We are debugging a pci board and met some difficulties. The main chip is, the local device is SJA1000. We used 8-bit local bus(LAD[7:0]) as data-address multiplex mode, and using this local bus for PCI to communicate with SJA1000.
The difficulty I met is I can¡¯t read the register of SJA1000. I want to know the possible cause and how to solve it. And I want to know how to configure the ¡°Local Address Space (0~1) Bus Region Descriptor Register Description¡±, maybe there is some wrong with the timing between the PCI9052 and SJA1000.
Thanks for your time,