STW5094AD datasheet(6/51 Pages) STMICROELECTRONICS

6 / 51 page

STw5094A

6/51

SIGNAL DESCRIPTION

Type definitions:

AI - Analog input, AO - Analog Output, DI - Digital Input, DO - Digital output, DOT - Digital Output Tristate,

DIOD - Digital Input Output Open Drain, DIOT - Digital Input Output Tristate, P - Power Supply or Ground.

Pin N°

Name

Type

Description

MIC1P

Positive high impedance input to transmit preamplifier for microphone 1

connection.

MIC1N

Negative high impedance input to transmit preamplifier for microphone 1

connection.

MIC2P

Positive high impedance input to transmit preamplifier for microphone 2

connection.

MIC2N

Negative high impedance input to transmit preamplifier for microphone 2

connection.

MIC3

High impedance single ended input to transmit preamplifier for

microphone 3 connection. MIC3 can be used as monophonic input for

the FM path in place of FML and FMR

MBIAS

Microphone Biasing Switch.

FML

Auxiliary analog audio Left channel input.

FMR

Auxiliary analog audio Right channel input.

F2,F1

LSP, LSN

Receive analog amplifier complementary outputs. This differential

output can drive 50nF (with series resistor) or directly an earpiece

transductor of 8

Ω. The signal at this output can be: the sum of the

Receive Speech signal from DR, FML (or MIC3) input, the Internal Tone

Generator and the Sidetone signal, or the sum of the Audio Left

channel, FML (or MIC3) input and the Internal Tone Generator, or can

come from FML (or MIC3) input.

HPL

Audio headphone amplifier Left channel output. This output can drive

50nF (with series resistor) or directly an earpiece transductor of 16

Ω.

The signal at this output can be the sum of Audio Left channel, FML (or

MIC3) input and Internal Tone Generator, or the sum of Receive Speech

signal from DR, FML (or MIC3) input, Internal Tone Generator, Sidetone

signal, or can come from FML (or MIC3) input.

HPR

Audio headphone amplifier Right channel output. This output can drive

50nF (with series resistor) or directly an earpiece transductor of 16

Ω.

The signal at this output can be the sum of Audio Right channel, FMR

(or MIC3) input and Internal Tone Generator, or the sum of Receive

Speech signal from DR, FMR (or MIC3) input, Internal Tone Generator,

Sidetone signal, or can come from FMR (or MIC3) input.

REMOUT/OCK

Remocon function digital output / Oversampled Clock out.

REMIN

Remocon function input. A high level at this pin is detected as a non

pressed key, while a low level is detected as a pressed key.

Pulse width modulated buzzer driver output.

SCL

I2C-bus interface serial clock input. SCL is asynchronous with the other

system clocks.

SDA

DIOD

I2C-bus interface serial data input-output.

LRCK

DIOT

Left

⁄ Right clock or Frame Sync for Audio interface input in Slave

mode, output in Master mode.

SCK

DIOT

Audio interface Serial Clock input in Slave mode, output in Master mode.

SDI

Audio interface Data input.

AMCK

Master Clock Input for Audio Mode. Can also be used as Master Clock

in Tone Only and FM Modes.

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