| ??? 12/11/06 22:57 Read: times |
#129314 - Problem using my circuit to program 89LPC935 |
I've been working with a hardware design for my own evaluation board of sorts that has 8 LEDs, a couple of DIP switches, pushbuttons, etc.... The circuit is based on the MCB900 schematic, which I got from http://www.keil.com/mcb900/mcb900-schematics.pdf. I used a simple LED flasher program to test whether or not the circuit is working currently and on both the MCB900 and my board, they both flash just fine. When I use FlashMagic and my MCB900 board, the chip communicates just fine. However, if I use my board design and FlashMagic, I can't get it to communicate at all. The schematic to my board is below. I've been playing with this circuit for a couple of weeks looking at everything and I just can't figure out what is the problem. Would anyone have any suggestions or maybe spot something I don't? Thanks.....  |
| Topic | Author | Date |
| Problem using my circuit to program 89LPC935 | 01/01/70 00:00 | |
| this is not a solution, but | 01/01/70 00:00 | |
| App Note | 01/01/70 00:00 | |
| 7402 Vdd connection | 01/01/70 00:00 | |
| Confounded the two regulators? | 01/01/70 00:00 | |
| 7402 | 01/01/70 00:00 | |
CMOS 7402 , LDO | 01/01/70 00:00 |