mpc5604e Freescale Semiconductor, Inc, mpc5604e Datasheet - Page 30

• Manufacturer Part Number: mpc5604e
• Description: Mpc5604e Microcontroller Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical characteristics
3.8.3
The device implements a POR module to ensure correct power-up initialization, as well as three low voltage detectors to
monitor the V
3.9
The MPC5604E 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:
30
•
•
•
•
1
2
3
4
5
6
7
1
V
V
V
It is required by the device in internal voltage regulation mode only.
This capacitance value is driven by the constraints of the external voltage regulator that supplies the V
voltage. A typical value is in the range of 470 nF. This capacitance should be placed close to the device pin.
This value is acceptable to guarantee operation from 3.0 V to 3.6 V
External regulator and capacitance circuitry must be capable of providing I
in operating range.
In-rush current is seen only for short time during power-up and on standby exit (max 20 µs, depending on external
LV capacitances to be load)
The duration of the in-rush current depends on the capacitance placed on LV pins. BV decaps must be sized
accordingly. Refer to IMREG value for minimum amount of current to be provided in cc.
V
DDHVLVDMOK_H
DDHVLVDMOK_L
V
V
POR monitors V
LVDHV3 monitors V
LVDLVCOR monitors low voltage digital power domain
A POR 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 1.5 V. Associated POR
(or POR) signal is active low.
I
DD
DD
MLVDDOK_H
DD_BV
MLVDDOK_L
Symbol
V
V
Power Up/Down reset sequencing
_
PORUP
= 3.3 V ± 10%, T
PORH
Symbol
HV
DD_HV
Voltage monitor electrical characteristics
= 3.3V ± 10% T
CC D In-rush current on V
and the V
C
Table 13. Voltage regulator electrical characteristics (continued)
T Power-on reset threshold
P Supply for functional POR module
P
P V
P Digital supply low voltage detector high
P Digital supply low voltage detector low
DD_HV
power-up
A
V
Table 14. Low voltage monitor electrical characteristics
DD_HV
DD_HV
= 40 to 125 °C, unless otherwise specified
DD_LV
DD_HV
A
during the power-up phase to ensure device is maintained in a safe reset state
= –40 °C to T
6
low voltage detector low threshold
Preliminary—Subject to Change Without Notice
low voltage detector high threshold
voltage while device is supplied:
to ensure device reset below minimum functional supply
MPC5604E Microcontroller Data Sheet, Rev. 2
Parameter
A MAX
DD_BV
Parameter
, unless otherwise specified
during
Conditions
—
DD_BV
1
Conditions
T
A
while maintaining supply V
= 25°C
—
—
—
—
—
Min
—
1
Value
1.095
Typ
Min
Freescale Semiconductor
1.5
1.0
2.6
—
—
—
Value
1.185
Max
2.95
2.7
400
Max
—
—
—
DD_BV
7
DD_BV
Unit
Unit
mA
V
V
V
V
V
V