ST STM32L152-EVAL - Figure 3. Power Supply Supervisors

Power supplies AN3216
10/30 Doc ID 17496 Rev 5
Figure 3. Power supply supervisors
1. The PVD is available on all STM32L devices and it is enabled or disabled by software.
2. The BOR is available only on devices operating from 1.8 to 3.6 V, and unless disabled by option byte it
masks the POR/PDR threshold.
3. When the BOR is disabled by option byte, the reset is asserted when V
DD
goes below PDR level.
4. For devices operating from 1.65 to 3.6 V, there is no BOR and the reset is released when V
DD
goes above
POR level and asserted when V
DD
goes below PDR level.
V
DD
/V
DDA
PVD output
100 mV
hys teresis
V
PVD
V
BOR
hys ter esis
100 mV
IT enabled
BOR reset
(NRST)
POR/PDR reset
(NR ST)
PVD
BOR always active
POR/PDR (BOR not available)
ai17211b
POR
V
/
PDR
V
BOR/PDR reset
(NRST)
BOR disabled by option byte
(Note 1)
(Note 2)
(Note 3)
(Note 4)