參數(shù)資料
型號: Z0220516SSCR4259
英文描述: Modem Controller
中文描述: 調(diào)制解調(diào)器控制器
文件頁數(shù): 15/48頁
文件大?。?/td> 1331K
代理商: Z0220516SSCR4259
Z02202
ZiLOG
V.22bis Data Pump with Integrated AFE
PS000902-0501
Z02201
15
the X and Y coordinates. A schematic of an eye pattern
circuit is found in Figure 14 at the end of this specification.
The
EYE PATTERN DATA
,
EYEOUT
, outputs a serial bit
stream containing data for display of the eye pattern on an
oscilloscope after D/A conversion. 8 bits of the X-axis data
and 8 bits of the Y-axis are output as a single 16-bit data
stream with the X-axis data first.
EYEOUT
is synchronous
with the rising edge of
EYECLK
.
EYEOUT
is valid only
while the
EYESTB
is Low. Data is shifted out MSB first.
Data on eyeout is shifted out on each rising edge of the
1.536MHz
EYECLK
.
EYEOUT
data is valid on the
following edge of the
EYE
PATTERN
CLOCK
,
EYECLK
.
The
EYEOUT
data is valid when the
EYE
PATTERN
STROBE
,
EYESTB
, is Low.
EYESTB
changes state on the
rising edge of
EYECLK
.
TECHNICAL SPECIFICATIONS
Configurations and Data Rates
Table 8 provides the selectable options, supported data rate,
baud rate, and the modulation method.
Tone Generation and Tone Detection
The Z02201 provides comprehensive and flexible tone
generation and detection, including all tones required to
establish a circuit connection and to setup and control a
communication session. The tone generation furnishes the
DTMF tones for PSTN auto dialing, and the supervisory
tones for call establishment. The tone detection provides
support for call-progress monitoring. The detector can also
be user-programmed to recognize up to 16 tones.
Data Encoding
The data encoding for the Z02201 meets both ITU–T
recommendations and Bell standards.
TRANSMITTED DATA SPECTRUM
The transmitted data spectrum, with compromise
equalization disabled, is shaped in the baseband by the finite
impulse response (FIR) filter. Table 9 reflects the spectrum
characteristics.
Table 8. Selectable Con
fi
gurations
Con
fi
guration
1
V.22 bis 2400
V.22 bis 1200
V.22 1200
V.23 1200/75
V.21
Bell 212A
Bell 103
Notes:
1. Configuration is selected through the RAM location Config.
2. QAM=Quadrature Amplitude Modulation FSK=Frequency Shift Keying, DPSK=Dual Phase Shift Keying
Modulation
2
QAM
DPSK
DPSK
FSK
FSK
DPSK
FSK
Carrier Freq.
1200/2400
1200/2400
1200/2400
1700/420
1080/1750
1200/2400
1170/2125
Data Rate
(bps)
2400
1200
1200
1200/75
300
1200
300
Symbol Rate
(baud)
600
600
600
1200/75
300
600
300
Bits Per
Symbol
4
2
2
1
1
2
1
Constellation
Points
16
4
4
4
Table 9. Spectral Shaping
Mode
V.22
V.22bis
Note:
The carrier and the spectral shaping are selected automatically according to the configuration.
Carrier Freq
1200
2400
Spectral Power Shaping Function
sqrt 75% Raised Cosine at 600 baud
sqrt 75% Raised Cosine at 600 baud
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