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AM2612-Q1: Which communication interface support 300Mbps?

Shuqing Zhou
Expert 3345 points

Part Number: AM2612-Q1

Hi team,

I ask this for my customer.

My customer needs 300Mbps interface to communicate with other device. Which interface in am261 can support thi? Is FSI is fastest interface which just support 240Mbps?

How to find the max speed of these interface in AM261?

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BRs

Shuqing

  • 0
    TI__Mastermind 32973 points

    Hi Shuqing,

    FSI is not the fastest interface on the AM261x. While the FSI is limited to a maximum of 200 Mbps in dual-lane mode, the AM2612-Q1 provides other interfaces that meet or exceed the 300 Mbps requirement.

    Interface
    Max Speed
    Meets 300Mbps?
    Gigabit Ethernet
    1000 Mbps
    Yes
    USB 2.0 (High Speed)
    480 Mbps
    Yes
    FSI (Dual-lane)
    200 Mbps
    No
    MCAN (CAN FD)
    Up to 10 Mbps
    No

    Gigabit Ethernet is the most straightforward option for high-speed communication, offering up to 1000 Mbps throughput via the ICSS. Note that this requires an external Ethernet PHY.

    The FSI achieves its maximum speed using a 50 MHz clock in Double Data Rate (DDR) mode.

    Configuration
    Clock
    Data Lines
    Mode
    Max Data Rate
    Single-lane
    50 MHz
    1 (TXD0)
    DDR
    100 Mbps
    Dual-lane
    50 MHz
    2 (TXD0 + TXD1)
    DDR
    200 Mbps

    Important Constraints for FSI:

    • Hardware Limit: The AM261x provides only 1x FSI_TX and 1x FSI_RX per device. True multi-instance parallel FSI is not possible within a single device; to exceed 200 Mbps using FSI, one would need multiple AM261x devices coordinated at the system level.
    • Clock Limit: The maximum RXCLK rate is hard-limited to SYSCLK/2.
    • Full-Duplex: The FSI TX and RX cores operate independently, allowing for 200 Mbps in each direction simultaneously.
    Interface
    Instances
    Max Data Rate
    Gigabit Ethernet
    1
    1 Gbps
    USB 2.0
    1
    480 Mbps
    FSI
    1x TX + 1x RX
    200 Mbps
    SPI
    4 (2 on ZNC pkg)
    <40 Mbps
    UART
    6
    <20 Mbps
    MCAN
    2
    <10 Mbps
    OSPI
    2
    <100Mbps
    PRU-ICSS
    2
    Protocol dependent

    To provide a more tailored solution, please clarify the following with the customer:

    • Target Throughput: Is 300 Mbps a sustained throughput requirement or a burst rate?
    • Peer Device: What interface does the communicating device support?
    • Communication Type: Is point-to-point serial communication required, or is a packet-based interface (like Ethernet) acceptable?
    • System Constraints: What is the intended SYSCLK frequency and the physical layer requirements (distance, board space for PHY, etc.)?

    Best Regards,

    Zackary Fleenor