Question. I know an arm946E-S has no MMU.
If you don't enable the MMU on the ARM920T, will it behave much the same as an ARM946-ES?
-Mike
- posted
17 years ago
ARM946E-S vs. ARM920T question
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- Vote on answer
- posted
17 years ago
Hi Mike,
Even if we ignore the memory management features, the ARM946E-S is still different from ARM920T.
ARM920T is based on architecture v4T (same instruction set as ARM7TDMI), while ARM946E-S is based on architecture v5TE, which has a number of new instructions including some Enhanced DSP instructions. Since the v5TE supports all instructions in v4T, program code for ARM920T (without the memory management parts) can run on ARM946E-S. However, programs for ARM946E-S might not run on ARM920T as it might contains instructions that ARM920T doesn't understand.
Beside from instruction set, the instruction cycle timings are different as well.
Joseph
- Vote on answer
- posted
17 years ago
The biggest difference is probably the fact that you won't have a DCache on the ARM920T, if you don't enable the MMU.