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PCD5032H

ADPCM CODEC for digital cordless telephones

Philips Electronics 

Philips Semiconductors

ADPCM CODEC for digital cordless

telephones

Product specification

PCD5032

Table 2 Overview of gain control options

FUNCTION I2C-CODE

Receiver

01XXX101

gain (relative) 01XXX110

01XXX111

01XXX000

01XXX001

01XXX010

01XXX011

01XXX100

Receiver

volume

01000XXX

01001XXX

01010XXX

01011XXX

01100XXX

01101XXX

01110XXX

01111XXX

Transmitter 10XXX101

gain (relative) 10XXX110

10XXX111

10XXX000

10XXX001

10XXX010

10XXX011

10XXX100

Transmitter 10XX1XXX

mute

GAIN

−3 dB

−2 dB

−1 dB

0 dB

+1 dB

+2 dB

+3 dB

+4 dB

0 dB

−6 dB

−12 dB

−18 dB

−24 dB

−30 dB

−36 dB

RX MUTE

−3 dB

−2 dB

−1 dB

0 dB

+1 dB

+2 dB

+3 dB

+4 dB

TX MUTE

NOTE

default

default

default

default OFF

7.2.2 SIDETONE

With the I2C-bus interface the (local) sidetone level can be

set to −12, −18, −24 dB, or switched off. See Table 3.

The sidetone level is independent of the receiver volume

control setting.

7.2.3 TONE GENERATOR AND RINGER

The PCD5032 contains a programmable tone generator

which can be used for generating ringer tones (BZ+, BZ−)

or local information tones in the receive path (RE+, RE−).

By setting the TONE bit (bit 3) in the operation mode

register, the tone output will be directed to the receiver

DAC, otherwise the tones will be sent to the ringer output

stage. Table 4 shows the possible frequency and volume

settings.

Table 3 Sidetone level options

FUNCTION I2C-CODE

OPTION

NOTE

Sidetone

1000XXXX

1001XXXX

1010XXXX

1011XXXX

No local

sidetone

default

Level = −12 dB

Level = −18 dB

Level = −24 dB

Table 4 Tone output frequency/volume options

FUNCTION I2C-CODE OPTION

NOTE

Volume

(relative)

Frequency

11XXX000

11XXX001

11XXX010

11XXX011

11XXX100

11XXX101

11XXX110

11XXX111

11000XXX

11001XXX

11010XXX

11011XXX

11100XXX

11101XXX

11110XXX

11111XXX

Signal off

−29 dB

−23 dB

−17 dB

−11 dB

−5 dB

−0 dB

+4 dB

400 Hz

421 Hz

444 Hz

800 Hz

1000 Hz

1067 Hz

1333 Hz

2000 Hz

default

sinewave

sinewave

sinewave

sinewave

sinewave

sinewave

squarewave

The ringer output (BZ) is differential and is intended for

low-ohmic devices. If the ringer is switched off then both

outputs are low. The output signal is a pulse density

modulated block wave (on a 32 kHz basic pulse rate) to

generate a sinewave-like output signal, see Fig.9. Volume

is controlled by changing the pulse width of each pulse.

In the square wave mode a full square wave is generated

and results in the maximum volume. The volume settings

(in dB) are given for the first harmonic signal component.

1997 Apr 03

11

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