Z0220112VEGR4078 Zilog, Z0220112VEGR4078 Datasheet - Page 56

• Manufacturer Part Number: Z0220112VEGR4078
• Description: IC MODEM 2400BPS DSP AFE 44-PLCC
• Manufacturer: Zilog

Specifications of Z0220112VEGR4078

• Data Format: V.21, V.22, V.23, Bell 103, Bell 212A
• Baud Rates: 2.4k
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PS000904-0107
•
•
•
Table 21. Tone Detector Default Values
•
where level is in dBm. The default value for the threshold is –24 dBm. This value
is set every time CONFIG register, bits 0–6 (MODE) is set up to detect tones. If the
user wishes a different value, it should be reloaded after CONFIG register, bits 0–6
(MODE) is set to detect tones.
Tone Detector
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Tone Detector Status–
The tone coefficients are calculated as follows:
The default values on reset are represented in
The threshold is calculated as follows:
coeff
Threshold
tone
00h
=
Frequency Detected (Hz)
697
770
852
941
1209
1336
1477
1633
1750
1800
1650
2225
2250
1300
2100
600
cos
=
10
⎛
⎝
2π f
-------------------- -
(
level
9600
⋅
tone
) 20
V.22BIS Data Pump with Integrated AFE
⁄
⎞
⎠
⋅
⋅
32767
32767
Table
21:
52