HD6473887 Datasheet, PDF (110/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

2. Pin connection when not using subclock
When the subclock is not used, connect pin X₁ to GND and leave pin X₂ open, as shown in figure
4-9.
X₁
GND
X₂
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.
X1
X2
Open
External clock input
Frequency
Duty
Figure 4-10 Pin Connection when Inputting External Clock
Subclock (øw)
45% to 55%
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