Figure 97. Update Event 1 Dependent Repetition Mechanism Example - Holtek HT32F50231 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F50231/HT32F50241
Repetition Down-counter Operation
The update event 1 is usually generated at each overflow or underflow event occurrence. However,
when the repetition operation is active by assigning a non-zero value into the REPR register, the
update event is only generated if the REPR counter has reached zero. The REPR value is decreased
when the following conditions occur:
▄
At each counter overflow in the up-counting mode
▄
At each counter underflow in the down-counting mode
▄
At each counter overflow and underflow in the center-aligned counting mode
CK_CNT
Up-Counting
CNTR
0 1 2
REPR
REPR Counter = 0
UEV1
Down-Counting
CNTR
3 2 1
REPR
REPR Counter = 0
UEV1
Center-Aligned-Counting
CK_CNT
CNTR 2 3 4 3 2
REPR
REPR Counter = 1
UEV1

Figure 97. Update Event 1 Dependent Repetition Mechanism Example

Rev. 1.00
3 4 5 0 1
REPR Counter = 1
0 3 2 1 0
REPR Counter = 2
1 0 1 2 3 4
REPR Counter = 0 REPR Counter = 1
302 of 486
2 3 4 5 0
1
3 2 1 0 3
2
REPR Counter = 1
3 2 1 0 1 2 3
1
REPR Counter = 1 REPR Counter = 0
REPR Counter = 0
1 2 3 4
REPR Counter = 0
2 1 0 3
REPR Counter = 0
4 3 2 1 0
July 31, 2018