LAN9250 datasheet(349/421 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS00001913A-page 349

LAN9250

14.8.24

1588 PORT RX TIMESTAMP INSERTION CONFIGURATION REGISTER

(1588_RX_TS_INSERT_CONFIG)

This register is used to configure PTP message timestamp insertion.

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).

Offset:

160h

Size:

32 bits

Bank:

Bits

Description

Type

Default

31:18

RESERVED

RX PTP Insert Delay Request Egress in Delay Response Enable

(RX_PTP_INSERT_DREQ_DRESP_EN)

When this bit is set, the egress time of the last Delay_Req packet is inserted

into received Delay_Resp packets.

This bit has no affect if RX_PTP_INSERT_TS_EN is a low or if detection of

the Delay_Resp message type is not enabled.

R/W

RX PTP Bad UDP Checksum Force Error Disable

(RX_PTP_BAD_UDP_CHKSUM_FORCE_ERR_DIS)

When this bit is cleared, ingress packets that have an invalid UDP checksum

will have a receive symbol error forced if the packet is modified for timestamp

or correction field reasons.

When this bit is set, the UDP checksum check is bypassed.

Note:

The host S/W must not change this bit while the 1588 Enable

(1588_ENABLE) bit in 1588 Command and Control Register

(1588_CMD_CTL) is set.

R/W

RX PTP Insert Timestamp Seconds Enable

(RX_PTP_INSERT_TS_SEC_EN)

When RX_PTP_INSERT_TS_EN is set, this bit enables bits 3:0 of the sec-

onds portion of the receive ingress time to be inserted into the PTP message.

This bit has no affect if RX_PTP_INSERT_TS_EN is a low.

R/W

RESERVED

13:8

RX PTP Insert Timestamp Seconds Offset

(RX_PTP_INSERT_TS_SEC_OFFSET[5:0])

This field specifies the offset into the PTP header where the seconds portion

of the receive ingress time is inserted.

Note:

The host S/W must not change this field while the 1588 Enable

(1588_ENABLE) bit in 1588 Command and Control Register

(1588_CMD_CTL) is set.

R/W

000101b

RX PTP Insert Timestamp Enable (RX_PTP_INSERT_TS_EN)

When set, receive ingress times are inserted into the PTP message.

R/W

RESERVED

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