Freescale Semiconductor *KE02 Series, Technical Data Manual

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5.1.3.1 EMC radiated emissions operating behaviors
Table 6. EMC radiated emissions operating behaviors for 64-pin QFP
package
Symbol Description Frequency
band (MHz)
Typ. Unit Notes
V
RE1
Radiated emissions voltage, band 1 0.15–50 14 dBμV 1 , 2
V
RE2
Radiated emissions voltage, band 2 50–150 15 dBμV
V
RE3
Radiated emissions voltage, band 3 150–500 3 dBμV
V
RE4
Radiated emissions voltage, band 4 500–1000 4 dBμV
V
RE_IEC
IEC level 0.15–1000 M — 2 , 3
1. Determined according to IEC Standard 61967-1, Integrated Circuits - Measurement of Electromagnetic Emissions, 150
kHz to 1 GHz Part 1: General Conditions and Definitions and IEC Standard 61967-2, Integrated Circuits - Measurement of
Electromagnetic Emissions, 150 kHz to 1 GHz Part 2: Measurement of Radiated Emissions—TEM Cell and Wideband
TEM Cell Method
. Measurements were made while the microcontroller was running basic application code. The reported
emission level is the value of the maximum measured emission, rounded up to the next whole number, from among the
measured orientations in each frequency range.
2. V
DD
= 5.0 V, T
A
= 25 °C, f
OSC
= 10 MHz (crystal), f
BUS
= 20 MHz
3. Specified according to Annex D of IEC Standard 61967-2, Measurement of Radiated Emissions—TEM Cell and Wideband
TEM Cell Method
Switching specifications
5.2.1 Control timing
Table 7. Control timing
Num C Rating Symbol Min Typical
1
Max Unit
1 D System and core clock f
Sys
DC — 20 MHz
2 P Bus frequency (t
cyc
= 1/f
Bus
) f
Bus
DC — 20 MHz
3 P Internal low power oscillator frequency f
LPO
0.67 1.0 1.25 KHz
4 D External reset pulse width
2
t
extrst
1.5 ×
t
cyc
— — ns
5 D Reset low drive t
rstdrv
34 × t
cyc
— — ns
6 D IRQ pulse width Asynchronous
path
2
t
ILIH
100 — — ns
D Synchronous path
3
t
IHIL
1.5 × t
cyc
— — ns
7 D Keyboard interrupt pulse
width
Asynchronous
path
2
t
ILIH
100 — — ns
D Synchronous path t
IHIL
1.5 × t
cyc
— — ns
8 C Port rise and fall time -
Normal drive strength
(load = 50 pF)
4
— t
Rise
— 10.2 — ns
C t
Fall
— 9.5 — ns
C Port rise and fall time -
high drive strength (load =
50 pF)
4
— t
Rise
— 5.4 — ns
C t
Fall
— 4.6 — ns
5.2
Switching specifications
KE02 Sub-Family Data Sheet, Rev4, 10/2014.
16 Freescale Semiconductor, Inc.