PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 89

• 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

FREEZE
NLPDIS
DISABLE
ENPCTRL
*Note: In the case of no A-/µ-Law conversion (same Law at near and far end side) the
PCM encoding law can temporarily be changed by any conversion disabling source (µP,
UCC FX-Bit or serial control signal) if ICONVDISLAW is different from IALAWNE/
IALAWFE
Data Sheet
'0': Possible PCM Law conversion is enabled if Bit
'1': The H-register of the corresponding channel are frozen
'0': The freezing of the H-Register for the corresponding channel
'1': The NLP of the corresponding channel is bypassed
'0': The bypass of the NLP for the corresponding
'1': The entire echo canceling path (subtractor, NLP, attenuator in
'0': The disabling (bypass) of the entire canceler for the
'1': Only the settings of the bits CONVDIS, FREEZE, NLPDIS,
'0': The settings of the bits CONVDIS, FREEZE, NLPDIS, DISABLE
(CHIND = '0').
ENPCTRL = '1', Law conversion on/off depends on other
hardware sources (serial control signals, UCC) if ENPCTRL = '0'.
depends on the internal control of the speech control unit only if
ENPCTRL = '1', Freezing of H-Registers for the corresponding
channel also depends on other hardware sources (serial control
signals) if ENPCTRL = '0'.
channel depends on the internal control of the speech control
unit only if ENPCTRL = '1', The bypassing of the NLP for
the corresponding channel also depends on other hardware
sources (serial control signals) if ENPCTRL = '0'.
send and receive path) of the corresponding channel is bypassed
and the H-Register and Speech Control Unit are reset.
corresponding channel depends on the internal control of the
speech control unit only if ENPCTRL = '1', The disabling
(bypass) of the entire canceler for the corresponding channel
also depends on other hardware sources if ENPCTRL = '0'.
DISABLE are valid for the corresponding channel. All other
hardware control sources (serial control signals, UCC, TS16,
IDLE detection) for the corresponding channel are disabled.
for the corresponding channel are 'ored' with
other hardware control sources (serial control signals, UCC,
TS16, IDLE detection).
89
Register Description
Rev. 2, 2004-07-28
PEB 20954
PEF 20954