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C6455 EVM has a Gigabit EMAC. Does the hardware support Jumbo Packets?

April 26, 2017emac evm Gigabit hardware Jumbo packets support

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C6455 EVM has a Gigabit EMAC. Does the hardware support Jumbo Packets?

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The EMAC peripheral in C6455 Mezzanine card supports packets up to 65536 bytes (16-bit). This board has a Broadcom BCM5464 external PHY connected in RGMII mode. The EMAC on this device has an internal memory buffer that can hold up to 8 kB, but L2 memory can also be used. Please see section 2.2 of the EMAC peripheral User’s Guide for C6455 (spru975). Apart from this, the SW Operation of Gigabit Ethernet Media Access Controller on TMS320C645x DSP (spraa90) describes in detail the support of jumbo packets on the C6455. It has an entire description of the system and sections 6.3 and 6.4 contain considerations about the available buffer sizes and even PHY limitations.