| ??? 06/01/07 18:46 Modified: 06/01/07 18:50 Read: times |
#140181 - There is no reason whatsoever Responding to: ???'s previous message |
To program it via isp (Flash-magic)i use max232
and 2 npn transistors to go from 3.3 to 5 volts for txd and 2 npn transistors to go from 5 to 3.3 volts for rxd. As long as the MAX232 is powered by 5V there is no need for the 2 NPN transistors. Using a 3V3 powered MAX3232 is far better, but a MAX232 with Vcc 5V will work, just not quite as noise resistant. Do you have the right capoacitors on the MAX232 (there are so many variants with different capacitor values - doub naah triple check). There is no reason whatsoever that the other LPC935 should not work, check your connections. Erik |
| Topic | Author | Date |
| programming P89LPC935 | 01/01/70 00:00 | |
| There is no reason whatsoever | 01/01/70 00:00 | |
| programming p89lpc935 | 01/01/70 00:00 | |
| LPC935 Source | 01/01/70 00:00 | |
| LPC935 Default | 01/01/70 00:00 | |
| lpc935 source | 01/01/70 00:00 | |
| LPC935 Clock source? | 01/01/70 00:00 | |
| I guess | 01/01/70 00:00 | |
| i guess | 01/01/70 00:00 | |
| ISP to ICP bridge | 01/01/70 00:00 | |
| ISP to ICP bridge | 01/01/70 00:00 | |
| ICP | 01/01/70 00:00 | |
| bridge | 01/01/70 00:00 | |
| PS Use the latest version of Flashmagic | 01/01/70 00:00 | |
got new chips | 01/01/70 00:00 |