Datasheet

DP83640
SNOSAY8E –SEPTEMBER 2007–REVISED APRIL 2013 www.ti.com
10.7.12 PTP Receive Hash Register (PTP_RXHASH), Page 6
This register provides configuration for the source identity hash filter of the PTP receive packet parser. If
enabled, the receive parse logic will deliver a receive timestamp only if the hash function on the ten octet
sourcePortIdentity field correctly matches the programmed value. The source identity hash filter does not
affect timestamp insertion.
Table 10-75. PTP Receive Hash Register (PTP_RXHASH), address 0x1F
Bit Bit Name Default Description
15:1 RESERVED 000, RO Reserved: Writes ignored, Read as 0
3
12 RX_HASH_EN 0, RW Receive Hash Enable:
Enables filtering of PTP messages based on the hash function on the ten octet
sourcePortIdentity field.
11:0 PTP_RX_HASH 0000 0000 0000, Receive Hash:
RW This field contains the expected source identity hash value for incoming PTP event
messages.
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