Electrical Characteristics
MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
723
The total power dissipation can be calculated from:
P
IO
is the sum of all output currents on I/O ports associated with V
DDX
, whereby
Two cases with internal voltage regulator enabled and disabled must be considered:
1. Internal voltage regulator disabled
2. Internal voltage regulator enabled
P
D
P
INT
P
IO
+
=
P
INT
Chip Internal Power Dissipation, [W]
=
P
IO
R
DSON
i
∑
I
IO
i
2
⋅
=
R
DSON
V
OL
I
OL
------------ for outputs driven low
;
=
R
DSON
V
DD
35
V
OH
–
I
OH
-------------------------------------- for outputs driven high
;
=
P
INT
I
DD
V
DD
⋅
I
DDPLL
V
DDPLL
⋅
I
DDA
+
V
DDA
⋅
+
=
P
INT
I
DDR
V
DDR
⋅
I
DDA
V
DDA
⋅
+
=
electronic components distributor