PCD3330-1 datasheet(21/32 Pages) PHILIPS

21 / 32 page

1997 Jan 15

Philips Semiconductors

Product speciﬁcation

Multistandard repertory dialler/ringer with

EEPROM

PCD3330-1

5.7.1

RINGER OUTPUT PIN SELECTION

The ringer signal is sent via the special Ringer Tone

Output (RTO) or via the TONE output depending on the

option selected.

When a loudspeaker is used as a transducer, it is better to

use the TONE output. One of the internal tone generators

directly supplies this output with VRMS = 181 mV.

The RTO output signal, used for PXE transducers, is a

block with a peak-to-peak output voltage of VDD − VSS.

5.7.2

RINGER INPUT FREQUENCY MEASUREMENT

The melody ringer becomes active for all incoming ringer

frequencies higher then the ringer detection LOW

frequency and lower then the ringer detection HIGH

frequency supplied to the CE/RT input of the PCD3330-1.

The ringer detection LOW and ringer detection HIGH

frequencies are selected such that it is possible to use this

PCD3330-1 for both single and double phase rectifier

applications. It is possible to select one out of four ringer

detection LOW and four ringer detection HIGH frequencies

options which are given below:

• Ringer detection LOW 1: 16 Hz

• Ringer detection LOW 2: 20 Hz

• Ringer detection LOW 3: 32 Hz

• Ringer detection LOW 4: 40 Hz

• Ringer detection HIGH 1: 35 Hz

• Ringer detection HIGH 2: 60 Hz

• Ringer detection HIGH 3: 70 Hz

• Ringer detection HIGH 4: 120 Hz.

5.7.3

RINGER MELODIES SELECTION

The ringer melody generator can select out of four different

ringer melody options (stored in EEPROM), given in

Table 7.

Table 7

Ringer melody options

RINGER MELODY

FREQ. 1

(Hz)

FREQ. 2

(Hz)

FREQ. 3

(Hz)

Ringer melody A

738

826

925

Ringer melody B

800

1067

1333

Ringer melody C

1455

1621

1810

Ringer melody D

1995

2223

2510

5.7.4

RINGER VOLUME CHANGE DURING CONVERSATION

AND RINGER MODE

The ringer volume can be controlled by the port pins

RVOL1 and RVOL2 and its value is stored in EEPROM.

The output volume can be changed:

• Via the EEPROM programming procedure (see

Section 5.3.2)

• During conversation mode, when the function keys

option is chosen, with a special key sequence

• During active ringer by a simple key press.

In Conversation mode the procedure is as follows:

• Put the set in conversation mode (supply necessary)

• Depress PR (ringer program key)

• Press one of the four acceptable volume keys (1 to 4);

see Table 8.

Table 8

Ringer volume control, conversation mode

The newly selected value is directly stored into EEPROM.

During active ringing the PR key is not used, the procedure

is as follows:

• Activate the ringer (only then this volume correction is

possible)

• Press one of the four acceptable volume keys (1 to 4);

see Table 9.

Table 9

Ringer volume control, active ringer mode

The newly selected value is directly stored into EEPROM.

KEY

RVOL1

RVOL2

0 (minimum output power)

1 (maximum output power)

KEY

RVOL1

RVOL2

0 (minimum output power)

1 (maximum output power)

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