MPC5602P Microcontroller Data Sheet, Rev. 4.1
Freescale Semiconductor
44
3.8.2
Voltage monitor electrical characteristics
The device implements a power on reset module to ensure correct power-up initialization, as well as three low voltage detectors
to monitor the VDD and the VDD_LV voltage while device is supplied:
POR monitors VDD during the power-up phase to ensure device is maintained in a safe reset state
LVDHV3 monitors VDD to ensure device reset below minimum functional supply
LVDHV5 monitors VDD when application uses device in the 5.0 V ± 10% range
LVDLVCOR monitors low voltage digital power domain
3.9
Power up/down sequencing
To prevent an overstress event or a malfunction within and outside the device, the MPC5602P implements the following
sequence to ensure each module is started only when all conditions for switching it ON are available:
A POWER_ON module working on voltage regulator supply controls the correct start-up of the regulator. This is a
key module ensuring safe configuration for all voltage regulator functionality when supply is below 1.5 V. Associated
POWER_ON (or POR) signal is active low.
CDEC2
SR — External decoupling/stability
ceramic capacitor
Four capacitances of 440 nF
each
1200 1760
—
nF
CDEC3
SR — External decoupling/stability
ceramic capacitor on
VDD_HV_REG
Two capacitances of 10 F
each
2 × 10
—
F
Table 14. Low voltage monitor electrical characteristics
Symbol
C
Parameter
Conditions1
1 VDD = 3.3 V ± 10% / 5.0 V ± 10%, TA = 40 °C to TA MAX, unless otherwise specified
Value
Unit
Min
Max
VPORH
T Power-on reset threshold
—
1.5
2.7
V
VPORUP
P Supply for functional POR module
TA = 25 °C
1.0
—
V
VREGLVDMOK_H
P Regulator low voltage detector high threshold
—
2.95
V
VREGLVDMOK_L
P Regulator low voltage detector low threshold
—
2.6
—
V
VFLLVDMOK_H
P Flash low voltage detector high threshold
—
2.95
V
VFLLVDMOK_L
P Flash low voltage detector low threshold
—
2.6
—
V
VIOLVDMOK_H
P I/O low voltage detector high threshold
—
2.95
V
VIOLVDMOK_L
P I/O low voltage detector low threshold
—
2.6
—
V
VIOLVDM5OK_H
P I/O 5 V low voltage detector high threshold
—
4.4
V
VIOLVDM5OK_L
P I/O 5 V low voltage detector low threshold
—
3.8
—
V
VMLVDDOK_H
P Digital supply low voltage detector high
—
1.145
V
VMLVDDOK_L
P Digital supply low voltage detector low
—
1.08
—
V
Table 13. Voltage regulator electrical characteristics (continued)
Symbol
C
Parameter
Conditions
Value
Unit
Min
Typ Max