SH7763 Datasheet, PDF (708/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 16 Clock Pulse Generator (CPG)
16.5 Notes on Board Design
(1) Notes on Using Crystal Resonator
Place the crystal resonator and capacitors as close as possible to the EXTAL and XTAL pins. Do
not allow any signal lines to cross the EXTAL or XTAL line to prevent induction from interfering
with correct oscillation.
Crystal resonator
CL1
CL2
Recommended values
CL1 = CL2 = 0-33 pF
R=0Ω
Avoid crossing signal lines
R
EXTAL
XTAL
SH7763
Note: The values for CL1, CL2, and the damping resistance should be determined
after consultation with the crystal resonator manufacturer.
Figure 16.2 Notes on Using Crystal Resonator
(2) Notes on Inputting External Clock via EXTAL Pin
Make no connection to the XTAL pin.
Rev. 1.00 Oct. 01, 2007 Page 642 of 1956
REJ09B0256-0100