PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 107

• Manufacturer Part Number: PEF 20954 HT V1.1
• Description: IC ECHO CANCELLER DGTL TQFP144
• Manufacturer: Infineon Technologies

Specifications of PEF 20954 HT V1.1

• Function: Smart Integrated Digital Echo Canceller (SIDEC)
• Interface: PCM, Serial, UCC
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 350mA
• Power (watts): 900mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 144-LFQFP
• Includes: Double Talk Detection
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: PEF20954HTV1.1; SP000007505

VDFCTRL[7:0] (Addr.: 76H): Voice Detection Freeze Control,
write protected, Reset value = B4H
VDFRELEN
VDFREL[2:0]:
VDFSOL[3:0]
CONFPSD[7:0] (Addr.: 1CH): Configuration of 2100 Hz tone phase shift detector,
write protected, Reset value = 43H
DT30DIS
DEP[1:0]
DBPMIN[1:0]
Data Sheet
DT30DIS
RELEN
VDF
DEP[1]
REL[2]
VDF
'0': No freeze of H-Register on no voice detection when
'1':Freeze of H-Register on no voice detection when
Threshold for total echo loss (ERL+ERLE) at which H-Register are
"000": 27 dB
"010": 30 dB
"100": 33 dB
"110": 36 dB
Threshold for residual echo level at Send Out below
which the H-Register are frozen on a 'no voice' signal.
"0000":minus infinite: no freezing for periodic signals
"0001":-66 dBm0
"0010":-63 dBm0
"0011":-60 dBm0
"0100":-57 dBm0
...
"1101":-30 dBm0
"1110":-27 dBm0
"1111":-24 dBm0
'0': disable evaluation if phase shift detection of >30 ms is identified
'1': enable phase shift detection >30 ms
Evaluation time:
If no phase shift is detected in the time interval below the evaluation
is terminated.
"00": 749 ms
"10": 916 ms
Minimum interruption time that results in response:
frozen on a no voice signal detection if VDFRELEN = '1'
combined loss (ERL+ERLE) > VDFREL
combined loss (ERL+ERLE) > VDFREL
DEP[0]
REL[1]
VDF
REL[0]
MIN[1]
VDF
DBP
107
"001": 28.5 dB
"011": 31.5 dB
"101": 34.5 dB
"111": 37.5 dB
FSOL[3]
MIN[0]
DBP
VD
"01": 833 ms
"11": 999 ms
FSOL[2]
MAX[2]
DBP
VD
Register Description
FSOL[1]
MAX[1]
DBP
VD
Rev. 2, 2004-07-28
PEB 20954
PEF 20954
FSOL[0]
MAX[0]
DBP
VD