K60P100M100SF2RM Datasheet, PDF (1168/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Memory Map/Register Definition
44.3.37 Timer Correction Register (ENET_ATCOR)
Address: ENET_ATCOR is 400C_0000h base + 410h offset = 400C_0410h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0
W
COR
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ENET_ATCOR field descriptions
Field
31
Reserved
30–0
COR
Description
This read-only field is reserved and always has the value zero.
Correction counter wrap-around value
Defines after how many timer clock cycles (ts_clk) the correction counter should be reset and trigger a
correction increment on the timer. The amount of correction is defined in ATINC[INC_CORR]. A value of 0
disables the correction counter and no corrections occur.
NOTE: This value is given in clock cycles, not in nanoseconds as all other values.
44.3.38 Time-Stamping Clock Period Register (ENET_ATINC)
Address: ENET_ATINC is 400C_0000h base + 414h offset = 400C_0414h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0
W
0
INC_CORR
INC
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ENET_ATINC field descriptions
Field
31–15
Reserved
14–8
INC_CORR
7
Reserved
6–0
INC
Description
This read-only field is reserved and always has the value zero.
Correction increment value
This value is added every time the correction timer expires (every clock cycle given in ATCOR). A value
smaller than INC slows the timer, while a value larger than INC speeds the timer.
This read-only field is reserved and always has the value zero.
Clock period of the timestamping clock (ts_clk) in nanoseconds
The timer increments by this amount each clock cycle. For example, set to 10 for 100 MHz, 8 for 125
MHz, 5 for 200 MHz.
NOTE: For highest precision, use a value that is an integer fraction of the period set in ATPER.
1168
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.