Appendix A Electrical Characteristics
MC9S12XE-Family Reference Manual , Rev. 1.19
1214
Freescale Semiconductor
A.1.10
Supply Currents
This section describes the current consumption characteristics of the device family as well as the
conditions for the measurements.
NOTE
Supply current values for smaller derivates are lower than for Sailfish
and shall be added at a later date. Currently the specified values are valid
for all S12XE-Family devices until more accurate derivative data is
available.
A.1.10.1
Typical Run Current Measurement Conditions
Since the current consumption of the output drivers is load dependent, all measurements are without output
loads and with minimum I/O activity. The currents are measured in single chip mode, S12XCPU code is
executed from Flash and XGATE code is executed from RAM. V
DD35
=5V, internal voltage regulator is
enabled and the bus frequency is 50MHz using a 4-MHz oscillator in loop controlled Pierce mode.
Furthermore in expanded modes the currents flowing in the system are highly dependent on the load at the
address, data, and control signals as well as on the duty cycle of those signals. No generally applicable
numbers can be given. A very good estimate is to take the single chip currents and add the currents due to
the external loads.
Since the DBG and BDM modules are typically not used in the end application, the supply current values
for these modules is not specified.
An overhead of current consumption exisits independent of the listed modules, due to voltage regulation
and clock logic that is not dedicated to a specific module. This is listed in the table row named “overhead”.
A.1.10.2
Maximum Run Current Measurement Conditions
Currents are measured in single chip mode, S12XCPU and XGATE code is executed from RAM with
V
DD35
=5.5V, internal voltage regulator enabled and a 50MHz bus frequency from a 4-MHz input.
Characterized parameters are derived using a 4MHz loop controlled Pierce oscillator. Production test
parameters are tested with a 4MHz square wave oscillator.
Table A-9. Characteristics of Expantion Bus Inputs Port C, D, PE5, PE6, and PE7
for Reduced Input Voltage Thresholds
Conditions are 4.5 V < V
DD35
< 5.5 V Temperature from –40
°
C to +150
°
C, unless otherwise noted
Num
C
Rating
Symbol
Min
Typ
Max
Unit
1
D Input high voltage
VIH
1.75
—
—
V
2
D Input low voltage
VIL
—
—
0.75
V
3
T Input hysteresis
VHYS
—
100
—
mV
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages
