| ??? 04/03/10 03:55 Read: times |
#174797 - Can't find that detail Responding to: ???'s previous message |
I checked my datasheet and it didn't explicitly say any of the I/Os could push full current, but as I am new at this I could be miss interpreting the datasheet. Below I have posted excerpts from the pin details.
excerpts: p0 Port 0 is an 8-bit open drain bidirectional I/O port. As an output port, each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as high-impedance inputs. Port 0 can also be configured to be the multiplexed low-order address/data bus during accesses to external program and data memory. In this mode, P0 has internal pull-ups. p1 Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. The Port 1 output buffers can sink/source four TTL inputs. When 1s are written to Port 1 pins, they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 1 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups. |
| Topic | Author | Date |
| New with MCUs need a little help. | 01/01/70 00:00 | |
| Hi | 01/01/70 00:00 | |
| Some answers but now concerns | 01/01/70 00:00 | |
| Normally very weak source | 01/01/70 00:00 | |
| Can't find that detail | 01/01/70 00:00 | |
| Not many 805x's have push-pull outputs. | 01/01/70 00:00 | |
| Reset | 01/01/70 00:00 | |
| SDCC | 01/01/70 00:00 | |
| Books | 01/01/70 00:00 | |
| Electronics | 01/01/70 00:00 | |
| first read "the bible" | 01/01/70 00:00 | |
| Maybe not First? | 01/01/70 00:00 | |
| Rickey? | 01/01/70 00:00 | |
| I am new, Just somthing I wanted to do. | 01/01/70 00:00 | |
| Dead links | 01/01/70 00:00 | |
| No you are right | 01/01/70 00:00 | |
| hrm | 01/01/70 00:00 | |
| Argh!!! | 01/01/70 00:00 | |
| It's a highly dynamical thing... | 01/01/70 00:00 | |
| a reset writeup, but you don't want to read it now | 01/01/70 00:00 | |
| You mean this one? | 01/01/70 00:00 | |
Thanks | 01/01/70 00:00 | |
| not dead, just incorrectly copied | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 |