STA2416 datasheet(31/38 Pages) STMICROELECTRONICS

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STA2416

Interfaces

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7.6

RF interface

The STA2416 radio interface is compatible to BlueRF (unidirectional RxMode2 for data and

unidirectional serial interface for control).

7.7

PCM voice interface

The voice interface is a direct PCM interface to connect to a standard CODEC (for example,

STw5093 or STw5094) including internal decimator and interpolator filters. The data can be

linear PCM (13 to 16-bit), µ-Law (8-bit) or A-Law (8-bit). By default the codec interface is

configured as master. The encoding on the air interface is programmable to be CVSD,

A-Law or

µ-Law.

The PCM block is able to manage the PCM bus with up to three timeslots.

In master mode, PCM clock and data can operate at 2 MHz or at 2.048 MHz to allow

interfacing of standard codecs.

The four signals of the PCM interface are:

Directions of PCM_A and PCM_B are software configurable.

Three additional PCM_SYNC signals can be provided via the GPIOs. See Chapter 10 on

page 35 for more details.

Figure 12.

PCM (A-law,

µ-law) standard mode

Figure 13.

Linear mode

PCM_CLK:

PCM clock

PCM_SYNC:

PCM 8 KHz sync

PCM_A:

PCM data

PCM_B:

PCM data

D02TL558

PCM_CLK

PCM_SYNC

PCM_A

PCM_B

125

µs

D02TL559

PCM_CLK

PCM_SYNC

PCM_A

PCM_B

125

µs

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