PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 114

• 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

AVDHG[7:0] (Addr.: 74H): AFI Voice Detection, Hysteresis and Gap, write protected,
Reset value = 74H
VDSODELAY[3:0] Delay for switching off "no-voice" after last detection
VDDIFF[3:0]
Data Sheet
DELAY
VDSO
[3]
DELAY
VDSO
[2]
"0100": 40 ms
"0110": 56 ms
"1000": 72 ms
"1010": 88 ms
"1100": 104 ms
"1110": 120 ms
"0000": 8 ms
"0010": 24 ms
"0100": 40 ms
"0110": 56 ms
"1000": 72 ms
"1010": 88 ms
"1100": 104 ms
"1110": 120 ms
VDDIFF defines the criterion for deciding whether a received value
contributes to the "no-voice"-counting or not. A value does contribute
if its amplitude differs by less than VDDIFF from the maximum in the
interval AVDDI.VDMAXINTERVAL.
VDSODELAY defines the "hang-over" time of "no-voice" after it has
been detected for the last time. This delay time is only evaluated if
hysteresis is enabled for "no-voice" detection in ACONF.VDHYST.
Difference between max. and current value for voice detection:
"0000": 0 dB
"0010": 6 dB
"0100": 12 dB
"0110": 18 dB
"1000": 24 dB
"1010": 30 dB
"1100": 36 dB
"1110": 42 dB
DELAY
VDSO
[1]
DELAY
VDSO
[0]
114
"0101": 48 ms
"0111": 64 ms
"1001": 80 ms
"1011": 96 ms
"1101": 112 ms
"1111": 128 ms
"0001": 16 ms
"0011": 32 ms
"0101": 48 ms
"0111": 64 ms
"1001": 80 ms
"1011": 96 ms
"1101": 112 ms
"1111": 128 ms
"0001": 3 dB
"0011": 9 dB
"0101": 15 dB
"0111": 21 dB
"1001": 27 dB
"1011": 33 dB
"1101": 39 dB
"1111": 45 dB
DIFF[3]
VD
DIFF[2]
VD
Register Description
DIFF[1]
VD
Rev. 2, 2004-07-28
PEB 20954
PEF 20954
DIFF[0]
VD