SH7280 Datasheet, PDF (121/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 4 Clock Pulse Generator (CPG)
4.8 USB Operating Clock (48 MHz)
Connection of a ceramic resonator for USB, input of an external 48-MHz clock signal, and
selection of the internal CPG are available as methods for supplying the USB operating clock.
4.8.1 Connecting a Ceramic Resonator
Figure 4.5 shows an example of the connections for a ceramic resonator.
USBEXTAL
Ceramic
Rf
resonator
USBXTAL
Note:
Rd
Ceramic resonator: CSTCZ48M0X11R***-RD
(Murata Manufacturing Co., Ltd.)
Contact your Renesas Technology sales agency for detailes
of Rf and Rd values.
Ta = −30 to +85 °C
*** represents a three-digit alphanumeric which express " Individual Specification".
Since the frequency for USB requires high accuracy, the official product name will be
decided to match the frequency after evaluation of oscillation on the board that is
actually to be used.
Please contact your Renesas Technology sales agency.
Figure 4.5 Example of Connecting a Ceramic Resonator
Rev. 1.00 Jun. 26, 2008 Page 91 of 1692
REJ09B0393-0100