Forum Discussion

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

Questions in PCIe BAR

1. Why do we need BAR in PCIe? 2. Why do we need multiple BARs in PCIe? 3. How do we choose type of BAR in PCIe? (64 bits/34 bits, Prefetchable/non-prefetchable) 4. With multiple devices (a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

BAR stands for Base Address Memory and you use them as a reference address when you want to access for example a PIO component from your software.

You decide which BAR will be connected to which device. Dont forget that you will use these addresses when you will write your driver.