| ??? 02/23/06 13:22 Modified: 02/23/06 13:24 Read: times |
#110582 - IOL Responding to: ???'s previous message |
Doubt: Does that mean that p1.x could sink 10 mA when kept low.
So, i would like to know what does this IOL = 10mA signify. The term "IOL" has a very certain meaning in datasheets. It means, that if the output is low, concretely spoken if the NMOS-FET of output stage is turned-on and the PMOS-FET is turned-off, that then a current of up to 10mA is allowed to flow into the output pin, through the NMOS-FET and finally to ground. This has nothing to do with the current "IIL", that flows, when the port is configuered as input, by writing 1s into the according SFR, and the port then is forced to logic low state by external circuitry. Kai |
| Topic | Author | Date |
| AT89s52 Port pin clarifications: | 01/01/70 00:00 | |
| nice copy, where is the question | 01/01/70 00:00 | |
| output characteristics | 01/01/70 00:00 | |
| most confusing post | 01/01/70 00:00 | |
| Answers | 01/01/70 00:00 | |
| Logic 1 to 0 transition | 01/01/70 00:00 | |
| You haven't read the 'bible' chapter... | 01/01/70 00:00 | |
| no details about transition from logic 1 | 01/01/70 00:00 | |
| other way 'round | 01/01/70 00:00 | |
| There ARE!! | 01/01/70 00:00 | |
| pFET2 | 01/01/70 00:00 | |
| Weak and very weak pull-ups | 01/01/70 00:00 | |
| maintaining low source impedence? | 01/01/70 00:00 | |
| by making thje driver a sink............ | 01/01/70 00:00 | |
| Pull-downs create problems | 01/01/70 00:00 | |
| Maximum IOL per port pin: 10 mA ? | 01/01/70 00:00 | |
| IOL | 01/01/70 00:00 | |
| IOL = 10mA or 1.6mA? in port 1 | 01/01/70 00:00 | |
Depends on load | 01/01/70 00:00 |