| ??? 02/10/03 16:13 Read: times |
#38711 - RE: 89c51 port default value problem Responding to: ???'s previous message |
Please read the 8051 data sheet:
All port pins are driven high during and after reset. Thus its common practice on typical 8051 designs to switch off all peripherals with high level and switch on with low level. A way can be to use a PNP driver transistor as Steve already suggested. Peter |
| Topic | Author | Date |
| 89c51 port default value problem | 01/01/70 00:00 | |
| RE: 89c51 port default value problem | 01/01/70 00:00 | |
| RE: 89c51 port default value problem | 01/01/70 00:00 | |
| RE: 89c51 port default value problem | 01/01/70 00:00 | |
| RE: 89c51 port problem / A Picture | 01/01/70 00:00 | |
| RE: 89c51 port default value problem | 01/01/70 00:00 | |
| RE: 89c51 port default value problem | 01/01/70 00:00 | |
RE: 89c51 port default value problem | 01/01/70 00:00 |