• Trigger Select (TRG_SEL) selects the input trigger for the channel from all of the
other channel's trigger outputs.
• Trigger Source (TRG_SRC) selects between the internal trigger and the external
trigger inputs to the channel.
The selected trigger affects how the timer operates, using the configuration of the TROT,
TSOI and TSOT bits.
Table 42-5. How bits control timer operations
If
=
Then
TSOI
Timer Stop On
Interrupt
1
then the counter stops on a Timer Interrupt flag (MSR[TIFn]) assertion. To reload and
decrement, it requires:
• a trigger (if TSOT = 1)
• a T_EN rising edge (if TSOT = 0)
0
then the counter does not stop after timeout
TROT
Timer Reload On
Trigger
1
then the counter is loaded on each trigger
0
then the counter is loaded on every T_EN rising edge or timeout rising edge (timeout not
used in Capture modes)
TSOT
Timer Start On
Trigger
1
then the counter will start to decrement on a trigger. Subsequent triggers are ignored until
the counter times out.
0
then the counter decrements immediately on the next clock edge. When channel is
Chained or in Capture mode, TSOT has no effect.
In different timer modes, these programmable bits affect the timer operation differently:
Table 42-6. Time modes and programmable bits
Mode
Which programmable bits affect timer operations
32-bit Periodic Counter All bits (TSOT, TSOI, TROT) affect the timer operation as described previously.
Dual 16-bit Periodic
Counter
32-bit Trigger
Accumulator
• Only the TSOI bit controls the timer function.
• TROT and TSOT bits have no effect on timer operations.
32-bit Input Trigger
Capture
• Only TSOI and TROT bits control the timer function.
• TSOT bit has no effect on timer operations.
42.5.5 Channel Chaining
Individual timer channels can be chained together to achieve a larger value of timeout.
Chaining the timer channel causes them to work in a 'nested loop' manner thereby leading
to an effective timeout value of TVAL
CHn
× (TVAL
CHn-1
+ 1).
Chapter 42 Low Power Interrupt Timer (LPIT)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors
1321
Содержание MWCT101 S Series
Страница 2: ...MWCT101xS Series Reference Manual Rev 3 07 2019 2 NXP Semiconductors...
Страница 42: ...MWCT101xS Series Reference Manual Rev 3 07 2019 42 NXP Semiconductors...
Страница 50: ...Conventions MWCT101xS Series Reference Manual Rev 3 07 2019 50 NXP Semiconductors...
Страница 70: ...Aliased bit band regions MWCT101xS Series Reference Manual Rev 3 07 2019 70 NXP Semiconductors...
Страница 78: ...Pinout diagrams MWCT101xS Series Reference Manual Rev 3 07 2019 78 NXP Semiconductors...
Страница 96: ...WCT101xS safety concept MWCT101xS Series Reference Manual Rev 3 07 2019 96 NXP Semiconductors...
Страница 130: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 130 NXP Semiconductors...
Страница 200: ...Initialization application information MWCT101xS Series Reference Manual Rev 3 07 2019 200 NXP Semiconductors...
Страница 284: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 284 NXP Semiconductors...
Страница 430: ...Functional Description MWCT101xS Series Reference Manual Rev 3 07 2019 430 NXP Semiconductors...
Страница 472: ...Application Information MWCT101xS Series Reference Manual Rev 3 07 2019 472 NXP Semiconductors...
Страница 508: ...Reset memory map and register descriptions MWCT101xS Series Reference Manual Rev 3 07 2019 508 NXP Semiconductors...
Страница 528: ...Module clocks MWCT101xS Series Reference Manual Rev 3 07 2019 528 NXP Semiconductors...
Страница 634: ...SRAM configuration MWCT101xS Series Reference Manual Rev 3 07 2019 634 NXP Semiconductors...
Страница 696: ...Initialization and application information MWCT101xS Series Reference Manual Rev 3 07 2019 696 NXP Semiconductors...
Страница 818: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 818 NXP Semiconductors...
Страница 960: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 960 NXP Semiconductors...
Страница 970: ...Memory Map and Register Definition MWCT101xS Series Reference Manual Rev 3 07 2019 970 NXP Semiconductors...
Страница 992: ...ADC calibration scheme MWCT101xS Series Reference Manual Rev 3 07 2019 992 NXP Semiconductors...
Страница 1118: ...Application information MWCT101xS Series Reference Manual Rev 3 07 2019 1118 NXP Semiconductors...
Страница 1294: ...Initialization Procedure MWCT101xS Series Reference Manual Rev 3 07 2019 1294 NXP Semiconductors...
Страница 1348: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 1348 NXP Semiconductors...
Страница 1366: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 1366 NXP Semiconductors...
Страница 1514: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 1514 NXP Semiconductors...
Страница 1726: ...Debug and security MWCT101xS Series Reference Manual Rev 3 07 2019 1726 NXP Semiconductors...
Страница 1740: ...Initialization application information MWCT101xS Series Reference Manual Rev 3 07 2019 1740 NXP Semiconductors...
Страница 1760: ...MWCT101xS Series Reference Manual Rev 3 07 2019 1760 NXP Semiconductors...