SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
The following steps are performed by the PRU firmware for multiply-only mode:
1. Enable multiply only MAC_MODE.
(a) Clear R25[0] for multiply only mode.
(b) Store MAC_MODE to MAC using XOUT instruction with the following parameters:
2. Load operands into R28 and R29.
3. Delay at least 1 PRU cycle before executing XIN in step 4.
4. Load product into PRU using XIN instruction on R26, R27.
Repeat steps 2 and 4 for each new operand.