LAN9250 datasheet(335/421 Pages) MICROCHIP

335 / 421 page

 2015 Microchip Technology Inc.

DS00001913A-page 335

LAN9250

14.8.13

1588 CLOCK TARGET X NANOSECONDS REGISTER (1588_CLOCK_TARGET_NS_X)

This read/write register combined with 1588 Clock Target x Seconds Register (1588_CLOCK_TARGET_SEC_x) form

the 1588 Clock Target value. The 1588 Clock Target value is compared to the current 1588 Clock value and can be used

to trigger an interrupt upon at match. Refer to Section 14.4, "1588 Clock Events" for additional information.

Note:

Both this register and the 1588 Clock Target x Seconds Register (1588_CLOCK_TARGET_SEC_x) must

be written for either to be affected.

Note:

The value read is the saved value of the 1588 Clock Target when the Clock Target Read

(1588_CLOCK_TARGET_READ) bit in the 1588 Command and Control Register (1588_CMD_CTL) is set.

Note:

When the Clock Target Read (1588_CLOCK_TARGET_READ) bit is set, the previous value written to this

and the 1588 Clock Target x Seconds Register (1588_CLOCK_TARGET_SEC_x).

Offset:

Channel A: 130h

Size:

32 bits

Channel B: 140h

Bank:

Channel A: na

Channel B: na

Bits

Description

Type

Default

31:30

RESERVED

29:0

Clock Target NanoSeconds (CLOCK_TARGET_NS)

This field contains the nanoseconds portion of the 1588 Clock Compare

value.

R/W

00000000h

LAN9250 Datasheet(PDF) 335 Page - Microchip Technology