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KSZ9563RNXC 数据表(PDF) 111 Page - Microchip Technology |
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KSZ9563RNXC 数据表(HTML) 111 Page - Microchip Technology |
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111 / 226 page  2017-2018 Microchip Technology Inc. DS00002419D-page 111 KSZ9563R 5.1.6.13 Global PTP Domain and Version Register 5 Enable Dropping of Sync/Follow_Up and Delay_Req PTP Messages Setting this bit will enable the device to automatically drop these Sync/ Follow_up and Delay_Req PTP messages if the Best Master Clock (BMC) is not determined. R/W 0b 4 Enable Checking of Domain Field Setting this bit will enable the device to automatically check the domain field of the PTP message with the PTP_DOMAIN in the Global PTP Domain and Version Register. The PTP message will be forwarded to the host port if the domain field matches. Otherwise it will be dropped. R/W 0b 3 RESERVED R/W 0b 2 Enable IPv4/UDP Checksum Calculation for Egress Packets 1 = The switch will re-calculate and generate a 2-byte checksum value when the frame content changes. 0 = The checksum field is set to zero. If the IPv4/UDP checksum is zero, the checksum will remain zero regardless of this bit setting. For IPv6/UDP, the checksum is always updated. R/W 1b 1 RESERVED R/W 0b 0 RESERVED R/W 0b Address: 0x0518 - 0x0519 Size: 16 bits Bits Description Type Default 15:12 RESERVED RO 0x0 11:8 PTP Version This is the value of the PTP message version number field. All PTP messages will be captured when the receive message version matches the value in this field. All PTP packets will be dropped if the receive PTP message version does not match the value in this field, except for R/W 0x2 7:0 PTP Domain This is the value of the PTP message domain number field. If domain checking is enabled (Global PTP Message Config 2 Register, bit 4), the timestamp capture will be enabled when the receive PTP message domain number matches the value in this field. If domain checking is not enabled, the domain number field will be ignored. R/W 0x00 Bits Description Type Default |
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