No. 6498-9/39

LC651432N/F/L, 651431N/F/L

Oscillator Circuit Options

Option

Circuit

Conditions and notes

The PI0/OSC2 pin is used as the PI0 pin.

External clock

OSC1

The PI0/OSC2 pin is used as the OSC2 pin

and the port function is unavailable.

Two-pin RC oscillator

OSC1

PI0/OSC

Rext

Cext

The PI0/OSC2 pin is used as the OSC2 pin

and the port function is unavailable.

Ceramic oscillator

OSC1

PI0/OSC

R

C1

C2

Ceramic oscillator

element

Divider Circuit Options

Option

Circuit

Conditions and notes

• Applicable to all three oscillator options.

• The oscillator frequency or the external clock

must not exceed 1444 kHz. (LC651431N and

LC651432N)

• The oscillator frequency or the external clock

must not exceed 4330 kHz. (LC651431F and

LC651432F)

• The oscillator frequency or the external clock

must not exceed 1040 kHz. (LC651431L and

LC651432L)

No divider circuit (1/1)

f

OSC

• Only applicable to the external clock and the

ceramic oscillator option.

• The oscillator frequency or the external clock

must not exceed 4330 kHz.

Divide-by-three circuit (1/3)

f

OSC

Divide-by-three

circuit

f

OSC

3

• Only applicable to the external clock and the

ceramic oscillator option.

• The oscillator frequency or the external clock

must not exceed 4330 kHz.

Divide-by-four circuit (1/4)

f

OSC

Divide-by-four

circuit

f

OSC

4

Caution: The following table summarizes the oscillator and divider option combinations. Use care when selecting these options.