pre-shipment inspection (PSI). If there is an issue with CY9BF121MPMC1-G-JNE2, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CY9BF121MPMC1-G-JNE2 part is unused and in its original packaging.

Return procedure for CY9BF121MPMC1-G-JNE2:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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