PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 113

• 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

AVDDI[7:0] (Addr.: 73H): AFI Voice Detection, Detection Intervals, write protected,
Reset value = 77H
VDMAXINTERVAL[3:0]
VDINTERVAL[3:0]
Data Sheet
VDMAX
INTER
VAL[3]
VDMAX
INTER
VAL[2]
delays > 128 ms, a tandem configuration of two SIDEC ASICs has to
be used in which a single SIDEC chip processes only every other four
channels:
Master:
Slave:
If the 128 ms mode is not selected (pins MODE0 and MODE1),
any DELAYs > 64 ms in register AEEPD are interpreted as 64 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
Time interval for detecting maximum value for "no-voice" detection:
VDMAXINTERVAL defines the time range over which the maximum
of the received values for "no-voice"-detection is determined.
"0000": 8 ms
"0010": 24 ms
"0100": 40 ms
"0110": 56 ms
"1000": 72 ms
"1010": 88 ms
"1100": 104 ms
"1110": 120 ms
Time interval for voice detection:
VDINTERVAL defines the time range over which received values
are checked for "no-voice"-detection. The coding is the same as for
AEEPD.DELAY.
"0000": 8 ms
"0010": 24 ms
VDMAX
INTER
VAL[1]
0,1,2,3,
4,5,6,7,
VDMAX
INTER
VAL[0]
8,9,10,11,
12,13,14,15, 20,21,22,23, 28,29,30,31
"0001": 16 ms
"0011": 32 ms
"0101": 48 ms
"0111": 64 ms
"1001": 80 ms
"1011": 96 ms
"1101": 112 ms
"1111": 128 ms
113
"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": 16 ms
"0011": 32 ms
INTER
VAL[3]
VD
16,17,18,19, 24,25,26,27
INTER
VAL[2]
VD
Register Description
INTER
VAL[1]
VD
Rev. 2, 2004-07-28
PEB 20954
PEF 20954
INTER
VAL[0]
VD