TC9256, 57APG/AFG

2006-07-14

8

As Figure 2 shows, the clock required for internal operation is produced by connecting a crystal oscillator

between capacitors. Use the crystal oscillator selection bit to select an oscillating frequency of 3.6 MHz, 4.5 MHz,

7.2 MHz or 10.8 MHz to match that of the crystal oscillator being used.

C

= 30 pF typ.

Note:

3.6 MHz (OSC1

= “0” and OSC2 = “0”) is set when power is turned on. The crystal is not oscillating at this

time because the system is in standby mode.

Figure 2