MPC8270VR View Datasheet(PDF) - Freescale Semiconductor
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MPC8270VR Datasheet PDF : 83 Pages
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Power Dissipation
5 Power Dissipation
This table provides preliminary, estimated power dissipation for various configurations. Note that suitable
thermal management is required to ensure the junction temperature does not exceed the maximum
specified value. Also note that the I/O power should be included when determining whether to use a heat
sink. For a complete list of possible clock configurations, see Section 7, “Clock Configuration Modes.”
Table 7. Estimated Power Dissipation for Various Configurations1
Bus
(MHz)
CPM
Multiplication
Factor
CPM
(MHz)
CPU
Multiplication
Factor
CPU
(MHz)
PINT(W)2,3
Vddl 1.5 Volts
Nominal
Maximum
66.67
2.5
166
3.5
233
0.95
1.0
66.67
2.5
166
4
266
1.0
1.05
66.67
3
200
4
266
1.05
1.1
66.67
3.5
233
4.5
300
1.05
1.15
83.33
3
250
4
333
1.25
1.35
83.33
3
250
4.5
375
1.3
1.4
83.33
3.5
292
5
417
1.45
1.55
100
3
300
4
400
1.5
1.6
100
3
300
4.5
450
1.55
1.65
1 Test temperature = 105° C
2 PINT = IDD x VDD Watts
3 Values do not include I/O. Add the following estimates for active I/O based on the following bus speeds:
66.7 MHz = 0.45 W (nominal), 0.5 W (maximum)
83.3 MHz = 0.5W (nominal), 0.6 W (maximum)
100 MHz = 0.6 W (nominal), 0.7 W (maximum)
MPC8280 PowerQUICC II Family Hardware Specifications, Rev. 2
Freescale Semiconductor
15
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