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Infineon Technologies CY9AF311LAQN-G-AVE2
- Part No.:
- CY9AF311LAQN-G-AVE2
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
CY9AF311LAQN-G-AVE2.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
CY9AF311LAQN-G-AVE2 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 and QPRC units. It operates up to 40 MHz, supports LIN 2.1, I²C, UART, CSIO, and features dual watchdog timers, CRC accelerator, and low-power STOP/SLEEP/TIMER modes - deployed in industrial motor drives and embedded control systems.
For engineers reviewing the CY9AF311LAQN-G-AVE2 datasheet, CY9AF311LAQN-G-AVE2 pinout, CY9AF311LAQN-G-AVE2 application, or CY9AF311LAQN-G-AVE2 equivalent, key selection criteria include its 100-pin LQFP package, dual-bank SRAM architecture for real-time task isolation, USB host/device dual-role capability, LIN 2.1 compliance, and absence of External Bus Interface - critical for cost-sensitive, space-constrained motion control designs.
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 separates instruction/data access (SRAM0 on I-code/D-code buses) from system bus traffic (SRAM1), enabling deterministic interrupt latency and concurrent DMA transfers.
The peripheral set targets motor control: Base Timers support PWM/PPG/PWC modes; Multi-function Timers provide input capture, A/D activation compare, and DTIF emergency stop; QPRC units decode quadrature encoder signals with 16-bit position/revolution counters and configurable AIN/BIN/ZIN edge detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3 r2p1, 40 MHz max - enables deterministic real-time execution with Thumb-2 instruction set and hardware divide. |
| Flash Memory | 512 KB, 0-wait-state read - supports fast interrupt response and in-field firmware updates without performance penalty. |
| SRAM | 32 KB total (SRAM0: 16 KB on I/D buses; SRAM1: 16 KB on system bus) - isolates critical code/data from DMA/peripheral traffic. |
| USB Interface | Full-Speed device/host with built-in PLL; 6 endpoints (EP0–EP5), double-buffered; EP1: 256-byte buffer - enables HID/class-compliant device stacks and host-side peripheral enumeration. |
| LIN Support | LIN 2.1 compliant with master/slave mode, programmable break field (13–16 bit), and delimiter (1–4 bit) - meets automotive body electronics timing and protocol requirements. |
| Power Supply | VCC: 2.7–5.5 V; USBVCC: 3.0–3.6 V (USB active) or 2.7–5.5 V (GPIO only) - simplifies power design across mixed-voltage subsystems. |
| Low-Power Modes | SLEEP, TIMER, STOP - STOP mode disables CPU/core clocks while retaining SRAM and register state; wake-up via QPRC, RTC, or external interrupt. |
Pinout & Package
Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P07 | General-purpose I/O port bank 0 | Configurable as GPIO, UART0/1 TX/RX, CSIO0/1, or LIN0/1 - supports port relocate function for flexible PCB routing. |
| P10–P17 | General-purpose I/O port bank 1 | Includes QPRC_AIN/QPRC_BIN inputs and Base Timer outputs - direct encoder interface without external logic. |
| P20–P27 | General-purpose I/O port bank 2 | USB D+/D−, USB VBUS detect, USB ID - enables full-speed USB device/host operation with minimal external components. |
| P30–P37 | General-purpose I/O port bank 3 | ADC0–ADC7 inputs, A/D activation trigger outputs - synchronizes analog sampling with timer events for precise motor current sensing. |
| CLKIN/CLKOUT | Main clock oscillator interface | Accepts 4–48 MHz crystal or external clock - feeds main PLL for CPU/USB clock generation. |
| XTAL1/XTAL2 | Sub-clock oscillator interface | 32.768 kHz crystal connection - powers watch counter and low-power wake-up timing. |
| RESET | Active-low reset input | Asynchronous reset assertion; supports power-on, watchdog, and software-initiated reset sequences. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-bank SRAM architecture | SRAM0 (16 KB) on I-code/D-code buses enables zero-wait interrupt vector fetch; SRAM1 (16 KB) on system bus handles DMA-peripheral transfers without CPU contention. |
| Motor control timer suite | 8-channel Base Timer + 2-unit Multi-function Timer + 2-unit QPRC - provides synchronized PWM generation, encoder position tracking, and emergency stop (DTIF) within single chip. |
| Integrated LIN 2.1 controller | Hardware-accelerated LIN frame generation, break field/delimiter programmability, and error detection - eliminates software protocol stack overhead in body control modules. |
| CRC accelerator | Hardware CCITT CRC16 and IEEE-802.3 CRC32 calculation - offloads integrity checks from CPU during firmware update or CAN/LIN message validation. |
| SWJ-DP debug interface | Serial Wire JTAG Debug Port only (no ETM) - enables full flash programming, breakpoint debugging, and real-time variable monitoring with standard ARM tools. |
Applications
| Industrial Motor Drive | Automotive Body Control Module |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers and pump systems using hall-effect or encoder feedback. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, PWM waveform generation, and quadrature position decoding via QPRC units. Use Value: Eliminates need for external encoder interface IC and dedicated motor timer ASIC; reduces BOM count by integrating ADC triggers, dead-time insertion, and emergency stop logic. | Use Scenario: Central gateway managing door locks, window lifts, and lighting via LIN sub-nodes in entry-level vehicles. IC Role / Device Role / Timing Role: LIN master node with hardware protocol handling, voltage monitoring (LVD), and wake-on-LIN functionality. Use Value: Meets LIN 2.1 timing tolerances without software bit-banging; supports multi-node diagnostics and sleep/wake coordination across vehicle domains. |
| USB Human Interface Device | Programmable Logic Controller I/O Module |
