PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 64
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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PEB 20954
PEF 20954
Operational Description
and UCCMFR. For finer adjustments, the valid bit phase of the UCC signals at the first
detection of an active SYNCI with the falling edge of SCLKI can be configured by writing
to the two MSBs of register PHALIGN.
The configured frame and bit phase alignment always denotes the beginning of the ideal
bit phase (no signal delay) at the falling edge of SCLKI. If SYNCI is sampled with the
falling edge of SCLKI (CONFCC.SSCLKEDGE='0') this edge is the synchronization
point for PCM and UCC signals. If SYNCI is sampled with the rising edge of SCLKI
(CONFCC.SSCLKEDGE='1') the next falling SCLKI edge is the synchronization point for
PCM and UCC signals. This behavior is identical to the PCM signal behavior and
illustrated in
Figure 21
in
Chapter 4.2.1
UCC inputs are always sampled with the falling edge of SCLKI at the beginning of bit
phase 2, UCCO and TUCCO are clocked out with the falling edge of SCLKI at the
beginning of bit phase 0. The value of register UCCMFR denotes the frame number of
the next complete frame that starts with phase 0, bit 7, channel 0 after the first detection
of an active SYNCI with the falling edge of SCLKI (see figure below).
Data Sheet
64
Rev. 2, 2004-07-28
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