the root node provides the other stations with power and forwards all incoming can messages between the different bus lines. each line can be switched on and off with a power mos fet. a fuse plus suppressor diode protects against short circuits and over voltage. the power drain of each line is measured through a sense resistor and an op amp. three mcp can bus controllers handle message transmittion and receiption. an avr m16 connects the mcps through a spi backplane.
power level §0400 range [ §0402 .. §0403 ] |
line 0 §0410 range [ §0412 .. §0413 ] |
line 1 §0420 range [ §0422 .. §0423 ] |
line 2 §0430 range [ §0432 .. §0433 ] |