Power calculation for MCF5483

[Ebda]

Hi,

I need to calculate the power consumption of my MCF5483 processor. Please tell me if any document which describes power calculation details/procedure.

Or give any power calculation which any body did before. that helps me alot.

Thanks,

Ebda

[DavidS]

Hi Ebda,

Don't have numbers for MCF5483 but some for the sister part MCF5475:

The following numbers where measured on a MCF5475 running at 66/132/264 MHz at room temperature.

Instructions in Flash (Flexbus, 3.3V IO)
Data in external SRAM (Flexbus, 3.3V IO)
SDRAM drive turned on to 8mA drive strength

Caches on

DMA moving data from external SRAM to FEC FIFO
FEC continually transmitting data at 10Mbps / half-duplex
CPU alternates reads of SDRAM and internal registers
---------------------------------
1.48V Core     557 mA    .824W
2.50V DDR      227 mA    .568W
3.27V uP I/O    31 mA    .101W
                       ---------
                        1.493W

Note these are only the power measurements for the voltage rails into the processor.  The external memory power budgets are not accounted for here.

I can tell you that the non-encryption parts require ~135mA less on the 1.5V power supply; This saves about .2 Watts.

Regards, DavidS