LAN9250 datasheet(324/421 Pages) MICROCHIP

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LAN9250

DS00001913A-page 324

 2015 Microchip Technology Inc.

14.8.3

1588 INTERRUPT STATUS REGISTER (1588_INT_STS)

This read/write register contains the 1588 interrupt status bits.

Writing a 1 to a interrupt status bits acknowledges and clears the individual interrupt. If enabled in the 1588 Interrupt

Enable Register (1588_INT_EN), these interrupt bits are cascaded into the 1588 Interrupt Event (1588_EVNT) bit of the

Interrupt Status Register (INT_STS). Status bits will still reflect the status of the interrupt source regardless of whether

the source is enabled as an interrupt. The 1588 Interrupt Event Enable (1588_EVNT_EN) bit of the Interrupt Enable

Interrupts," on page 62 for additional information.

Offset:

108h

Size:

32 bits

Bank:

Bits

Description

Type

Default

31:24

1588 GPIO Falling Edge Interrupt (1588_GPIO_FE_INT[7:0])

This interrupt indicates that a falling event occurred and the 1588 Clock was

captured.

Note:

As 1588 capture inputs, GPIO inputs are edge sensitive and must

be low for greater than 40 ns to be recognized as interrupt inputs.

These bits can also be set due to a manual capture via 1588 Manual Capture

(1588_MANUAL_CAPTURE).

R/WC

00h

23:16

1588 GPIO Rising Edge Interrupt (1588_GPIO_RE_INT[7:0])

This interrupt indicates that a rising event occurred and the 1588 Clock was

captured.

Note:

As 1588 capture inputs, GPIO inputs are edge sensitive and must

be high for greater than 40 ns to be recognized as interrupt inputs.

These bits can also be set due to a manual capture via 1588 Manual Capture

(1588_MANUAL_CAPTURE).

R/WC

00h

15:13

RESERVED

1588 TX Timestamp Interrupt (1588_TX_TS_INT)

This interrupt indicates that a PTP packet was transmitted and its egress time

stored. Up to four events, as indicated by the 1588 TX Timestamp Count

(1588_TX_TS_CNT[2:0]) field in the 1588 Port Capture Information Register

(1588_CAP_INFO), are buffered.

R/WC

11:9

RESERVED

1588 RX Timestamp Interrupt (1588_RX_TS_INT)

This interrupt indicates that a PTP packet was received and its ingress time

and associated data stored. Up to four events, as indicated by the 1588 RX

Timestamp Count (1588_RX_TS_CNT[2:0]) field in the 1588 Port Capture

Information Register (1588_CAP_INFO), are buffered.

R/WC

7:2

RESERVED

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