tea1069n NXP Semiconductors, tea1069n Datasheet - Page 26

• Manufacturer Part Number: tea1069n
• Description: Versatile Speech/dialler/ringer With Music-on-hold
• Manufacturer: NXP Semiconductors

Philips Semiconductors
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.
1998 Jan 08
handbook, halfpage
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
– a dial action is started.
Versatile speech/dialler/ringer with
music-on-hold
(1) VOL1 = HIGH, VOL2 = HIGH.
(2) VOL1 = LOW, VOL2 = HIGH.
(3) VOL1 = HIGH, VOL2 = LOW.
(4) VOL1 = LOW, VOL2 = LOW.
handset- or hands-free state
Fig.24 Volume control state machine.
[ VOL ]
[ VOL ]
[ VOL ]
VOL ]
HIGHEST
LOWEST
HIGH
LOW
[ VOL ]
[ VOL ]
[ VOL ]
[ VOL ]
MBH212
(1)
(2)
(3)
(4)
26
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.
handbook, halfpage
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
PULSE DIALLING
Fig.25 Dialling mode state machine.
PTS = on
[
RECALL
TEA1069; TEA1069A
[
*
/T ]
]
PTS = on
TONE DIALLING
Product specification
PTS = off
MBH213