MC9S12DG128 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MC9S12DG128' PDF : 142 Pages View PDF
Device User Guide — 9S12DT128DGV2/D V02.16
PD = Total Chip Power Dissipation, [W]
ΘJA = Package Thermal Resistance, [°C/W]
The total power dissipation can be calculated from:
PD = PINT + PIO
PINT = Chip Internal Power Dissipation, [W]
Two cases with internal voltage regulator enabled and disabled must be considered:
1. Internal Voltage Regulator disabled
PINT = IDD ⋅ VDD + IDDPLL ⋅ VDDPLL + IDDA ⋅ VDDA
∑ PIO = i RDSON ⋅ IIOi2
Which is the sum of all output currents on I/O ports associated with VDDX and VDDR.
For RDSON is valid:
RDSON = V--I--O-O----L-L- ;for outputs driven low
respectively
RDSON = -V----D----D----I-5-O----–-H---V-----O-----H-- ;for outputs driven high
2. Internal voltage regulator enabled
PINT = IDDR ⋅ VDDR + IDDA ⋅ VDDA
IDDR is the current shown in (Table A-7) and not the overall current flowing into VDDR, which
additionally contains the current flowing into the external loads with output high.
∑ PIO = i RDSON ⋅ IIOi2
Which is the sum of all output currents on I/O ports associated with VDDX and VDDR.
102
Freescale Semiconductor
Share Link: 
