In P2040RM PCI Express Controller Core Clock Ratio Register (PEX_GCLK_RATIO) it states:
The PCI Express controller core clock ratio register is used to program the ratio of the
actual PCI Express controller clock frequency to the default controller core frequency
( 333 MHz ). This is required only when a PCI Express controller clock frequency other
than the default 333 MHz has to be used.
- What is the exact functionality of this register ?
- What happens if this is set incorrectly (actual PCI Express controller clock is 375MHz, numerator is 16) ?