Look at Table 4.3 and Table 9.2 of the 16F84A datasheet. When configured as an External Interrupt, RB0 has a Schmitt Trigger input buffer which needs 0.8*Vdd for a logic high and 0.2*Vdd for logic low. Your voltages appear to be marginal.
|
Look at Table 4.3 and Table 9.2 of the 16F84A datasheet. When configured as an External Interrupt, RB0 has a Schmitt Trigger input buffer which needs 0.8*Vdd for a logic high and 0.2*Vdd for logic low. Your voltages appear to be marginal.
Last edited by dhouston; - 18th October 2009 at 19:36.
Members who have read this thread : 0You do not have permission to view the list of names.
Posting Permissions
Bookmarks