KSZ9563RNXI datasheet(111/226 Pages) MICROCHIP

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 2017-2018 Microchip Technology Inc.

DS00002419D-page 111

KSZ9563R

5.1.6.13

Global PTP Domain and Version Register

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

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

RESERVED

R/W

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

RESERVED

R/W

RESERVED

R/W

Address:

0x0518 - 0x0519

Size:

16 bits

Bits

Description

Type

Default

15:12

RESERVED

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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