Forum Discussion

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

Shared pins on Avalon bus devices

I have a problem with SRAM chip and FLASH chip sharing tri-state address/data bus. I have configured my custom board and ported flash programmer. I have declared FLASH chip as AM29LV641DH with ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
22 years ago

From an engineer...

They should declare their chipselect pin to be of type chipselect_n and read the Avalon Bus Specification Reference Manual. Page 80 of 106 talks about shared pins.

A problem report will be filed saying that the description on page 80 isn't very good. It should define the pin naming scheme. i.e.

Is_Shared = "0" yields

<pin_name>_to_the_<module_name>