Datasheet

Section 4 Clock Pulse Generators
Rev. 6.00 Aug 04, 2006 page 123 of 680
REJ09B0145-0600
2. Pin Connection when Not Using Subclock
When the subclock is not used, connect pin X
1
to GND and leave pin X
2
open, as shown in figure
4.8.
X
X
1
2
Open
GND
Figure 4.8 Pin Connection when not Using Subclock
3. External Clock Input
• H8/3847R Group and H8/3847S Group
Connect the external clock to the X
1
pin and leave the X
2
pin open, as shown in figure 4.9 (a).
X 1
External clock inpu
t
X 2 Open
Figure 4.9 (a) Pin Connection when Inputting External Clock
(H8/38347R Group and H8/3847S Group)
Frequency Subclock (φ
φφ
φw)
Duty 45% to 55%