Use Scenario: Industrial HMI panel with USB keyboard/mouse emulation and local sensor data logging. IC Role / Device Role / Timing Role: USB device endpoint manager with double-buffered EP1 (256-byte) for HID report transmission and internal SRAM buffering. Use Value: Achieves <10 ms HID polling latency using zero-wait Flash and dual-bank SRAM; avoids external USB PHY or FIFO memory. | Use Scenario: DIN-rail mounted I/O expansion module with analog input conditioning and digital output switching. IC Role / Device Role / Timing Role: Analog acquisition controller with 12-bit ADC scanning, DMA-driven data transfer, and isolated digital output timing via Base Timers. Use Value: Enables 1 μs conversion time at 5 V with FIFO-based scan buffering - supports 10+ channel simultaneous sampling without CPU intervention. |
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 |
|---|---|---|---|
| STM32F103RCT6 | 72 MHz Cortex-M3, 256 KB Flash, 48 KB SRAM, no USB host, no LIN, no QPRC | Lacks integrated LIN 2.1 and quadrature encoder counters; requires external transceivers and logic for motor position feedback | Select when higher CPU speed and larger RAM are needed but motor-specific peripherals are implemented externally. |
| RA4M1 (R7FA4M1AB3CFM) | 48 MHz Cortex-M4F, 256 KB Flash, 32 KB SRAM, USB device only, no QPRC, no LIN hardware | Includes FPU and TrustZone but omits LIN controller and QPRC; uses software-based LIN stack with higher CPU load | Prefer for floating-point math-intensive tasks where LIN is handled via software and encoder counting is done via GPIO/interrupt. |
Compared with STM32F103RCT6 and RA4M1, CY9AF311LAQN-G-AVE2 delivers domain-specific integration for motor control and automotive body networks - its hardware LIN 2.1 engine, dual QPRC units, and Base Timer PWM/PPG modes reduce firmware complexity and improve real-time determinism in cost-sensitive embedded systems.
Availability
CY9AF311LAQN-G-AVE2 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, USB human interface devices, and programmable logic controller I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for CY9AF311LAQN-G-AVE2 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 German semiconductor manufacturer specializing in power management, automotive MCUs, and security solutions, with global R&D and manufacturing infrastructure.
The CY9A310A Series (FM3 family) was designed for high-performance, cost-sensitive embedded control applications - particularly motor control, industrial automation, and automotive body electronics - leveraging Arm Cortex-M3 efficiency with deeply integrated analog and communication peripherals.
FAQ
Does CY9AF311LAQN-G-AVE2 support USB host mode with external device enumeration?
Yes, it supports USB 2.0 Full-Speed and Low-Speed host mode with automatic device connect/disconnect detection, IN/OUT token handshake packet generation, and up to 256-byte packet length. The built-in USB PLL generates required clocking from the main oscillator, eliminating need for external crystal for USB operation.
What is the maximum ADC sampling rate and how is it synchronized with timers?
The 12-bit successive approximation ADC achieves 1.0 μs conversion time at 5 V supply. It supports scanning mode with 16-step FIFO and priority conversion with 4-step FIFO. A/D activation compare registers in Multi-function Timers trigger conversions on timer match events, enabling precise phase-current sampling aligned with PWM edges.
Is external bus interface available on this specific variant?
No, CY9AF311LAQN-G-AVE2 does not support the External Bus Interface. This feature is explicitly excluded per the datasheet footnote for CY9AF311LA, F312LA, and F314LA variants. Memory expansion must be implemented via SPI-connected flash or external serial EEPROM.
How does the dual watchdog system enhance system reliability?
It implements two independent watchdogs: a hardware watchdog clocked by the 100 kHz built-in CR oscillator (active in all low-power modes except STOP), and a software watchdog clocked by the main system clock. This layered approach ensures fail-safe reset even during clock failure or deep-sleep states, meeting IEC 61508 SIL-2 functional safety requirements for industrial control.
CY9AF311LAQN-G-AVE2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-VFQFN Exposed Pad
- Series:
- FM3 MB9A310A
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 40MHz
- Connectivity:
- CSIO, I2C, LINbus, UART/USART, USB
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 64KB (64K 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 9x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY9AF311LAQN-G-AVE2 FAQ
1.How can I place an order for CY9AF311LAQN-G-AVE2 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY9AF311LAQN-G-AVE2 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 CY9AF311LAQN-G-AVE2 reliable?
The price and inventory of CY9AF311LAQN-G-AVE2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY9AF311LAQN-G-AVE2 is usually 5 days.
3.What payment methods are accepted for CY9AF311LAQN-G-AVE2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY9AF311LAQN-G-AVE2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY9AF311LAQN-G-AVE2?
CY9AF311LAQN-G-AVE2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY9AF311LAQN-G-AVE2 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 CY9AF311LAQN-G-AVE2?
For technical support, including CY9AF311LAQN-G-AVE2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY9AF311LAQN-G-AVE2 requirements.
6.How does Aetrix verify that CY9AF311LAQN-G-AVE2 is sourced from the original manufacturer or authorized distributors?
All CY9AF311LAQN-G-AVE2 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 CY9AF311LAQN-G-AVE2 meets industry standards.
7.What is the process for return or replacement of CY9AF311LAQN-G-AVE2?
All CY9AF311LAQN-G-AVE2 units undergo pre-shipment inspection (PSI). If there is an issue with CY9AF311LAQN-G-AVE2, 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 CY9AF311LAQN-G-AVE2 part is unused and in its original packaging.
Return procedure for CY9AF311LAQN-G-AVE2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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