S9S12XS256J0CAL Datasheet, PDF (663/738 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Characteristics
The total power dissipation can be calculated from:
PD = PINT + PIO
PINT = Chip Internal Power Dissipation, [W]
∑ ^{PIO =} _i ^{RDSON ⋅ IIOi2}
P_IO is the sum of all output currents on I/O ports associated with V_DDX, whereby
RDSON = ^{V--I--O-O----L-L--;for} outputs driven low
RDSON = ^{V-----D----D-----3}_I--O-⁵----H^–-----V----O-----H---;for outputs driven high
Two cases with internal voltage regulator enabled and disabled must be considered:
1. Internal voltage regulator disabled
PINT = IDD ⋅ VDD + IDDPLL ⋅ VDDPLL + IDDA ⋅ VDDA
2. Internal voltage regulator enabled
PINT = IDDR ⋅ VDDR + IDDA ⋅ VDDA
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor
663