LPC824 Max board xtal oscillator not working

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LPC824 Max board xtal oscillator not working

661 次查看
lpcware
NXP Employee
NXP Employee
Content originally posted in LPCWare by ECamino on Wed May 04 13:10:18 MST 2016
Hi,

I removed 0-ohm resistors and solder-jumped SJ3 1&2 and SJ4 1&2. 

I have continuity on Y2 to pins 17 and 18.

Using LPCOpen project for LPC824 "periph_wwdt"

In file sysinit_8xx.c, line 68, comment "Chip_SetupIrcClocking();" and add line "Chip_SetupXtalClocking();" 

Build, run debug (using LPCLink on an LPCxpresso 800 board) and I can see it hangs at sysinit_8xx.c, line 78: "while (!Chip_Clock_IsSystemPLLLocked()){}"

I checked the Y2 signal with a scope, and there is no crystal signal from either Y2 pad.

What do I have to do to enable the crystal clock on an LPC824 Max board?

Thanks,

EC
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lpcware
NXP Employee
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