| ??? 07/15/05 07:45 Read: times |
#97418 - LPC932 at powerup |
I am having problems with a LPC932 that is not starting properly.
The setup: LPC932 revG getting 3V3 from LP2980. The 932 is (among other things) running multiplexed LEDs. There are some parts of the system running on 5V, some signals from the 5V part are connexted to the LPC, among others Rx and Tx. It is a 4-layer board. It has a reset from DS1818 BUT does not start the scanning of the the LEDs every time. (Nothing happens). The oscillator works, there is an external XTAL. If i take away the DS1818 it works better, starts about 9 times out of 10, with DS1818 it starts like 1 of 4. I'm stuck, ideas please /Anders |
| Topic | Author | Date |
| LPC932 at powerup | 01/01/70 00:00 | |
| what clock? | 01/01/70 00:00 | |
| clock | 01/01/70 00:00 | |
| Scope time | 01/01/70 00:00 | |
| LP2980, multiplexing | 01/01/70 00:00 | |
| To Ijaz and Kai | 01/01/70 00:00 | |
| Ah yes... | 01/01/70 00:00 | |
| Maybe reset chip is unsuited? | 01/01/70 00:00 | |
Problem solved | 01/01/70 00:00 |