PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 99

• 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

terminated by the software by resetting the bit TESTTIMER.UPTEST. If the channel that
is background tested by the software suddenly becomes enabled by external sources
before the test is terminated an interrupt is generated that informs the software to abort
the test immediately.
CTRLTEST[7:0] (Addr.: 38H): Control of test channel, Reset value = 00H
TFREEZE
TNLPDIS
TATTDIS
TSINDIS
TEN
TALAW
TEDEL [1:0]
Note: For the internal functionality of the channel that is tested in the background all
external control sources have no effect.
TSGSPP[7:0] (Addr.: 39H): Test signal generator for send path pattern,
Reset value = 55H
Data Sheet
FREEZE
MOD1
SG
T
SPTP[6]
NLPDIS
T
Freeze of speech control unit and H-Register in selected test
channel:
'1': speech control unit and H-Register are frozen
'0': normal operation
NLP disable (bypass) in selected test channel:
'1': NLP disabled
'0': normal operation
Disable of output attenuator in selected test channel:
'1': Attenuator disabled
'0': normal operation, according to setting of register CONFPCM
Disable of "no speech" detection in selected test channel:
'1': "no speech" detection disabled
'0': normal operation
En/Disable of selected test channel:
'1': test channel enabled
'0': test channel disabled (H-Register and Attenuation meters reset)
PCM encoding Law selection of selected test channel:
'1': test channel A-Law encoded
'0': test channel µ-Law encoded
end echo delay for test pattern:
"11": 7*125 s
"10": 6*125 s
"01": 5*125 s
"00": 4*125 s
SPTP[5]
ATTDIS
T
SPTP[4]
SINDIS
T
99
SPTP[3]
EN
T
SPTP[2]
ALAW
T
Register Description
EDEL[1]
SPTP[1]
Rev. 2, 2004-07-28
T
PEB 20954
PEF 20954
EDEL[0]
SPTP[0]
T