HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 588

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 17 Clock Pulse Generator
of the oscillator's built-in feedback resistor and duty adjustment circuit. Software standby mode
should then be exited by means of an external interrupt.
Bit 5
RFCUT
0
1
Bits 4 to 0—Reserved: These bits can be read or written to, but do not affect operation.
17.3
Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock.
17.3.1
Circuit Configuration
A crystal resonator can be connected as shown in the example in figure 17.2. Select the damping
resistance R
Table 17.2 Damping Resistance Value
Frequency (MHz)
R
Rev.3.00 Mar. 26, 2007 Page 546 of 772
REJ09B0355-0300
d
( )
Oscillator
Connecting a Crystal Resonator
d
Description
Oscillator's built-in feedback resistor and duty adjustment circuit are used
Oscillator's built-in feedback resistor and duty adjustment circuit are not used
according to table 17.2. An AT-cut parallel-resonance crystal should be used.
Figure 17.2 Connection of Crystal Resonator (Example)
EXTAL
XTAL
2
1 k
R
d
4
500
C
C
L1
L2
8
200
C
L1
= C
12
0
L2
= 10 to 22 pF
16
0
(Initial value)
20
0