mcf51jm128 Freescale Semiconductor, Inc, mcf51jm128 Datasheet - Page 38

• Manufacturer Part Number: mcf51jm128
• Description: Mcf51jm128 Coldfire Microcontroller Flexis 32-bit V1 Coldfire? Usb Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1
Preliminary Electrical Characteristics
2.15
Electromagnetic compatibility (EMC) performance is highly dependant on the environment in which the MCU resides. Board
design and layout, circuit topology choices, location and characteristics of external components as well as MCU software
operation all play a significant role in EMC performance. The system designer should consult Freescale applications notes such
as AN2321, AN1050, AN1263, AN2764, and AN1259 for advice and guidance specifically targeted at optimizing EMC
performance.
2.15.1
Microcontroller radiated RF emissions are measured from 150 kHz to 1 GHz using the TEM/GTEM Cell method in accordance
with the IEC 61967-2 and SAE J1752/3 standards. The measurement is performed with the microcontroller installed on a
custom EMC evaluation board while running specialized EMC test software. The radiated emissions from the microcontroller
are measured in a TEM cell in two package orientations (North and East). For more detailed information concerning the
evaluation results, conditions and setup, please refer to the EMC Evaluation Report for this device.
The maximum radiated RF emissions of the tested configuration in all orientations are less than or equal to the reported
emissions levels.
2.15.2
Microcontroller transient conducted susceptibility is measured in accordance with an internal Freescale test method. The
measurement is performed with the microcontroller installed on a custom EMC evaluation board and running specialized EMC
test software designed in compliance with the test method. The conducted susceptibility is determined by injecting the transient
susceptibility signal on each pin of the microcontroller. The transient waveform and injection methodology is based on IEC
38
Radiated emissions,
electric field
Data based on qualification test results.
Parameter
EMC Performance
VREG Quiescent Current
Radiated Emissions
Conducted Transient Susceptibility
Vusb33 input with internal Vreg
Regulator operating voltage
Vreg output
Table 22. Internal USB 3.3V Voltage Regulator Characteristics
disabled
V
Symbol
RE_TEM
MCF51JM128 ColdFire Microcontroller, Rev. 0
Table 23. Radiated Emissions
package type
Conditions
V
T
A
64 LQFP
DD
= +25
= 5.5V
o
C
Symbol
V
V
V
usb33in
I
regout
VRQ
regin
500 – 1000 MHz
150 – 500 MHz
0.15 – 50 MHz
50 – 150 MHz
Frequency
SAE Level
IEC Level
Unit
mA
V
V
V
4 MHz crystal
24 MHz Bus
f
Min
OSC
3.9
—
3
3
/f
BUS
Typ
3.3
3.3
0.5
—
Freescale Semiconductor
Level
(Max)
TBD
TBD
TBD
TBD
TBD
TBD
Max
5.5
3.6
3.6
—
1
dBμV
Unit
—
—