TEA1069 datasheet(26/44 Pages) PHILIPS

26 / 44 page

1998 Jan 08

Philips Semiconductors

Product speciﬁcation

Versatile speech/dialler/ringer with

music-on-hold

TEA1069; TEA1069A

• Mute state.

When the [HOLD/MUTE] key is pressed (HMS = off) the

mute state is entered and MUTE becomes LOW.

In mute state a music-on-hold melody is generated by

output TONE. Pin MOH/DMO is HIGH (diode

GOS = off) during this state.

This signal can be used to adjust the volume of the

TONE pin. Since MUTE is LOW the TONE output is

transmitted to the telephone line. The mute state is left

when:

– [HOLD/MUTE] is pressed, set returns to either

handset- or hands-free state

– a dial action is started.

Dialling state

During the dial-keys entries the TEA1069 and TEA1069A

start immediately with transmission of the digit(s); the

minimum transmission time is unaffected by the speed of

the entry. Transmission continues as long as further

dial-keys entries have to be processed.

Fig.24 Volume control state machine.

(1) VOL1 = HIGH, VOL2 = HIGH.

(2) VOL1 = LOW, VOL2 = HIGH.

(3) VOL1 = HIGH, VOL2 = LOW.

(4) VOL1 = LOW, VOL2 = LOW.

handbook, halfpage

MBH212

HIGHEST

HIGH

[VOL

−]

[VOL

LOW

[VOL

−]

[VOL+]

LOWEST

[VOL

−]

[VOL

−]

[VOL

(4)

(3)

(2)

(1)

However when keying-in is much faster then dialling-out,

then the 32 digit dialling register will overflow. When this

occurs the dialling is stopped and the error beep will be

generated.

There are two dial modes: pulse dialling and tone dialling.

The initial dialling mode is determined by option PTS.

The state machine which controls the dial mode is shown

in Fig.25.

• Pulse dialling.

In this mode all valid keys are dialled by the pulse dialler.

When during pulse dialling key [

∗/T] is pressed, the

TEA1069 and TEA1069A switch over to tone dialling

(mixed mode dialling). After the switch-over, valid keys

are dialled by the tone dialler. The temporary tone mode

is terminated by going on-hook or recall.

• Tone dialling.

The ICs convert valid keys into data for the on-chip

DTMF generator. Tones are transmitted via output

TONE with minimum tone burst/pause duration.

The maximum tone burst/pause duration is equal to the

key pressing/release time.

• Register recall (flash/earth).

The [RECALL] key will result in a flash or earth action.

• Access pause.

When the [PAUSE/LNR] button is not the first key

pressed, an access pause is entered for repertory or

redialling procedures. When an access pause is

executed MUTE is HIGH. During manual dialling no

access pauses are dialled.

• Last Number Redial (LNR).

If the first key pressed is the [PAUSE/LNR] button, the

number stored in the redial register is recalled and

transmitted. A maximum number of 32 digits can be

Fig.25 Dialling mode state machine.

handbook, halfpage

MBH213

PULSE DIALLING

PTS = on

PTS = off

TONE DIALLING

[*/T]

[RECALL] + PTS = on

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