| ??? 12/31/05 20:46 Read: times |
#106303 - Much more Responding to: ???'s previous message |
Kevin Timm said:
Anything else obvious that I'm missing? If you're planning on using Dallas' microcontroller tool kit, you'll also need some form of RS232 level converter to connect to your PC's serial port. You'll also need to connect the serial port's ground (DB9 pin 5) to your programmer circuit's ground. Lastly, the three available baud rates from a 20.0000 MHz crystal (13021, 6510, 4340) all have an error rate of 1.7%. Dallas also recommends 2 18 pF load capacitors for the crystal oscillator circuit. |
| Topic | Author | Date |
| ds89c420 programmer | 01/01/70 00:00 | |
| clarification | 01/01/70 00:00 | |
| schematic | 01/01/70 00:00 | |
| Now I understand what you mean... | 01/01/70 00:00 | |
| so, I'm correct? | 01/01/70 00:00 | |
| Yes, you are | 01/01/70 00:00 | |
| not to beat a dead horse | 01/01/70 00:00 | |
| Much more | 01/01/70 00:00 | |
| given | 01/01/70 00:00 | |
thanks | 01/01/70 00:00 | |
| DS89C420 ISP | 01/01/70 00:00 | |
| isp response | 01/01/70 00:00 | |
| External access | 01/01/70 00:00 | |
| caps for crystal | 01/01/70 00:00 | |
| Only NP0 ceramics! | 01/01/70 00:00 | |
| over my head | 01/01/70 00:00 | |
| NP0, X7R, Z5U | 01/01/70 00:00 | |
| digikey will be my friend | 01/01/70 00:00 | |
| Everybody probably already knows | 01/01/70 00:00 | |
| Overlapping standards | 01/01/70 00:00 | |
| holy moly | 01/01/70 00:00 | |
| Oh dear...! | 01/01/70 00:00 | |
| now you're playing me right? | 01/01/70 00:00 | |
| Not really | 01/01/70 00:00 | |
| yes really ;) | 01/01/70 00:00 | |
| one more thing | 01/01/70 00:00 | |
| Sure | 01/01/70 00:00 | |
| max232 charge caps | 01/01/70 00:00 | |
| Yes | 01/01/70 00:00 | |
| a good reference for this . . . | 01/01/70 00:00 | |
| thx | 01/01/70 00:00 |