MPC5604PFF0MLL7R datasheet(36/84 Pages) FREESCALE

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MPC5604P Microcontroller Data Sheet, Rev. 5

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

•

LVDHV3 monitors VDD to ensure device reset below minimum functional supply

•

LVDHV5 monitors VDD when application uses device in the 5.0V ± 10% range

•

LVDLVCOR monitors low voltage digital power domain

3.7

Power up/down sequencing

The MPC5604P implements a precise sequence to ensure each module is started only when all conditions for switching it ON

are available. This prevents overstress event or miss-functionality within and outside the device:

•

a POWER_ON module working on voltage regulator supply is controlling the correct start-up of the regulator. This is

a key module ensuring safe configuration for all Voltage regulator functionality when supply is below 1.5V. Associated

POWER_ON (or POR) signal is active low.

•

Several Low Voltage Detectors, working on voltage regulator supply are monitoring the voltage of the critical modules

(Voltage regulator, I/Os, Flash and Low voltage domain). LVDs are gated low when POWER_ON is active.

•

a POWER_OK signal is generated when all critical supplies monitored by the LVD are available. This signal is active

high and released to all modules including I/Os, Flash and RC16 oscillator needed during power-up phase and reset

phase. When POWER_OK is low the associated module are set into a safe state.

Table 15. Low voltage monitor electrical characteristics

Symbol

Parameter

Conditions1

1 V

DD = 3.3V ± 10% / 5.0V ± 10%, TA = –40 to 125°C, unless otherwise specified

Value

Unit

Min

Max

VPORH

Power-on reset threshold

—

1.5

2.7

VPORUP

Supply for functional POR module

TA = 25°C

1.0

—

VREGLVDMOK_H

Regulator low voltage detector high threshold

—

2.95

VREGLVDMOK_L

Regulator low voltage detector low threshold

—

2.6

—

VFLLVDMOK_H

Flash low voltage detector high threshold

—

2.95

VFLLVDMOK_L

Flash low voltage detector low threshold

—

2.6

—

VIOLVDMOK_H

I/O low voltage detector high threshold

—

2.95

VIOLVDMOK_L

I/O low voltage detector low threshold

—

2.6

—

VIOLVDM5OK_H

I/O 5V low voltage detector high threshold

—

4.4

VIOLVDM5OK_L

I/O 5V low voltage detector low threshold

—

3.8

—

VMLVDDOK_H

Digital supply low voltage detector high

—

1.14

VMLVDDOK_L

Digital supply low voltage detector low

—

1.08

—

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