HD64F3687GHV Datasheet, PDF (124/566 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 5 Clock Pulse Generator
5.6 Subclock Oscillator
Figure 5.16 shows a block diagram of the subclock oscillator.
X2
8 MΩ
X1
Note : Resistance here is a reference value.
Figure 5.16 Block Diagram of Subclock Oscillator
5.6.1 Connecting 32.768-kHz Crystal Resonator
Clock pulses can be supplied to the subclock divider by connecting a 32.768-kHz crystal
resonator, as shown in figure 5.17. Figure 5.18 shows the equivalent circuit of the 32.768-kHz
crystal resonator.
C₁
X₁
C₂
X₂
C₁ = C ₂ = 15 pF (typ.)
Figure 5.17 Typical Connection to 32.768-kHz Crystal Resonator
L_S
C_S
R_S
X₁
X₂
C_O
C_O = 1.5 pF (typ.)
R_S = 14 kΩ (typ.)
f_W = 32.768 kHz
Note: Values here are reference values.
Figure 5.18 Equivalent Circuit of 32.768-kHz Crystal Resonator
Rev. 3.00 Sep. 10, 2007 Page 90 of 528
REJ09B0216-0300