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LAN9250 Datasheet(PDF) 330 Page - Microchip Technology

Part # LAN9250
Description  Integrated Ethernet PHY with HP Auto-MDIX
PDF  421 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9250 Datasheet(HTML) 330 Page - Microchip Technology

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LAN9250
DS00001913A-page 330
 2015 Microchip Technology Inc.
14.8.8
1588 CLOCK RATE ADJUSTMENT REGISTER (1588_CLOCK_RATE_ADJ)
This register is used to adjust the rate of the 1588 Clock. Every 10 ns, 1588 Clock is normally incremented by 10 ns.
This register is used to occasionally change that increment to 9 or 11 ns.
Offset:
11Ch
Size:
32 bits
Bank:
na
Bits
Description
Type
Default
31
Clock Rate Adjustment Direction (1588_CLOCK_RATE_ADJ_DIR)
This field specifies if the 1588 Rate Adjustment causes the 1588 Clock to be
faster or slower than the reference clock.
0 = slower (1588 Clock increments by 9 ns)
1 = faster (1588 Clock increments by 11 ns)
R/W
0b
30
RESERVED
RO
-
29:0
Clock Rate Adjustment Value (1588_CLOCK_RATE_ADJ_VALUE)
This field indicates an adjustment to the reference clock period of the 1588
Clock in units of 2-32ns. On each 10 ns reference clock cycle, this value is
added to the 32-bit sub-nanoseconds portion of the 1588 Clock. When the
sub-nanoseconds portion wraps around to zero, the 1588 Clock will be
adjusted by 1ns.
R/W
00000000h



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