The OTP devices provide a calibrated 48 MHz internal oscillator. The flash device has a 12 MHz internal oscillator that gets multiplied up to the 48 MHz that is required for full speed USB operation. All of the registers still exist for the multiplier in the OTP devices such that the existing code will operate on both devices with no adverse affects on the devices without the multiplier. The code used for the multipliers can be removed and functionality will remain the same.

