MKE02P64M20SF0 Datasheet, PDF (19/36 Pages) Freescale Semiconductor, Inc – Operating characteristics : Flash write voltage range: 2.7 to 5.5 V

Peripheral operating requirements and behaviors
The average chip-junction temperature (T_J) in °C can be obtained from:
T_J = T_A + (P_D × θ_JA)
Where:
T_A = Ambient temperature, °C
θ_JA = Package thermal resistance, junction-to-ambient, °C/W
P_D = P_int + P_I/O
P_int = I_DD × V_DD, Watts - chip internal power
P_I/O = Power dissipation on input and output pins - user determined
For most applications, P_I/O << P_int and can be neglected. An approximate relationship
between P_D and T_J (if P_I/O is neglected) is:
P_D = K ÷ (T_J + 273 °C)
Solving the equations above for K gives:
K = P_D × (T_A + 273 °C) + θ_JA × (P_D)²
where K is a constant pertaining to the particular part. K can be determined by measuring
P_D (at equilibrium) for an known T_A. Using this value of K, the values of P_D and T_J can
be obtained by solving the above equations iteratively for any value of T_A.
6 Peripheral operating requirements and behaviors
6.1 Core modules
6.1.1 SWD electricals
Table 9. SWD full voltage range electricals
Symbol
J1
Description
Operating voltage
SWD_CLK frequency of operation
• Serial wire debug
Min.
2.7
0
J2
SWD_CLK cycle period
1/J1
J3
SWD_CLK clock pulse width
20
Table continues on the next page...
Freescale Semiconductor, Inc.
KE02 Sub-Family Data Sheet, Rev3, 07/2013.
Max.
5.5
25
—
—
Unit
V
MHz
ns
ns
19