mpc5566 Freescale Semiconductor, Inc, mpc5566 Datasheet - Page 11

• Manufacturer Part Number: mpc5566
• Description: Mpc5566 High Performance Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

When powering down, V
capacitors internal and external to the device are already charged. When not powering up or down, no delta
between V
There are no power up/down sequencing requirements to prevent issues such as latch-up, excessive current
spikes, and so on. Therefore, the state of the I/O pins during power up and power down varies depending
on which supplies are powered.
Table 7
Table 8
pad_sh (slow type).
The values in
during power up.
Before exiting the internal POR state, the voltage on the pins goes to high-impedance until POR negates.
When the internal POR negates, the functional state of the signal during reset applies and the weak-pull
devices (up or down) are enabled as defined in the device Reference Manual. If V
propagate the logic signals, the weak-pull devices can pull the signals to V
To avoid this condition, minimize the ramp time of the V
required to enable the external circuitry connected to the device outputs.
Freescale Semiconductor
gives the pin state for the sequence cases for all pins with pad type pad_fc (fast type).
gives the pin state for the sequence cases for all pins with pad type pad_mh (medium type) and
RC33
Table 7
V
V
V
V
Table 8. Pin Status for Medium and Slow Pads During the Power Sequence
and V
Low
DDEH
DDEH
DDEH
DDEH
V
V
V
V
V
V
Low
DDE
DDE
DDE
DDE
DDE
DDE
DDSYN
and
Table 7. Pin Status for Fast Pads During the Power Sequence
V
Low
V
V
V
V
V
V
—
Low
Low
RC33
DD
DD
DD
DD33
DD33
DD33
DD33
—
Table 8
is required for the V
and V
Asserted
Asserted
Asserted
Negated
MPC5566 Microcontroller Data Sheet, Rev. 2.0
POR
V
Low
V
Low
V
V
—
do not include the effect of the weak-pull devices on the output pins
DD
DD
DD
DD
DDSYN
Asserted
Asserted
Asserted
Asserted
Asserted
Negated
POR
Pin Status for Medium and Slow Pad Output Driver
have no delta requirement to each other, because the bypass
RC
pad_mh (medium) pad_sh (slow)
to operate within specification.
Pin Status for Fast Pad Output Driver
High impedance (Hi-Z)
DD
High impedance (Hi-Z)
supply to a time period less than the time
Functional
Low
Hi-Z
pad_fc (fast)
Functional
High
High
Hi-Z
Low
DDE
and V
DD
Electrical Characteristics
is too low to correctly
DDEH
.
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