5.1.3.1 EMC radiated emissions operating behaviors
Table 5. EMC radiated emissions operating behaviors for 20-pin SOIC package
Symbol Description Frequency
band (MHz)
Typ. Unit Notes
V
RE1
Radiated emissions voltage, band 1 0.15–50 7 dBμV 1, 2
V
RE2
Radiated emissions voltage, band 2 50–150 9 dBμV
V
RE3
Radiated emissions voltage, band 3 150–500 8 dBμV
V
RE4
Radiated emissions voltage, band 4 500–1000 5 dBμV
V
RE_IEC
IEC level 0.15–1000 N — 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
SYS
= 20 MHz, 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 6. Control timing
Num C Rating Symbol Min Typical
1
Max Unit
1 P Bus frequency (t
cyc
= 1/f
Bus
) f
Bus
DC — 20 MHz
2 P Internal low power oscillator frequency f
LPO
0.67 1.0 1.25 KHz
3 D External reset pulse width
2
t
extrst
1.5 ×
t
cyc
— — ns
4 D Reset low drive t
rstdrv
34 × t
cyc
— — ns
5 D BKGD/MS setup time after issuing background
debug force reset to enter user or BDM modes
t
MSSU
500 — — ns
6 D BKGD/MS hold time after issuing background
debug force reset to enter user or BDM modes
3
t
MSH
100 — — ns
7 D IRQ pulse width Asynchronous
path
2
t
ILIH
100 — — ns
D Synchronous path
4
t
IHIL
1.5 × t
cyc
— — ns
8 D Keyboard interrupt pulse
width
Asynchronous
path
2
t
ILIH
100 — — ns
D Synchronous path t
IHIL
1.5 × t
cyc
— — ns
9 C Port rise and fall time -
standard drive strength
(load = 50 pF)
5
— t
Rise
— 10.2 — ns
C t
Fall
— 9.5 — ns
Table continues on the next page...
5.2
Switching specifications
MC9S08PA4 Data Sheet, Rev. 8, 08/2018
NXP Semiconductors 15