I

L

V

MC

5

2.7

V

RMC

3.4

2.6

PON

RES E T

t

t

t

t

t

AA

BC

D

D

E

Wit hout us in g the RES E T Code th rough the S e ria l Bu s Inte rfa c e

Us in g t he RES ET Cod e through the S e ria l Bus Inte rfa c e

I

L

V

MC

5

2.7

V

RMC

3.4

2.6

PON

RES E T

AB

C

D

D

ED

FA

t

t

t

t

t

td

td

A: ON-HOOK

B : S TART UP + S P EE CH

C : P ULSE DIALING

D : SP E ECH or DTMF

E : LINE BRE AK E XCHANGE DURATION

F : LINE BREAK EXCHANGE DURATION > t

d

t

2.5V

2.5V

Re s e t control c ode (010111)

s e nt on the s e ria l bus

Figure 8 : Reset and Power ON

MICROCONTROLLER INTERFACE WITH TEA7089A (continued)

TEA7089A

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