PRUSS memory access times

Nick Coolidge

Hi,

I couldn't find a resource anywhere which had specs for the number of cycles hitting various memories(e.g. PRU DRAM, DDR) would take, is this documented anywhere?

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Hi Nick,

The PRU is clocked at 200MHz. All PRU instructions are single-cycle, i.e. 5ns per instruction. For DDR access times there is no public information available. Here are links to some PRU resources:

https://github.com/beagleboard/am335x_pru_package

https://groups.google.com/forum/?fromgroups#!topic/beagleboard/u28ytaoNenU

Please note that the PRU is not supported by TI.