SAA7274 Datasheet, PDF (6/16 Pages) NXP Semiconductors – Audio Digital Input Circuit ADIC

Philips Semiconductors
Audio Digital Input Circuit (ADIC)
Product specification
SAA7274
Fig.3 Generation of phase output signal (OPHA) and phase reference signal (OREF); f_IBIFA = f_IOSCL/4.
Fig.4 Generation of phase output signal (OPHA) and phase reference signal (OREF); f_IBIFA = f_IOSCL/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
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