Register 43: Ethernet MAC System Time - Nanoseconds Update
(EMACTIMNANOU), offset 0x714
This register along with the EMACTIMSECU register initializes or updates the system time maintained
by the MAC. Both of these register must be written before setting the TSINIT or TSUPDT bits in the
EMACTIMSTCTRL register.
Ethernet MAC System Time - Nanoseconds Update (EMACTIMNANOU)
Base 0x400E.C000
Offset 0x714
Type RW, reset 0x0000.0000
16171819202122232425262728293031
TSSSADDSUB
RWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWType
0000000000000000Reset
0123456789101112131415
TSSS
RWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
Add or subtract time
DescriptionValue
The time value is added with the contents of the update register.0x0
The time value is subtracted with the contents of the update
register.
0x1
0x0RWADDSUB31
Timestamp Sub-Second
The value in this field has the sub-second representation of time, with
an accuracy of 0.46 ns. When DGTLBIN in the EMACTIMSTCTRL
register is set, each bit represents 1 ns and the programmed value
should not exceed 0x3B9A.C9FF.
0x0RWTSSS30:0
June 18, 20141542
Texas Instruments-Production Data
Ethernet Controller
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