| ??? 07/08/10 06:30 Read: times |
#177150 - So that's OK, then! Responding to: ???'s previous message |
Gonzalo Avila said:
According to the GPS module datasheet, the serial data output level is ttl compatible and output is 0 ~ 2.85V.
According to the AT89S52, Vih (Input High Level) is 1.9v. So that's OK, then - the GPS high-level output exceeds the AT89S52 input high-level threshold. You don't have much noise margin, but it should work. |
| Topic | Author | Date |
| Connecting AT89S52 to a 2.85v signal | 01/01/70 00:00 | |
| So that's OK, then! | 01/01/70 00:00 | |
| Input current too high? | 01/01/70 00:00 | |
| give two values for the GPS | 01/01/70 00:00 | |
| Values | 01/01/70 00:00 | |
| Level Shifter? | 01/01/70 00:00 | |
| yes, unless | 01/01/70 00:00 | |
"very slow" ? | 01/01/70 00:00 |