This Serial Communications Controller from Zilog lists a few of its pins with a bar above the name. What does this bar mean?
From a schematic I have been looking it seems a few of these are inactive when high and active when low?
Electronic – What does the bar above a pin name in a datasheet mean
datasheet
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Best Answer
As you surmise, it means that the function the pin name implies is active when low.
For example, /INT is low to trigger an interrupt and /WR is low to indicate a write.