SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
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.