Renesas H8 Series

Section 4 Clock Pulse Generators
Rev. 7.00 Mar 10, 2005 page 107 of 652
REJ09B0042-0700
C
1
C
2
OSC
1
OSC
2
R = 1 M ±20%
f
Ω
R
f
Frequency
Note: Circuit constants should be determined in
consultation with the resonator manufacturer.
Crystal
oscillator
C
1
, C
2
Recommendation
value
12 pF ±20%NDK4.19 MHz
Figure 4.3(1) Typical Connection to Crystal Oscillator
(H8/38024, H8/38024R Group)
OSC
1
OSC
2
Frequency
Crystal
oscillator
C
1
, C
2
Recommendation
value
Products
name
C
1
C
2
R
f
R = 1 M ±20%
f
Ω
4.0 MHz NDK NR-18 12 pF ±20%
Note: Circuit constants should be determined in consultation
with the resonator manufacturer.
Figure 4.3(2) Typical Connection to Crystal Oscillator
(H8/38024S, H8/38124 Group)
Figure 4.3 shows the equivalent circuit of a crystal oscillator. An oscillator having the
characteristics given in table 4.2 should be used.
C
S
C
0
R
S
OSC
1
OSC
2
L
S
Figure 4.4 Equivalent Circuit of Crystal Oscillator