PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 49

• 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

.
Figure 10
3.2.3
The UCC Interface uses a clock frequency of 2048 kHz. The UCC Signal is structured
into frames (period 125 s) consisting of 32 channels (period 3.9 s) and a multiframe
consisting of 32 frames (period 4 ms). The multiframe is synchronized with the SYNCI
Input pulse. The SIDEC reads and writes (tristate controlled) only the channels 0 of the
frames. The 32 channels 0 of each multiframe are used to control and supervise the
associated PCM channels. UCC Frame 0 corresponds to PCM channel 0, UCC Frame
1 corresponds to PCM channel 1, .... This relation is depicted in
possible to use one special UCC-Frame for a general purpose. With the registers
UCCMFR, UCCALIGN and PHALIGN[7:6] the UCC channel 0 of frame 0 can be shifted
to any channel and frame. Hence, up to 32 different devices can be connected in parallel
to the UCC Interface.
The output signal UCCO is always in phase with the UCCI input signal.
Data Sheet
Send Path
RSLOOP
UCC Interface
'0'
'1'
Bypass and Disabling Functions of the SIDEC
'0'
'1'
RBYPASS
Frame
Alignm.
Frame
Alignm.
64 Clear
log
'1'
'0'
lin
log
lin
tractor
Sub-
BYPASS
'0'
'1'
NLP
'1'
'0'
NLPDIS
49
Attenuator
Attenuator
BYPASS
'1'
'0'
lin
log
lin
64 Clear
'0'
'1'
Functional Description
log
Frame
Alignm.
Frame
Alignm.
Figure
SBYPASS
Rev. 2, 2004-07-28
Bypass Disable Functions
'1'
'0'
PEB 20954
11. It is also
PEF 20954
'1'
SRLOOP
'0'
Send Path