peb20954 Infineon Technologies Corporation, peb20954 Datasheet - Page 90

• Manufacturer Part Number: peb20954
• Description: Smart Integrated Digital Echo Canceller Sidec
• Manufacturer: Infineon Technologies Corporation

Preliminary Data Sheet
CONFSCU2[7:0] (Addr.: 13H): Configuration of speech control unit 2,
write protected, Reset value = 97H
BYPTHL[4:0]
READD[1:0]
DHHLEC
CONFSCU3[7:0] (Addr.: 14H): Configuration of speech control unit 3, write protected,
Reset value = A4H
H-Register Control:
MINLEV[4:0]
Double Talk:
THL[4]
LEV[4]
BYP
MIN
THL[3]
LEV[3]
BYP
MIN
Transhybrid loss as of which the canceling unit is bypassed
"00000":
"00001":
"00010":
"00011":
"00100":
"10010":
"11111":
"00": +0 dB
’1’:Enables detection of a change in end echo path in the case of
Minimum level of SI and RI for controlling of the coefficients
(H-Register)
"00000":
"00001":
"00010":
"00011":
"00100":
"10100":
"11111":
Safety distance for SO > residual echo + READD comparison
’0’: disabled
high hybrid loss
THL[2]
LEV[2]
BYP
MIN
0 dB
3 dB
6 dB
9 dB
12 dB
...
54 dB
...
93 dB (theoretical value only, attenuation will never be
reached)
"01": +3 dB
minus infinite, no residual echo limitation
-67.5 dBm0
-66.0 dBm0
-64.5 dBm0
-63 dBm0
...
-39.0 dBm0
...
-22.5 dBm0
THL[1]
LEV[1]
BYP
MIN
90
THL[0]
LEV[0]
BYP
MIN
"10": +6 dB
TIME[1]
ADD[1]
RE
DT
"11": +9 dB
Register Description
TIME[0]
ADD[0]
RE
DT
PEB 20954
PEF 20954
DHHLEC
ITUDT
04.99