z02201 ZiLOG Semiconductor, z02201 Datasheet - Page 57

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

PS000904-0107
Note:
To use the tone detectors, perform the following steps:
1. Set up the tone detector coefficients (
2. Set CONFIG register, bits 0–6 (MODE) to tone detect mode (
3. Set up the tone detector threshold DTDTHRESH.
4. Inspect the tone detector status.
5. When the detection phase is complete, set CONFIG register, bits 0–6 (MODE)
to STANDBY (
Tone detect mode is the same mode used for Biquad tone
detectors, because both Biquad tone detectors and tone
detectors run concurrently. As a result, the host is allowed to
look for individual answer tones as well as call-progress tones.
Threshold (03h)
Tone Detector Status
00h
Comparator
Figure 11. Tone Detectors
).
(00h)
Tone Detector Levels
(026h–035h)
Level 15
Level 0
V.22BIS Data Pump with Integrated AFE
0145
–
(0145h–0154h)
Tone Detector
0154h
Coefficients
Tone 15
Tone 0
).
02h
).
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