peb20954 Infineon Technologies Corporation, peb20954 Datasheet - Page 104
peb20954
Manufacturer Part Number
peb20954
Description
Smart Integrated Digital Echo Canceller Sidec
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB20954.pdf
(132 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
peb20954HT
Manufacturer:
MITSUMI
Quantity:
510
Company:
Part Number:
peb20954HT-V1.1
Manufacturer:
SIEMENS
Quantity:
16
Company:
Part Number:
peb20954HTV1.1
Manufacturer:
INFINEON
Quantity:
1 831
Company:
Part Number:
peb20954HV1.3
Manufacturer:
INFINEON
Quantity:
1 831
Preliminary Data Sheet
ACSEFFECT
ACSCTH[4:0]
ACSTH[1:0]
ACONF[6:0] (Addr.: 79H): AFI Configuration, write protected, Reset value = 10H
EMAF
VDHYST
VDIHA
VDAT[3:0]
-
EMAF
ACSEFFECT specifies the effect of slow-down mode. If set to ’1’,
coefficient update is limited to increasing/decreasing by at most 1. If
set to ’0’, coefficient increment/decrement takes place in the normal
way of operation, but turbo mode is disabled. Per default (after reset)
it is not active.
’0’: normal operation
’1’: Disable turbo mode, Coeff. update limited to +/- 1
Aux. Coeff. Supervision Count Threshold:
ACSCTH specifies the threshold for activating the slow-down mode
of operation. Slow-down mode is active if at least 8 * ACSCTH
auxiliary coefficients are "large". The default value
ACSCTH[4:0]="00000" switches off supervision.
Aux. Coeff. Supervision Threshold:
ACSTH specifies the threshold above which the absolute value of
an auxiliary coefficient is considered "large". It refers to TURBOTH
in register ATMAT:
"00": ATMAT.TURBOTH - 32
"01": ATMAT.TURBOTH - 16
"10": ATMAT.TURBOTH - 8
"11": ATMAT.TURBOTH
Echo, Minimum Attenuation Factor for end echo path
’0’: Attenuation 0 dB (no attenuation)
’1’: Attenuation 6 dB
Voice Detection, Hysteresis On/Off:
VDHYST selects whether a hysteresis is used for switching off
"no-voice".
’0’: means that "no-voice" is active only if the
’1’: means that "no-voice" - once activated - remains
Voice Detection, Ignore High Amplitude:
’1’: received values with an amplitude above 126
’0’: all values are taken into account, no values are ignored
Specifies a lower limit on the amplitude of received
set of received values currently in the detection set
(AVDDI.VDINTERVAL) fulfill the "no-voice" criterion.
active for the time specified in AVDHG.VDSODELAY.
(logarithmic) are ignored for "no-voice" detection.
HYST
VD
IHA
VD
104
AT[3]
VD
AT[2]
VD
Register Description
AT[1]
VD
PEB 20954
PEF 20954
AT[0]
VD
04.99