These posts by Colin Mac have received thanks:
| internal pullups on port 0 |
| Yes, no external resistors are needed. It works fine with the internal pullups. |
| Thanked 1 time Posted by Colin Mac on |
| C code for controlling the received byte from RXD and save it in external mem |
| To write 55 hex to 1FFH of external memory, this is all you need. It's in asm but should be obvious of what's happening. MOV DPTR, #1FFFH MOV A, #55h MOVX @DPTR, A |
| Thanked 1 time Posted by Colin Mac on |