We got issue from this week which JTAG/SWD lost link with the chip,
some condition as Below :
1. Keil 4.5 + Jlink , and SPIFI mode.
2. the chip is LPC1830BGA100--, and LPC1837BGA100-A
there are 5 pcs of 10 PCB lost link after a week working.
3, base On openplatform 1.02 , we just add some GPIO and timer control ..
no CRP register touch , no AES touch ..
4. when lost JLINK, the chip is working normal , SPIFI interface working.
only JTAG lost link, and can't update .
5. when lost Jlink, P2.7 ISP pin control is not working.
6. When lost Jlink, we try to configure boot mode from USB1 ,
and it's working, i can install LPC USBD driver.
6. we try to replace SPI flash ( W25Q32BV) , and Jtag still not working.
even remove SPI Flash , Jlink still not working.
7. those PCB are working normal few days , and working by un-know reason.
any suggestion for us ?