stlc3040 STMicroelectronics, stlc3040 Datasheet - Page 29

• Manufacturer Part Number: stlc3040
• Description: Subscriber Line Interface Codec Filter, Cofislic
• Manufacturer: STMicroelectronics

6.1.12. TEST MODE F (TST-DC LOOP)
Purpose of this test is to check if DC charac-
teristics (R
rectly.
A trapezoidal signal (see Fig. 10) is sent to the 2-
wire line.
Returned information on Tx B1 byte:
DC Synthesis:
TTX:
Internal Tone
Generation in Rx
Hook detection
I
High Pass Filter
LIM
50
I
t
R
DC
FEED
6
C
AC
and I
Tx
LIM
GAIN
Functional
ON with programmable
amplitude and frequency.
1KHz available
As in Active Mode
Functional
Controlled by CR1.1 and
CR11.1
) synthesis works cor-
Operating Mode:
B Filter:
Z Filter:
Tx Path:
Rx Path:
R, X, GR, Gx
KD:
DC Synthesis:
TTX:
Internal Tone
Generation in Rx:
Hook detection:
I
High Pass Filters:
Reverse Polarity:
LIM
:
Test Dedicated, H.V. Active
Off
Off
Functional
Functional with input
connected to R
Programmable
Programmable (Suggested
max value to avoid saturation
= 800h)
Functional
Not applicable
1kHz available
As in Active Mode
Functional
Controlled by CR1.1 and
CR11.1
Set by SOP register
command Boosted Battery
DC
STLC3040
resistance.
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