| ??? 02/19/06 14:29 Read: times |
#110296 - pFET2 Responding to: ???'s previous message |
Kai Klaas said:
Which pull-up still delivers current? Why does the current flowing out of the port pin decreases from about 650µA to only about 50µA? Kai Hello Kai, I could see that pFET2 will only be ON when the latch o/p changes from logic 1 to 0. How could i know about the current and voltage being delivered by that weak pullup (pFET2). Also, if i need to bring it low with an external device (a switch), i think i dont need to worry about this transition current and voltage. comments please! Kindly let me know for any materials to be gone through. -suresh. |
| 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 |