TEA7092TQ Просмотр технического описания (PDF) - STMicroelectronics

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TEA7092TQ

TELEPHONE ANALOG FRONT END

STMicroelectronics 

TEA7092

MICROCONTROLLER INTERFACE (continued)

Reset and Power On

Figure 7 : Telephone Set Powered from the Line, IL > IREF1, without Batteries

With ou t Us in g the RES ET Co d e Thro ug h the Se ria l Bu s Interfa c e

IL A

B

C

D

E

D

A

IREF 1

VMC

t

5

2.7

VRMC

t

3.5

2.6

t

P ON

RE S E T

t

Us in g th e RES ET Co de Th rou g h th e S erial Bu s Interfa c e

IL A

B

C

D

E

D

F

D

IREF 1

VMC

5

2.7

t

A

t

VRMC

t

3.5

2.6

P ON

td

td

t

RE S E T

t

A : ON-HOOK

B : S TART UP + SP EECH

C : P ULSE DIALING

D : SP EECH or DTMF

E : LINE BREAK EXCHANGE DURATION

F : LINE BREAK EXCHANGE DURATION > td

td : DELAY FIXED BY THE MICROCONTROLLER

t

Re s et code (0010111) s ent by

the microcontroller.

12/24

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