z02201 ZiLOG Semiconductor, z02201 Datasheet - Page 59

• Manufacturer Part Number: z02201
• Description: Z02201 V.22bis Data Pump With Integrated Afe
• Manufacturer: ZiLOG Semiconductor

Table 22. Biquad Section 1 Coefficients (Hex)
Table 23. Biquad Section 2 Coefficients (Hex)
PS000904-0107
Band (Hz) b2
245–650
360–440
Band (Hz) B2
245–650
360–440
C774
C148
C63E
C7CD
To use the Biquad tone detectors to perform Call-Progress Monitoring, execute
the following:
1. Set the coefficients. Coefficients which are changed remain valid until the next
2. Set CONFIG register, bits 0–6 (MODE) to
3. Set the BIQUADONTHRESH and BIQUADOFFTHRESH values.
4. If the two biquad tone detectors are to be cascaded, set TONESTATUS, bit
5. Inspect TONESTATUS, bit
6. Time the ON time and the OFF time of the tone(s) to provide the cadence,
reset.
detectors and the discrete tone detectors operate simultaneously to allow the
host to look for call-progress tones and individual answer tones at the same
time.
(CASCADE) to
the squarer when the tone detectors are cascaded.
the detection status. If TONESTATUS, bit
TONESTATUS, bit
which is used to identify the type of call-progress tone detected.After call-
progress monitoring is complete, set CONFIG register, bits 0–6 (MODE) to
(STANDBY).
b1
7601
7A66
B1
6FE1
7438
a3
0716
FF5C
A3
F8EA
01AA
1
. If required, set TONESTATUS, bit
a2
F5FB
0000
A2
0000
FEBC
15
(TONEA).
15
a1
0716
00A4
A1
0716
01AA
(TONEA) and TONESTATUS, bit
V.22BIS Data Pump with Integrated AFE
2
13
(detect tones). The biquad tone
(CASCADE) is set, only inspect
5
(SQRDIS) to
14
(TONEB) for
1
to disable
0
13
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