MPC5601PEF0MLL4R datasheet(44/95 Pages) FREESCALE

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MPC5602P Microcontroller Data Sheet, Rev. 4.1

Freescale Semiconductor

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

—

CDEC3

SR — External decoupling/stability

ceramic capacitor on

VDD_HV_REG

Two capacitances of 10 µF

each

2 × 10

—

µF

Table 14. Low voltage monitor electrical characteristics

Symbol

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

VPORUP

P Supply for functional POR module

TA = 25 °C

1.0

—

VREGLVDMOK_H

P Regulator low voltage detector high threshold

—

2.95

VREGLVDMOK_L

P Regulator low voltage detector low threshold

—

2.6

—

VFLLVDMOK_H

P Flash low voltage detector high threshold

—

2.95

VFLLVDMOK_L

P Flash low voltage detector low threshold

—

2.6

—

VIOLVDMOK_H

P I/O low voltage detector high threshold

—

2.95

VIOLVDMOK_L

P I/O low voltage detector low threshold

—

2.6

—

VIOLVDM5OK_H

P I/O 5 V low voltage detector high threshold

—

4.4

VIOLVDM5OK_L

P I/O 5 V low voltage detector low threshold

—

3.8

—

VMLVDDOK_H

P Digital supply low voltage detector high

—

1.145

VMLVDDOK_L

P Digital supply low voltage detector low

—

1.08

—

Table 13. Voltage regulator electrical characteristics (continued)

Symbol

Parameter

Conditions

Value

Unit

Min

Typ Max

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