hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 157

• Manufacturer Part Number: hd64338342hw
• Description: Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Avoid running signal lines close to the oscillator circuit, since the oscillator may be adversely
affected by induction currents. (See figure 4.4.)
The board should be designed so that the oscillator and load capacitors are located as close as
possible to pins OSC
4. External Clock Input Method
Connect an external clock signal to pin OSC
typical connection.
Frequency
Duty cycle
Note: The circuit parameters above are recommended by the crystal or ceramic oscillator
manufacturer.
To be avoided
1
OSC
OSC
and OSC
Figure 4.4 Board Design of Oscillator Circuit
C
C
Figure 4.5 External Clock Input (Example)
1
2
1
2
2
.
Open
Signal A Signal B
1
, and leave pin OSC
Oscillator Clock (
45% to 55%
Rev. 6.00 Aug 04, 2006 page 121 of 680
External clock input
Section 4 Clock Pulse Generators
OSC
OSC
2
open. Figure 4.5 shows a
OSC
1
2
)
REJ09B0145-0600