TEA1069 datasheet(23/44 Pages) PHILIPS

23 / 44 page

1998 Jan 08

Philips Semiconductors

Product speciﬁcation

Versatile speech/dialler/ringer with

music-on-hold

TEA1069; TEA1069A

The STD contains the states (rectangles in the figure) and

state transitions (arrows) of the set. The upper arrow in the

figure pointing to the standby state means that the set is

initially in the standby state. When for instance an

incoming call is detected, the set enters the ringer state,

waiting for a reaction of the user. If the user answers the

call on a handset, the set enters the on-line state.

The TEA1069 and TEA1069A have 3 basic states:

• Standby state

• Ringer state

• On-line state.

Each state with its own functional requirements is

described in the following sections.

STANDBY STATE

In standby state the TEA1069 and TEA1069A are inactive.

The current drawn is for memory retention and depends on

the loads of the inputs/outputs of the dialler. In this state

output DP/FL is HIGH so that the line is disconnected.

The ICs leave the standby state if:

• The set goes off-hook (lift handset or press [HOOK])

• A ringer-signal is available on the line.

The ICs go to the standby state if:

• The set goes on-hook

(handset on the cradle or press [HOOK])

• A line-break occurs for at least the reset delay time (trd)

• The ringer-signal becomes invalid.

RINGER STATE

If the set is in standby mode, a ringer signal can be

received from the line. After evaluating the incoming ringer

signal (and ringer signal is valid), the TEA1069 and

TEA1069A start a melody via the TONE output ringer

hardware, and stops this melody if the ringer signal is not

valid any more. After going off-hook, the ringer signal stops

and the set is in conversation (on-line) state.

During a ringer burst the ringer volume can be changed

according to Fig.24 and melodies can be changed

according to Table 7.

Table 7

Melody selection

ON-LINE STATE

In this paragraph all the actions of the TEA1069 and

TEA1069A during on-line state are described. The on-line

mode starts with making output DP/FL LOW, which makes

line current flow possible. The on-line state contains a

number of sub-states (see Fig.22):

• Conversation state

• Dialling state

• Memory recall state

• Program state.

MELODY

KEY

Bell 1

[1]

Bell 2

[2]

Bell 3

[3]

Bell 4

[4]

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