PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 26
PEF 20954 HT V1.1
Manufacturer Part Number
PEF 20954 HT V1.1
Description
IC ECHO CANCELLER DGTL TQFP144
Manufacturer
Infineon Technologies
Datasheet
1.PEB_20954_HT_V1.1.pdf
(164 pages)
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
SP000007505
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Table 6
Pin No. Symbol
63
62
33
34
Table 7
Pin No. Symbol
84
83
92
91
Data Sheet
UPRES
UPRES
DISWD
UPRESI
SI
RI
SO
RO
Processor Watchdog Circuit
Speech Highways
I/O, PU/PD Function
I/O, PU/PD Function
O
O
I, PU
I, PU
I, PD
I, PD
O
O
write predefined values to the registers WDG1
to WDG3 in this sequence within 2 s and
DISWD='1'. Also active if PORES='0' or
UPRESI='0'
Same as UPRES, but low active
Disable of P-Reset on active watchdog
condition if set to low
Produces a reset signal at UPRES, UPRES if
set to low
2.048 Mbit/s Send speech highway input. Start
of timeslot 0, bit 7 can be flexibly aligned to the
SYNCI/SYNCO pulse in 122 ns steps via
registers SIALIGN and PHALIGN[3:2]
2.048 Mbit/s Receive speech highway input.
Start of timeslot 0, bit 7 can be flexibly aligned
to the SYNCI/SYNCO pulse in 122 ns steps via
registers RIALIGN and PHALIGN[1:0]
2.048 Mbit/s Send speech highway output.
Start of timeslot 0, bit 7 can be flexibly aligned
to the SYNCI/SYNCO pulse in 122 ns steps via
registers SOALIGN and PHALIGN[5:4]
2.048 Mbit/s Receive speech highway output.
This signal will has a fixed delay of one PCM
frame (125 s) with respect to RI
P-Reset. High pulse (125 s) if the P fails to
26
Rev. 2, 2004-07-28
Pin Description
PEB 20954
PEF 20954
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