CC-2401K2A-CS5 Copeland Communications Inc, CC-2401K2A-CS5 Datasheet - Page 28

• Manufacturer Part Number: CC-2401K2A-CS5
• Description: MODEM 2400BAUD SECURE 5V
• Manufacturer: Copeland Communications Inc

Specifications of CC-2401K2A-CS5

• Data Format: V.21, V.22, V.23, Bell 103
• Baud Rates: 2.4k
• Interface: UART
• Voltage - Supply: 4.2 V ~ 7 V
• Mounting Type: Surface Mount
• Package / Case: Module
• For Use With: 539-1002 - KIT EVALUATION WORLD MODEM II
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 539-1009; CC-2401K2A-CS5

Call Progress Filters
© 2007, Copeland Communications, Inc.
The programmable call progress filter coefficients are located in DSP address locations 0x0010 through
0x0023. There are two independent 4
coefficients. Coefficients are 14 bits (-8192 to 8191) and are interpreted as, for example, b0 = value/4096,
thus giving a floating point value of approximately -2.0 to 2.0. Output of each biquad is calculated:
The output of the filters is input to an energy detector and then compared to a fixed threshold with hysteresis
(CPDL). Defaults shown are a bandpass filter from 290-630 Hz (03 dB). These registers are located in the
DSP and must be written in the same manner described in “DSP Registers”.
The filters may be configured in either parallel or cas cade through SE6[6] (CPCD) with SE8 = 0x02, and the
output filter B may be squared by selecting SE6[7] (CPSQ) = 1.
w[x] = k0 x x[n] + a1 x w[n - 1] + a2 x w[n - 2]
y[n] = w[n] + b1 x w[n - 1] + b2 x w[n - 2]
DSP Register
th
Address
0x001B
0x001C
0x001D
0x001E
0x0010
0x0011
0x0012
0x0013
0x0014
0x0015
0x0016
0x0017
0x0018
0x0019
0x001A
0x001F
0x0020
0x0021
0x0022
0x0023
order filters, A and B, each consisting of two biquads, for a total of 20
Call Progress Filters
Page 28 of 66
Data Sheet
Coefficient
A1_b1
A1_b2
A1_a1
A1_a2
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
A1_k0
A2_k0
Default
-8184
-3801
-3565
-8184
-3801
-3565
(dec)
4096
7737
1236
4096
7109
4096
7737
1236
4096
7109
256
133
256
133
CC-2401K2 Datasheet Rev 1.5
CC-2401K2