RM0440 Rev 4 1283/2126
RM0440 General-purpose timers (TIM2/TIM3/TIM4/TIM5)
1343
Figure 415. Counter reading with index ungated (IPOS[1:0] = 00)
The Figure 416 below shows how the ‘gated on A & B’ mode is handled, for various pulse
alignment scenario. The arrows are indicating on which transition is the index event
generated.
Figure 416. Counter reading with index gated on channel A and B
The Figure 417 and Figure 418 detail the case where the subsequent index pulse may be
narrower than one quarter of the encoder clock period.
MSv45769V1
Channel A
Channel B
DIR bit
Index
Counter 3 4 5 6 7 0 1 2 3 4 3 2 1 0 7 6 5 4 3 2 1 0 7
MSv45770V1
Channel A
Channel B
DIR bit
Index
Counter
5 6 7 0 1 2 3 4 5 6 5 4 3 2 1 0 7 6 5 4 3 2 1
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