| ??? 10/01/07 19:04 Read: times |
#145206 - AT89C51ID2 PI2.0 and PI2.1 |
I'm trying to get these pins to do anything at all, and they don't seem to cooperate. Perhaps I'm missing some critical tidbit.
The pin description says that they are open drain and can be used as input. I'm not sure in what way these pins can be used as general purpose IO. The SFR maps shows them sitting at 0xF8, I've tried writing to this address to bring the pins low and nothing. I've tried using these pins as input and reading from this address and nothing. I've tried writing to the TWI control register at 0x93 in order to generate a I²C start condition and this doesn't do anything either. Cory |
| Topic | Author | Date |
| AT89C51ID2 PI2.0 and PI2.1 | 01/01/70 00:00 | |
| Pullups | 01/01/70 00:00 | |
| Pullups, check | 01/01/70 00:00 | |
| 89c2051 | 01/01/70 00:00 | |
Back on topic | 01/01/70 00:00 |