
42.5.6.4 Mode=11: 32-bit trigger capture mode
Case 1: TSOI=0, TROT=0, CHAIN=0 (TSOT=X)
-Proper clock selection can ensure that the timer does not rollover
more than once between 2 pulses
-Useful for determining duration between pulses
Mode1
1C
ase1
.s
vg
Operation:
-In Mode=11, the counter will load with 0xFFFF_FFFF,
and then decrement down to zero
-If a trigger rising edge is detected,
then it will store the inverse of the current counter in the load value register,
T_EN
IN_TRIG
PRE_TRIG_OUT
TRIG_OUT
Countdown
is based on the
selected clock
TSOT=X
TROT=0
TSOI=0
CHAIN=0
Timer resets
when T_EN=0
set the timer interrupt flag
1 clock
2 clocks
0xFFFF_FFFF
TMR_CUR_VAL
0x0000_0000
and assert the output pre-trigger and trigger
0xFFFF_FFFF
0x0000_0000
TMR_VAL
(read value)
Inverse value is
stored on trigger
Inverse value is
stored on trigger
Inverse value is
stored on trigger
Count value middle
Count value small
Count value big
TMR_VAL is in TVALn register
TMR_CUR_VAL is in CVALn register
Mode=11
Capture Mode
32-bit Trigger
Figure 42-16. Case 1: TSOT = X, TROT = 0, TSOI = 0, CHAIN = 0
Chapter 42 Low Power Interrupt Timer (LPIT)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors
1331
Содержание MWCT101 S Series
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