SH7280 Datasheet, PDF (107/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 4 Clock Pulse Generator (CPG)
4.2 Input/Output Pins
Table 4.1 lists the clock pulse generator pins and their functions.
Table 4.1 Pin Configuration and Functions of the Clock Pulse Generator
Pin Name
Symbol
I/O Function
Crystal input/output
pins (clock input
pins)
XTAL
EXTAL
Output Connected to the crystal resonator. (Leave this pin open when the
crystal resonator is not in use.)
Input Connected to the crystal resonator or used to input an external
clock.
Clock output pin CK
Output Clock output pin. This pin can be placed in high-impedance state.
Crystal input/output USBXTAL
pins for USB (clock
input pins)
Output Connected to the crystal resonator for USB (equivalent for
CSTCZ48M0X11R). Leave this pin open when the crystal
resonator is not in use.
USBEXTAL
Input
Connected to the crystal resonator for USB (equivalent for
CSTCZ48M0X11R). Connect this pin to Vss when the crystal
resonator is not in use.
To use the clock output (CK) pin, appropriate settings may be needed in the pin function controller
(PFC) in some cases. For details, refer to section 23, Pin Function Controller (PFC).
Rev. 1.00 Jun. 26, 2008 Page 77 of 1692
REJ09B0393-0100