Schematic convention for breaking signals out of a bus?

[knotlogic]

Apologies if the topic title is confusing, but I'm not sure what exactly the proper terminology is.

Is there any standard way of drawing signals that are routed out of a bus in a circuit schematic?  For example in the picture I attached, PortB 0 to 4 on my uC are routed to a bus.  I've seen some schematics where the signals meet the bus at right angles, but others where it meets the bus at 45 deg.  And in the latter case I haven't been able to find out if there's any convention to which way the 45 deg tilt should go.

[Gribo]

45 degrees out of the bus is the convention in OrCad, PADS and Altium. It creates a difference from component connection (90 degrees).

[stmdude]

Yup, 45 degree to break out from a bus, standard in KiCad as well (required even, if you want to pass DRC checking).

Also, you should label _which_ signal you're breaking out of the bus, for readability.

I have a schematic with _lots_ of bus breakouts here: https://github.com/slowcoder/SMSSchematic/raw/master/SMSSchematic.pdf
( Updated/modernized schematic for a SEGA MasterSystem )

[knotlogic]

Thanks all.

Should the 45 deg tilt go "upwards" or "downwards" when entering the bus?

Also, you should label _which_ signal you're breaking out of the bus, for readability.

Doh!  That seems so obvious I don't know why I haven't already been doing that.

[basinstreetdesign]

I doubt if there is any real convention which way the angle breakout should be; its up to what you think looks better.  Personally I like the angle to suggest which way the signal in question is traveling along the bus (sorta suggestive of a cable-stitched bundle of wires).

However, having labels on each breakout net is mandatory or else the software doesn't know which signal to connect it to in the netlist.

[vzoole]

or else the software doesn't know which signal

This is Eagle and it is know without label (just the user could be confused).