gmacgrp_system_time_nanoseconds_update

         Update system time
      
Module Instance Base Address Register Address
i_emac_emac0 0xFF800000 0xFF800714
i_emac_emac1 0xFF802000 0xFF802714
i_emac_emac2 0xFF804000 0xFF804714

Size: 32

Offset: 0x714

Access: RW

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

addsub

RW 0x0

tsss

RW 0x0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

tsss

RW 0x0

gmacgrp_system_time_nanoseconds_update Fields

Bit Name Description Access Reset
31 addsub
When this bit is set, the time value is subtracted with the contents of the update register. When this bit is reset, the time value is added with the contents of the update register.
Value Description
0x0 DISABLED
0x1 ENABLED
RW 0x0
30:0 tsss
The value in this field has the sub second representation of time, with an accuracy of 0.46 ns. When bit 9 (TSCTRLSSR) is set in Register 448 (Timestamp Control Register), each bit represents 1 ns and the programmed value should not exceed 0x3B9A_C9FF.
RW 0x0