Lptim Interrupts; Lptim Registers; Lptim Interrupt And Status Register (Lptim_Isr); Table 76. Interrupt Events - ST STM32F410 Reference Manual

RM0401
18.6

LPTIM interrupts

The following events generate an interrupt/wake-up event, if they are enabled through the
LPTIM_IER register:
•
Compare match
•
Auto-reload match (whatever the direction if encoder mode)
•
External trigger event
•
Autoreload register write completed
•
Compare register write completed
•
Direction change (encoder mode), programmable (up / down / both).
Note: If any bit in the LPTIM_IER register (Interrupt Enable Register) is set after that its
corresponding flag in the LPTIM_ISR register (Status Register) is set, the interrupt is not
asserted.
Interrupt event
Compare match
Auto-reload match
External trigger event
Auto-reload register
update OK
Compare register
update OK
Direction change
18.7

LPTIM registers

18.7.1

LPTIM interrupt and status register (LPTIM_ISR)

Address offset: 0x000
Reset value: 0x0000 0000
31 30 29
Res. Res. Res. Res.
15 14 13
Res. Res. Res. Res.
Interrupt flag is raised when the content of the Counter register
(LPTIM_CNT) matches the content of the compare register (LPTIM_CMP).
Interrupt flag is raised when the content of the Counter register
(LPTIM_CNT) matches the content of the Auto-reload register
(LPTIM_ARR).
Interrupt flag is raised when an external trigger event is detected
Interrupt flag is raised when the write operation to the LPTIM_ARR register
is complete.
Interrupt flag is raised when the write operation to the LPTIM_CMP register
is complete.
Used in Encoder mode. Two interrupt flags are embedded to signal
direction change:
– UP flag signals up-counting direction change
– DOWN flag signals down-counting direction change.
28 27 26 25
Res. Res. Res.
12 11 10 9
Res. Res. Res.

Table 76. Interrupt events

Description
24 23 22
Res. Res. Res.
8 7 6
Res. Res. DOWN
r
RM0401 Rev 3
Low-power timer (LPTIM)
21 20 19 18
Res. Res. Res. Res.
5 4 3 2
ARRO CMP EXTTR
UP
K OK IG
r r r r
17 16
Res. Res.
1 0
ARRM CMPM
r r
461/771
472