參數(shù)資料
型號(hào)： Z0220122VSCR4078
英文描述： Telecommunication IC
中文描述： 通信集成電路
文件頁(yè)數(shù)： 27/48頁(yè)
文件大?。?/td> 1331K
代理商： Z0220122VSCR4078
Z02202
ZiLOG
V.22bis Data Pump with Integrated AFE
PS000902-0501
Z02201
27
MStatus
0H
Modem Control and Status
b11
RETRAIN (Force a Retrain: V.22bis)
When set, this bit forces a retrain if the data pump has a
V.22bis connection. The CDET (Register 5 bit 1) bit is set to
0 when the retrain begins. The CDET bit is set to 1 when the
retrain is complete. The data pump sets RETRAIN to 0 when
the retrain procedure begins and when the host sets Config
register, bits 0
–
6
(
MODE
)
to any data mode.
OFFHOOK (Enable Off-Hook Relay)
The data pump sets the OH signal to the inverted value of
this bit. For example, when OFFHOOK is 1, the data pump
sets OH Low. When OH is Low, the off-hook relay closes for
the signal from the telephone line to be presented to the data
pump.
b2
The data pump sets OFFHOOK to 1 when the host sets
Config register, bits 0
–
6 (MODE) to 3 (dial), or to any data
mode. The data pump sets OFFHOOK to 0 at any reset.
Modify OFFHOOK only when Config register, bits 0
–
6
(MODE) is set to 0 (STANDBY) to avoid interference with the
data pump
’
s use of this bit.
EQM Maximum Threshold
The upper acceptable limit for the Eye Quality Monitor (EQM). During V.22,
V.22bis or Bell 212A data mode, the EQMlev exceeds EQMMaxThresh, and
the data pump sets Dpctrl, bit 4 (EQE) to 1. The data pump sets this location
to its default value at any reset. Changes in value take effect at the end of
the next baud period.
Received Line Signal Detect OFF Threshold
Received Line Signal Detect ON Threshold
This register represents the upper and lower thresholds of the received
telephone line energy. If Reg5, bit 1 (CDET) to 1, and the telephone line
energy falls below RLSDOffThresh, then the data pump sets Reg5, bit 1
(CDET) to 0. If Reg5, bit 1 (CDET) is 1 and the telephone line energy rises
above RLSDOnThresh then the data pump sets Reg5, bit 1 (CDET) to 1.
These thresholds stabilize Reg5, bit 1 (CDET) by hysteresis when
RLSDOffThresh is set to a lower value than RLSDOnThresh. Use the
following formula when thresh is specified in dBm and is less or equal to 0:
EQM MaxThresh
01F6
400H
RLSDOffThresh
01F5
RLSDOnThresh
01F4
–
48 dBm
–
43 dBm
The data pump sets this location to its default value at any reset. Changes
in value take effect after the next baud period.
Table 15. Modem Data Pump Word De
fi
nitions (Continued)
Register & Address
(hex)
Default
Value
Function and Explanation
01F7
RLSDval
10
power
(
)
20
30
32767
(
)
=
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