MPC5553EVBISYS Freescale Semiconductor, MPC5553EVBISYS Datasheet - Page 12

• Manufacturer Part Number: MPC5553EVBISYS
• Description: KIT EVAL ISYSTEMS MPC5553
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC5553EVBISYS

• Contents: Eval Board and Demo Software
• Processor To Be Evaluated: MPC55xx
• Data Bus Width: 32 bit
• Interface Type: RS-232, Ethernet
• Core Architecture: Power
• For Use With/related Products: MPC5553
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Electrical Characteristics
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.
3.7.1
When powering up the device, V
more than the V
bypass clock mode because the internal versions of PLLCFG[0:1] and RSTCFG are not powered and
therefore cannot read the default state when POR negates. V
pin (V
applies during power up only. V
3.7.2
The 1.5 V V
power supply rises above 2.0 V. This ensures that digital logic in the PLL for the 1.5 V power supply does
not begin to operate below the specified operation range lower limit of 1.35 V. Because the internal 1.5 V
POR is disabled, the internal 3.3 V POR or the RESET power POR must hold the device in reset. Since
they can negate as low as 2.0 V, V
POR negate.
12
DDEH6
gives the pin state for the sequence cases for all pins with pad type pad_mh (medium type) and
Input Value of Pins During POR Dependent on V
Power-Up Sequence (V
DD
), but cannot lag both by more than the V
Table 7
V
V
V
V
power supply must rise to 1.35 V before the 3.3 V V
Table 8. Pin Status for Medium and Slow Pads During the Power Sequence
Low
DDEH
DDEH
DDEH
DDEH
DD33
lag specification listed in
and
V
Low
V
V
—
DD
DD
DD
Table 8
Asserted
Asserted
Asserted
Negated
DD33
MPC5553 Microcontroller Data Sheet, Rev. 3.0
DD33
POR
DD
do not include the effect of the weak-pull devices on the output pins
has no lead or lag requirements when powering down.
must be within specification before the 3.3 V POR and the RESET
must not lag the latest V
Pin Status for Medium and Slow Pad Output Driver
RC33
Table
Grounded)
pad_mh (medium) pad_sh (slow)
DD33
6, spec 8. This avoids accidentally selecting the
High impedance (Hi-Z)
DD
lag specification. This V
DD33
supply to a time period less than the time
Functional
DDSYN
Low
Hi-Z
can lag V
DDSYN
or RESET power pin (V
DDE
power supply and the RESET
DDSYN
DD33
and V
DD
DD33
or the RESET power
is too low to correctly
Freescale Semiconductor
DDEH
lag specification
.
DDEH6
) by