Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

PCIe ALTGX reconfig_clk frequency?

The documentation for the stratix IV is somewhat confusing on this matter. It says: "Offset cancellation logic requires a separate clock. In PCIe mode, you must connect the clock input to the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

For PCIe core, fixedclk must be 125MHz which is used to control transceiver data path of Offset Cancellation process. There is no other frequency allows for fixedclk. Whereas, reconfig_clk can be from 37.5 to 50MHz that is used to control the reconfig block controller.