Does the DS31256 HDLC controller support 8-bit local bus mode?
A2. Yes, the 8-bit local bus is available in bridge mode and has two distinct PCI functions. Function 0 Allows read and write operations to the DS31256 registers through the PCI bus using 8- or 16-bit wide access. However, this function does not allow access to the DS31256 registers, which perform read and write operations on the local bus. Function 1 Allows read and write operations from the PCI bus to the local bus. The software must configure the LBW bit in the LBBMC register to define the width of the local bus as 8 or 16 bits wide.
