Cypress S6J3200 Series, Manual

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CHAPTER 21:Ethernet MAC
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G 687
4.33.
IEEE 1588 Timer Comparison Value Nanoseconds Register
(ETHERNETn_tsu_nsec_cmp)
Description of IEEE 1588 Timer Comparison Value Nanoseconds register is shown.
REGISTER_NAME ETHERNETn_tsu_nsec_cmp
OFFSET 0x0DC
ACCESS_SIZE W
MULTIPLE
NUMERIC_TYPE
OTHER
BIT_OFFSET 31 30 29 28 27 26 25 24
BIT_NAME Reserved
ACCESS_TYPE R0,WX
PROT_TYPE Wp
INITIAL_VALUE 0x00
BIT_OFFSET 23 22 21 20 19 18 17 16
BIT_NAME Reserved comparison_value[21:16]
ACCESS_TYPE R0,WX R/W
PROT_TYPE Wp
INITIAL_VALUE 0x0 0x00
BIT_OFFSET 15 14 13 12 11 10 9 8
BIT_NAME comparison_value[15:8]
ACCESS_TYPE R/W
PROT_TYPE Wp
INITIAL_VALUE 0x00
BIT_OFFSET 7 6 5 4 3 2 1 0
BIT_NAME comparison_value[7:0]
ACCESS_TYPE R/W
PROT_TYPE Wp
INITIAL_VALUE 0x00
[bit31:22] Reserved
Always read "0". Writing has no effect.
[bit21:0] comparison_value: IEEE 1588 Timer comparison value nanoseconds [21:0]
The register value is compared to bits [45:24] of the IEEE 1588 Timer count value (upper 22 bits of
nanosecond value).