PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 106

• 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

Coefficient (H-Register) reset:
DISHRES
PSHRES
Reset of attenuation meters in SCU:
PSLMRES
DISRES
CONFSCU10[7:0] (Addr.: 1BH): Configuration of speech control unit 10,
write protected, Reset value = C0H
Additional Controls:
DISLOCK[4:0]
DIS56EN
ITUDIS
SPPROT
Data Sheet
LOCK[4]
DIS
LOCK[3]
DIS
Speech protection for 2100 Hz tone detection:
'0': no reset via 2100 Hz Disabler without phase shift
'1': reset via 2100 Hz Disabler even without phase shift
'0': no reset via 2100 Hz Disabler even with phase shift
'1': reset via 2100 Hz Disabler with phase shift
'0': no reset of via 2100 Hz Disabler even with phase shift
'1': reset via 2100 Hz Disabler with phase shift
'0': no reset via 2100 Hz disable tone without phase shift
'1': reset via 2100 Hz disable tone even without phase shift
Self-locking level after response of the 2100 Hz tone disabler.
The tone disabler is inactive if the level is below the following value.
"00000":
"00001":
"00010":
"00011":
"00100":
...
"11000":
...
"11111":
'0': no special evaluation of bit 8 (LSB) in T1 frames for modem calls
'1': special evaluation of bit 8 (LSB) in T1 frames for modem calls:
'0': drop out time for tone disabler up to > 400 ms (necessary for
'1': drop out time for tone disabler < 400 ms according ITU
'0': normal speech protection
'1': Increased Speech protection
LOCK[2]
If all bit 8 (LSB) are '1' the first seven bit will bypass the echo
canceller.
some modems). Interruption up to 400 ms of modem tone does
not cause enabling of canceller.
DIS
LOCK[1]
DIS
106
minus infinite
-67.5dBm0
-66.0dBm0
-64.5dBm0
-63 dBm0
-33.0 dBm0
-22.5 dBm0
LOCK[0]
DIS
56EN
DIS
Register Description
ITU
DIS
Rev. 2, 2004-07-28
PEB 20954
PEF 20954
PROT
SP