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LAN9250 Datasheet(PDF) 333 Page - Microchip Technology |
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LAN9250 Datasheet(HTML) 333 Page - Microchip Technology |
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333 / 421 page  2015 Microchip Technology Inc. DS00001913A-page 333 LAN9250 14.8.11 1588 CLOCK STEP ADJUSTMENT REGISTER (1588_CLOCK_STEP_ADJ) This register is used to perform a one-time adjustment to either the seconds portion or the nanoseconds portion of the 1588 Clock. The amount and direction can be specified. Offset: 128h Size: 32 bits Bank: na Bits Description Type Default 31 Clock Step Adjustment Direction (1588_CLOCK_STEP_ADJ_DIR) This field specifies if the Clock Step Adjustment Value (1588_CLOCK_- STEP_ADJ_VALUE) is added to or subtracted from the 1588 Clock. 0 = subtracted 1 = added Note: Only addition is supported for the nanoseconds portion of the 1588 Clock R/W 0b 30 RESERVED RO - 29:0 Clock Step Adjustment Value (1588_CLOCK_STEP_ADJ_VALUE) When the nanoseconds portion of the 1588 Clock is being adjusted, this field specifies the amount to add. This is in lieu of the normal 9, 10 or 11 ns incre- ment. When the seconds portion of the 1588 Clock is being adjusted, the lower 4 bits of this field specify the amount to add to or subtract. R/W 00000000h |
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