Chip serial number

Hi jojo,

The fields in the OTP that are tagged as Position/Package and Tester/Timestamp (the addresses 0x7F8EA00 and 0x7F8EA08), the combination of the two registers can give you a unique identifier and you can read them using the Snippets below:

hw_otpc_init(); // Start clock.
hw_otpc_disable(); // Make sure it is in standby mode.
hw_otpc_init(); // Restart clock.
hw_otpc_manual_read_on(false);

p = (uint32_t *)(0x7F8E9C0 + 64);
printf("%08x \n\r",*p);
p++;
printf("%08x \n\r",*p);
p++;
printf("%08x \n\r",*p);
p++;
printf("%08x \n\r",*p);

hw_otpc_manual_read_off();
hw_otpc_disable();

Thanks MT_dialog

Hi There,

Can you please provide me more inputs regarding your issue? Did you burn the OTP? Also, are you using a custom board or any of our development boards? What do you mean the output is all zero? Could you please provide me a screenshot?

Thanks, PM_Dialog

Hi There,

To be honest, I am not able to understand how you are using this code snippet, but you can use the SmartSnippets studio in order to read the chip serial number. So, you need to open the toolbox and open the OPT programmer. After that, you should connect to the OTP header.

Thanks, PM_Dialog

Hi There,

Could you please try this code snippet in any example of the SDK? I will try to replicate this issue in DSPS, but normally this is the procedure you should follow in order to read the OTP header.

Thanks, PM_Dialog