Content originally posted in LPCWare by bavarian on Wed Apr 20 05:01:32 MST 2016
Yes, the bootcode in ROM is not flexible in this. If it can identify the device as quad-capable via ID reading, it will switch to quad mode and 32MHz (or also to 2-bit mode if it's a know 2-bit flash). Otherwise it stays in 1-bit mode at 18MHz.
Regards,
NXP Support Team.