SM8703AV

NIPPON PRECISION CIRCUITS—7

FUNCTIONAL DESCRIPTION

27 MHz Master Clock

The 27 MHz master clock is generated either by connecting a crystal oscillator element between XTI (pin 8)

and XTO (pin 9), as shown in figure 1, or by connecting an external 27 MHz clock to XTI, as shown in figure

2. Input 27MHz master clock on XTI when using an external clock. Crystal oscillator element must be funda-

mental.

Figure 1. Crystal oscillator connection

Figure 2. External clock input

Oscillator

Internal

Circuits

XTI (Pin8)

XTO (Pin9)

MO2 (Pin24)

MO1 (Pin3)

SM8703AV

C2

C1

C1, C2 = 5 to 33pF

Oscillator

Internal

Circuits

XTI (Pin8)

XTO (Pin9)

MO2 (Pin24)

MO1 (Pin3)

SM8703AV

Open

External Clock