??? 01/18/05 16:55 Read: times |
#85202 - Or use a terminal program Responding to: ???'s previous message |
For serial programming, you need to power the device, connect a serial cable to UART0 (using a converter), run your favourite terminal program, apply RST = 1, EA = 0, and PSEN = 0 and follow the instructions given in the User Guide (don't be confused, it says DS89c420_user_guide.pdf but it is valid for 430-450,too) (press CR for autobaud etc.) Then you can "talk" to the micro, using the commands described there. When sending an intelhex file, make delays between each line sent - the datasheet says 40us programming time, so 10ms for a 16-byte line should be far enough.
By the way, as for the other part from your question, does 80Cxxx not mean it is a ROM-less part? Jan Waclawek |