I am planning a project that uses an AXE131Y display in its standard serial input mode but can also operate as a Kitchen Timer (hours and minutes). To achieve the TImer mode needs 2 digital inputs (one an interrupt) and 2 digital outputs to the built-in 18M2.
As it stands, the AXE131Y has 3 available I/Os, C.0, C.1 and C.2. I need 1 more. I could use the program input C.4 as an input with DISCONNECT but it seems it would be marginally simpler to use the program out C.3 as an output.
Am I right in thinking that DISCONNECT is not necessary to use the prog out pin? And I just need to be sure that nothing overloads the prog pin during programming? Are there any other points I should consider?
Derek
As it stands, the AXE131Y has 3 available I/Os, C.0, C.1 and C.2. I need 1 more. I could use the program input C.4 as an input with DISCONNECT but it seems it would be marginally simpler to use the program out C.3 as an output.
Am I right in thinking that DISCONNECT is not necessary to use the prog out pin? And I just need to be sure that nothing overloads the prog pin during programming? Are there any other points I should consider?
Derek