PSB4860HV4.1 Lantiq, PSB4860HV4.1 Datasheet - Page 50

• Manufacturer Part Number: PSB4860HV4.1
• Manufacturer: Lantiq

Specifications of PSB4860HV4.1

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Data Sheet
2.1.7
The alert tone detector can detect the standard alert tones (2130 Hz and 2750 Hz) for
caller id protocols. The results of the detector are provided in the status register and
register ATDCTL0. These registers can be read by the external controller via the serial
control interface (SCI).
Figure 26 Alert Tone Detector - Block Diagram
Table 18
Register
ATDCTL0
ATDCTL0
ATDCTL1
ATDCTL1
ATDCTL1
ATDCTL1
As soon as a valid alert tone is recognized, the status word of the and the code for the
detected combination of alert tones are updated (table 19). With On Hook mode
selected, the end of the alert tone can be detected faster. On Hook mode assumes that
there is no speech signal present.
Table 19
Register
STATUS
ATDCTL0
Alert Tone Detector
Alert Tone Detector Registers
Alert Tone Detector Results
# of Bits
1
5
1
1
1
8
# of Bits Name
1
2
I
1
Name
EN
I1
MD
DEV
ONH
MIN
ATV
ATC
Alert Tone
Detector
Comment
Alert Tone Detector Enable
Input signal selection
Detection of dual tones or single tones
Maximum deviation (0.5% or 1.1%)
On hook mode
Minimum signal level to detect alert tones
Comment
Alert tone detected
Alert tone code
50
SCI
PSB 4860
2000-01-14