This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC2544: CLK issue after power on.

Part Number: CC2544

Hello, 

I am currently developing a USB Dongle + Remote control using the CC2544.

When flashing using the CC Debugger, the code runs as expected, also after a reset. But when I power the board without the CC debugger (through the USB, using the 5 V to 3.3 V internal regulator), the CLK frequency seems to be much lower. As a matter of fact, a simple led controlled with a timer that should toggle every second, it does after several seconds. Reseting the device does not fix it.

The external crystal is 32 MHz. The RESET_N pin is connected to a 1 NF capacitor and to the 2k2 resistor that goes to the debug connector, as recommended in the USB Dongle application note. 

Please, also note that during the initialization of the board, it executes:

CLKCONCMD = 0x80;

while (CLKCONSTA != 0x80);

Any suggestion? Thank you!