Z0220112VSGR4078 Zilog, Z0220112VSGR4078 Datasheet - Page 53

• Manufacturer Part Number: Z0220112VSGR4078
• Description: IC MODEM 2400BPS DSP AFE 44-PLCC
• Manufacturer: Zilog

Specifications of Z0220112VSGR4078

• 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

Table 20. Modem Data Pump Word Definitions (Continued)
PS000904-0107
Register & Address
(hex)
BiQuadOffThresh 052
BiQuadOnThresh 051 –35 dBm Biquad Tone Detectors ON Point
DTD0Lev–
DTD15Lev
DTDThresh
26–35
03 –24 dBm Discrete Tone Detector Threshold
Default
Value
–42 dBm Biquad Tone Detectors OFF Point
—
Function and Explanation
The data pump sets this location to its default value when Config
register, bits 0–6 (MODE) is set to 2 by the host.
This location can be used to set the off point for the Biquad tone
detectors. If the power level is below this value, the detector turns off
the detection status bit.
Use the following formula to set the threshold where the level is in
dBm:
The data pump sets this location to its default value when the host
sets Config register, bits 0–6 (MODE)=2 (detect tones).
The data pump sets this location to its default value when Config
register, bits 0–6 (MODE) is set to 2 by the host.
This location can be used to set the ON point for the Biquad tone
detectors. If the power level is above this value, the detector turns
the detection status bit ON.
Use the following formula to set the threshold where level is in dBm:
The data pump sets this location to its default value when the host
sets Config register, bits 0–6 (MODE) is 2 (detect tones).
Discrete Tone Detector Levels
These locations represent the tone detector levels when in the Tone
Detect mode (Config register, bits 0–6 (MODE) has the value of
02h). These areas may be used by the host to determine which tone
is dominant if multiple tones are detected. These particular locations
have no default.
Threshold
Threshold
V.22BIS Data Pump with Integrated AFE
=
=
10
10
(
(
level
level
) 20
) 20
⁄
⁄
⋅
⋅
32767
32767
49