Hi Sumanth,
He are some engineering power numbers....yes it runs hot.
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 200 mWatts.
Regards, David