HT95R65 datasheet(61/82 Pages) HOLTEK

61 / 82 page

HT95R64/HT95R65

Rev. 1.00

March 3, 2010

R D E T 1

R I N G F

R _ D E T

V D D

C 1

R T I M E

R 1

L i n e

P r o t e c t i o n

N e t w o r k

T I P

R I N G

R i n g S i g n a l

0 1 0 1 0 1 . . . 1 1 1 1 1 . . .

F S K D A T A

* 5 5 . . . . . .

S y n c S i g n a l

M a r k S i g n a l

D A T A S i g n a l

8 - b i t P a c k e t e d F S K D A T A

C o o k e d D A T A

R a w D A T A

3 . 5 8 M H z

R D E T F

F _ P W D N

C L O C K

D O U T

D O U T C

F S K D a t a

2 S

0 . 5 S

C l e a r e d b y S o f t w a r e

t S U P D

S o f t w a r e C o n t r o l

Note:

²*² If the flag FSKSEL=1, the sync signal data will not be packeted.

Call Progress Tone Detector

This Device fully integrated the CPT detector, which has

the advantages of low power consumption, wide CPT

Band detection range from 305Hz to 640Hz, as well as

high performance, is very suitable for Auto-dialing sys-

tem in Telecom applications.

The internal call progress tone detector can be used in

world wide countries. Below is an illustration of a call

progress tone frequency band, and a table of U.S.A.

CPT signal is shown for user reference.

The designer can use a GPIO pin to detect the output

signal, through software to distinguish correct cadence

of CTP to fit any country CPT SPEC requirement for

world wide application purposes. Note that the CPT de-

tector can be disabled by CPTEN pin. The designer can

use an external GPIO pin to enable and disable the CPT

decoder in order to reduce power consumption.

2 0 0 H z

3 0 5 H z

6 4 0 H z

8 0 0 H z

F r e q u e n c y

- 5 0 d B m

R e j e c t e d B a n d

C P T I n - b a n d D e t e c t e d

R e j e c t e d B a n d

L e v e l

0 d B m

- 2 7 d B m

Call progress tone frequency band illustration

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