Knowledge Base

The HD8 supports Xwire. Xwire is a method of connecting several boards together into a multiprocessor network.

The Xwire connections are on connectors X1 and X2. Jumpers A0 and A1 can be used for setting the board’s Xwire address via your program, if it is to be a slave. See XwireSetAddr

Xwire documentation.

The maximum number of data bytes that can be transferred into or out of the HD8 via Xwire is 32.

Electrically the HD8 can drive 10 unit loads and represents one unit load. That means one HD8 board can drive 10 other HD8s or other “unit load” boards.

The master configuration table may contain a maximum of 50 entries. This is more than the hardware limit. Conceivably one slave board might have more than one logical device (address) on it.