Specifications

45
AT83SND2CMP3
7524D–MP3–07/07
Clock Controller The USB controller clock is generated by division of the PLL clock. The division factor is
given by USBCD1:0 bits in USBCLK register. Figure 30 shows the USB controller clock
generator and its calculation formula. The USB controller clock frequency must always
be 48 MHz.
Figure 30. USB Clock Generator and Symbol
USBCD1:0
USBCLK
48 MHz USB Clock
USBclk
PLLclk
USBCD 1+
--------------------------------=
USB
CLOCK
USB Clock Symbol
PLL
CLOCK