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V
V
V
V
DD_xxx
V
LVD(fall)
HVD TRIGGER
LVD TRIGGER
VDRELEASE
LVD(rise)
t
t
t
VDASSERT
HVD(fall)
HVD(rise)
VDRELEASE
t
VDASSERT
(INTERNAL)
(INTERNAL)
Figure 20. Voltage monitor threshold definition
For V
DD_LV
levels, a maximum of 30 mV IR drop is incurred from the pin to all sinks on
the die. For other LVD, the IR drop is estimated by multiplying the supply current by 0.5
ohm.
LVD is released after t
VDRELEASE
temporization when upper threshold is crossed, LVD is
asserted t
VDASSERT
after detection when lower threshold is crossed.
HVD is released after t
VDRELEASE
temporization when lower threshold is crossed, HVD
is asserted t
VDASSERT
after detection when upper threshold is crossed.
Table 29. Voltage monitor electrical characteristics
Symbol
Parameter
Conditions
Configuration
Value
Unit
Trim
bits
Mas
k
Opt.
Pow
. Up
Min
Typ Max
POR085_c
LV internal supply power on
reset
Rising voltage (power up)
N/A
No Enab
.
870
920
970
mV
Falling voltage (power down)
850
900
950
Table continues on the next page...
Power management PMC POR LVD sequencing
SPC5746R Microcontroller Data Sheet, Rev. 6, 06/2017
52
NXP Semiconductors