HD64F38602R Datasheet, PDF (104/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 4 Clock Pulse Generators
4.5 Usage Notes
4.5.1 Note on Resonators and Resonator Circuits
Resonator characteristics are closely related to board design. Therefore, resonators should be
assigned after being carefully evaluated by the user in the masked ROM version and flash memory
version, with referring to the examples shown in this section. Resonator circuit constants will
differ depending on a resonator, stray capacitance in its mounting circuit, and other factors.
Suitable constants should be determined in consultation with the resonator manufacturer. Design
the circuit so that the oscillator pin is never applied voltages exceeding its maximum rating.
Vcc
OSC1
Vss
OSC2
RES
X2
X1
AVcc
(Vss)
Figure 4.9 Example of Crystal and Ceramic Resonator Assignment
Rev. 3.00 May 15, 2007 Page 72 of 516
REJ09B0152-0300