SAA7274 查看數據表（PDF） - Philips Electronics

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SAA7274

Audio Digital Input Circuit (ADIC)

Philips Electronics 

Philips Semiconductors

Audio Digital Input Circuit (ADIC)

Product specification

SAA7274

Fig.3 Generation of phase output signal (OPHA) and phase reference signal (OREF); fIBIFA = fIOSCL/4.

Fig.4 Generation of phase output signal (OPHA) and phase reference signal (OREF); fIBIFA = fIOSCL/4.

Output function

The output function performs the following tasks:

• Provides the data output (OSDA) with the data bits from each channel in the following order:

Table 2 Order of databits

MSB . . . . . . . . . . . . . . . . . . . . . . LSB 0 0 0 0 0 0 0 0

• Outputs the data of the right and left channel. When word select input signal (IWSEL) is HIGH the data of the right

channel is output and when LOW the data of the left channel is output.

• Delivers serial data to the OSDA output, if IDOEN = HIGH. This occurs on each negative transition of the data clock

input signal (IDACL). Following a status change at the word select input (IWSEL), the data (MSB first) is output on the

first negative transition of IDACL. If the number of clock pulses in a word exceeds 24, then the following bits will be

internally set to zero.

July 1991

6

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