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參數(shù)資料
| 型號(hào)： | CD6420 |
| 廠商： | Cirrus Logic, Inc. |
| 英文描述： | FULL DUPLEX SPEAKERPHONE CHIP |
| 中文描述： | 的全雙工免提通話芯片 |
| 文件頁數(shù)： | 16/52頁 |
| 文件大?。?/td> | 815K |
| 代理商： | CD6420 |
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CS6420
16
DS205PP2
Register 2
*
Denotes reset value
Table 5. Register 2 Bit Definitions
NErle - Network ERLE Threshold
The CS6420 will allow full-duplex operation only
when the Network ERLE exceeds the threshold set
by NErle. See also NFNse. See
Glossary
for a def-
inition of ERLE.
NFNse - Network Full-Duplex Noise Threshold
NFNse works in conjunction with NErle to deter-
mine when the CS6420 should transition into full-
duplex operation. If the current noise level at the
far-end input is greater than NFNse, then NErle is
used to determine if full-duplex is allowed. If the
noise level is below the level of NFNse, the
CS6420 uses an internal estimate of asymptotic
performance to determine whether or not to transi-
tion to full-duplex. If NFNse is zero, NErle is al-
ways used as the full-duplex criterion. The other
values exist for cases where there is not a network
path to converge to, or the existence of a network
path can not be determined prior to placing a call.
b15
b14
b13
NFNse
00
b12
b11
b10
b9
b8
b7
NseRmp
00
b6
b5
RSThd
00
b4
b3
b2
1
1
b1
0
0
b0
0
0
NErle
00
RHDet
00
HDly
00
PCSen
0
Bits
Name
Function
Word
00*
01
10
11
00*
01
10
11
00*
01
10
11
00*
01
10
11
00*
01
10
11
00*
01
10
11
0*
1
Operation
24 dB
18 dB
30 dB
reserved
zero
-42 dB
-54 dB
reserved
5 dB
3 dB
6 dB
reserved
200 ms
100 ms
150 ms
reserved
1 s
0.5 s
2 s
reserved
5 dB
3 dB
6 dB
reserved
high sensitivity
low sensitivity
15-14
NErle
NEC ERLE Threshold
13-12
NFNse
NEC Full-Duplex Noise Threshold
11-10
RHDet
Rx Half-Duplex Detection Threshold
9-8
HDly
Half-Duplex Holdover Delay
7-6
NseRmp
Background Power Estimator Ramp Rate
5-4
RSThd
Rx Suppression Threshold
3
PCSen
Path Change Sensitivity
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