UCB1300BE Просмотр технического описания (PDF) - Philips Electronics

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производитель

UCB1300BE

Advanced modem/audio analog front-end

Philips Electronics 

Philips Semiconductors

Advanced modem/audio analog front-end

Preliminary specification

UCB1300

BRIDGE TIED

SPEAKER LOAD

UCB1300

SPKRP

9+

8

SPKRN

SINGLE ENDED SPEAKER CONNECTIONS

UCB1300

UCB1300

SPKRP

9

8

SPKRN

+

SPKRP

9

8

SPKRN

+

+

Fig.6 Possible speaker connections.

The audio input and output path are activated independently; the input path is enabled when AUDIO_IN_ENA is set, the

output path is enabled when AUD_OUT_ENA is set in the audio control register B. This provides the user the means to

reduce the current consumption of the UCB1300 if one part of the audio codec is not used in the application.

The audio codec has a loopback mode for system test purposes, which is activated when the AUDIO_LOOP bit in the

audio control register B is set. This is an analog loopback which internally connects the output of the audio output path

to the input of the audio input path, (see Fig.3). In this mode the normal microphone input is ignored, but the speaker

driver can be operated normally.

1999 Jul 20

11

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