NJU26501

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Ver.2003-08-29

1.2 Clock

The NJU26501 CLK pin requires the system clock that should be related to the sample frequency fs. The

CLK/CLKOUT pins can generate the system clock by connecting the crystal oscillator or the ceramic resonator.

Refer to the application circuit diagram about the circuit parameters.

When the external oscillator is connected to CLK/CLKOUT pins, check the voltage level of the pins. Because

the maximum input voltage level of CLK pin is deferent from the other input or bi-directional pins. The maximum

Note: Contact with a manufacture maker about use of a crystal oscillator/ceramic vibrator.

When a crystal oscillator or a ceramic vibrator is used, it connects only required parts of an oscillator.

Do not take out a signal from CLK/CLKOUT.

It becomes the cause of an unusual oscillation and oscillation stop.

When an external clock is used, do not connect other parts to CLKOUT.

When the clock inputted into a CLK terminal is required to be used further externally, fix MCK2ENX

terminal to a Low level, and use the signal outputted from MCK terminal.

When a crystal oscillator is used, choose a crystal oscillator of a basic wave.

CLKOUT

CLK

1KΩ

1MΩ

10pF

24.576

MHz

10pF

Fig.1-6 The example of the oscillator circuit.