K20P144M120SF3 Datasheet, PDF (21/80 Pages) Freescale Semiconductor, Inc – K20 Sub-Family Data Sheet

General
3. Specified according to Annex D of IEC Standard 61967-2, Measurement of Radiated Emissions—TEM Cell and Wideband
TEM Cell Method
5.2.7 Designing with radiated emissions in mind
To find application notes that provide guidance on designing your system to minimize
interference from radiated emissions:
1. Go to http://www.freescale.com.
2. Perform a keyword search for “EMC design.”
5.2.8 Capacitance attributes
Table 8. Capacitance attributes
Symbol
C_{IN_A}
C_{IN_D}
C_{IN_D_io60}
Description
Input capacitance: analog pins
Input capacitance: digital pins
Input capacitance: fast digital pins
Min.
Max.
Unit
—
7
pF
—
7
pF
—
9
pF
5.3 Switching specifications
5.3.1 Device clock specifications
Table 9. Device clock specifications
Symbol
f_SYS
f_{SYS_USBFS}
f_{SYS_USBHS}
f_BUS
FB_CLK
f_FLASH
f_LPTMR
f_SYS
Description
Normal run mode
System and core clock
System and core clock when Full Speed USB in
operation
System and core clock when High Speed USB in
operation
Bus clock
FlexBus clock
Flash clock
LPTMR clock
System and core clock
VLPR mode¹
Min.
—
20
60
—
—
—
—
—
Max.
120
—
—
60
50
25
25
4
Table continues on the next page...
K20 Sub-Family Data Sheet Data Sheet, Rev. 3, 2/2012.
Freescale Semiconductor, Inc.
Preliminary
Unit
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Notes
21