si2401 Silicon Laboratories, si2401 Datasheet - Page 34

• Manufacturer Part Number: si2401
• Description: V.22bis Isomodem With Integrated Global Daa
• Manufacturer: Silicon Laboratories

Si2401
34
CPCD
Filter Input
0x001C
0x001D
0x0016
0x0017
0x0018
0x0019
0x001A
0x001B
0x001E
0x001F
0x0020
0x0021
0x0022
0x0023
1
0
CPSQ
Filter B
Filter A
Figure 5. Programmable Call Progress Filter Architecture
1
0
A2_b1
A2_b2
A2_a1
A2_a2
B1_k0
B1_b1
B1_b2
B1_a1
B1_a2
B2_k0
B2_b1
B2_b2
B2_a1
B2_a2
y = x
2
Table 20. Call Progress Filters
–3565
–8184
–3801
–3565
4096
7737
4096
7109
1236
4096
7109
133
256
133
Detect
Energy
Energy
Detect
Rev. 1.0
0
CPCD
1
0
B
A
20log
(A,B)
Max
10
(4096/CPDL) –43 dBm
Hysteresis
A
B
A > B?
TDET