Qaisar Azeemi Member Dec 23, 2011 #1 Can any one please explain the difference between 89c51 and 89s51? and what is the sinking and sourcing ports of microcontrollers.. i mean to ask what kind of microcontrollers have sinking ports and what kind of microcontrollers have sourcing ports?
Can any one please explain the difference between 89c51 and 89s51? and what is the sinking and sourcing ports of microcontrollers.. i mean to ask what kind of microcontrollers have sinking ports and what kind of microcontrollers have sourcing ports?
4pyros Well-Known Member Most Helpful Member Dec 24, 2011 #2 Most have both. Look at the data sheets.
3v0 Coop Build Coordinator Forum Supporter Dec 24, 2011 #3 When a micro controller sources a part the IO pin provides the +voltage. When a micro controller sinks a part the IO pin provides the gnd or -voltage. It is possible to do both as you often see in charlieplexing (google it).
When a micro controller sources a part the IO pin provides the +voltage. When a micro controller sinks a part the IO pin provides the gnd or -voltage. It is possible to do both as you often see in charlieplexing (google it).