r5s72060w200fpv Renesas Electronics Corporation., r5s72060w200fpv Datasheet - Page 109

• Manufacturer Part Number: r5s72060w200fpv
• Description: 32-bit Risc Microcomputer Superhtm Risc Engine Family / Sh7200 Series
• Manufacturer: Renesas Electronics Corporation.

3.6
3.6.1
Figure 3.2 is an example of connecting the external clock input. When putting the XTAL pin in
open state, make sure the parasitic capacitance is less than or equal to 10 pF. To stably input the
external clock with enough PLL stabilizing time at power on or releasing the standby, wait longer
than the oscillation stabilizing time.
For details on input conditions of the external clock, see section 25.4.1, Clock Timing.
3.6.2
Place the crystal resonator and capacitors CL1 and CL2 as close to the XTAL and EXTAL pins as
possible. In addition, to minimize induction and thus obtain oscillation at the correct frequency,
the capacitors to be attached to the resonator must be grounded to the same ground. Do not bring
wiring patterns close to these components.
Notes on Board Design
Note on Inputting External Clock
Note on Using an External Crystal Resonator
Signal lines prohibited
EXTAL
Figure 3.2 Example of Connecting External Clock
EXTAL
XTAL
CL1
Figure 3.3 Note on Using a Crystal Resonator
This LSI
XTAL
Example of connection with XTAL pin open
CL2
Open state
Reference value
CL1 = 10 pF
CL2 = 10 pF
Note:
The values for CL1 and CL2
should be determined after
consultation with the crystal
resonator manufacturer.
Rev. 2.00 Dec. 09, 2005 Page 85 of 1152
Section 3 Clock Pulse Generator (CPG)
External clock input
REJ09B0191-0200