LAN9353 Datasheet, PDF (471/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
15.8.41 1588 PORT X TX EGRESS TIME NANOSECONDS REGISTER (1588_TX_EGRESS_NS_X)
Offset:
Bank:
170h
2
Size:
32 bits
This read only register combined with the 1588 Port x TX Egress Time Seconds Register (1588_TX_EGRESS_SEC_x)
contains the TX timestamp capture. Up to four captures are buffered.
Note: Values are only valid if the 1588 TX Timestamp Count (1588_TX_TS_CNT[2:0]) field indicates that at least
one timestamp is available.
Note:
Port and GPIO registers share a common address space. Port registers are selected by the Bank Select
(BANK_SEL[2:0] in the 1588 Bank Port GPIO Select Register (1588_BANK_PORT_GPIO_SEL). The port
accessed (“x”) is set by the Port Select (PORT_SEL[1:0]) field.
Bits
Description
31:30
29:0
RESERVED
Timestamp NanoSeconds (TS_NS)
This field contains the nanoseconds portion of the transmit egress time.
Type
RO
RO
Default
-
00000000h
 2015 Microchip Technology Inc.
DS00001925A-page 471