92
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 4.9.
X
X
1
2
GND
Open
Figure 4.9 Pin Connection when not Using Subclock
3. External clock input
Connect the external clock to the X1 pin and leave the X2 pin open, as shown in figure 4.10.
X
1
V
CC
External clock input
X
2
Open
Figure 4.10 Pin Connection when Inputting External Clock
Frequency
Subclock (øw)
Duty
45% to 55%