SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
The R5FSS has a single clock input. Internally, CPU0 and CPU1 clocks are generated from this clock with individual clock gate control per Core. The interface clocks are derived from this clock internally through suitable division.
The Interface clock is an integer ratio of the CPU clock. The permitted ratio are 1:1 and 1:2 for CPU_CLK:INTERFACE_CLK. The Interface clock shall not exceed 200MHz.
Refer to R5SS and SYSCLK Clock Tree for more details regarding the sequence for choosing CPU and INTERFACE clocks.
The CPU core clock can be gated by writing 7 to R5SS[0-1]_CORE[0-1]_GATE_CLKGATE. However, the application code must ensure there are no pending transactions/instructions before executing the gating.