HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 944

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 20 Clock Pulse Generator
Bit 2
SCK2
0
1
20.3
Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock.
20.3.1
Circuit Configuration: A crystal resonator can be connected as shown in the example in figure
20.2. Select the damping resistance R
crystal should be used.
Table 20.2 Damping Resistance Value
Frequency (MHz)
R
Rev.6.00 Sep. 27, 2007 Page 914 of 1268
REJ09B0220-0600
d
(Ω)
0
1
0
1
Oscillator
Connecting a Crystal Resonator
Bit 1
SCK1
Figure 20.2 Connection of Crystal Resonator (Example)
Bit 0
SCK0
0
1
0
1
0
1
—
EXTAL
XTAL
2
6.8 k
Bus master is in high-speed
mode
Medium-speed clock is φ/2
Medium-speed clock is φ/4
Medium-speed clock is φ/8
Medium-speed clock is φ/16
Medium-speed clock is φ/32
—
DIV = 0
R
d
d
4
500
according to table 20.2. An AT-cut parallel-resonance
C
C
L1
L2
(Initial value)
8
200
Description
12
0
C
L1
= C
Bus master is in high-speed
mode
Clock supplied to entire chip is φ/2
Clock supplied to entire chip is φ/4
Clock supplied to entire chip is φ/8
—
—
—
DIV = 1
L2
16
0
= 10 to 22 pF
20
0
(Initial value)
25
0