参数资料
型号: DS21Q58
英文描述: E1 Quad Transceiver
中文描述: E1四收发器
文件页数: 26/74页
文件大小: 647K
代理商: DS21Q58
DS21Q58 E1 Quad Transceiver
26 of 74
Register Name:
Register Description:
Register Address:
Bit:
Name:
NAME
CCR7
Common Control Register 7
1F Hex
7
6
5
4
3
2
1
0
MM2
MM1
MM0
136S
ALB
TG703
BIT
7
FUNCTION
Unused.
Should be set = 0 for proper operation.
Monitor Mode 2.
Sets the internal linear gain boost (dB) for monitor
mode applications. Please refer to the table below for proper settings.
Monitor Mode 1.
Sets the internal linear gain boost (dB) for monitor
mode applications. Please refer to the table below for proper settings.
Monitor Mode 0.
Sets the internal linear gain boost (dB) for monitor
mode applications. Please refer to the table below for proper settings.
1:1.36 Transformer Select
0 = 1:2 transmit transformer
1 = 1:1.36 or 1:1.6 transmit transformer (see table below for details)
Analog Loopback.
Setting this bit internally connects TTIP and TRING to
RTIP and RRING. The external signal at the RTIP and RRING pins is
ignored.
Unused.
Should be set = 0 for proper operation.
Transmit G.703.
This control bit works with CCR5.5 to select G.703
functionality on the transmitter and receiver (
Table 8-2
). These bits
determine whether the line receiver and transmitter should receive/
transmit a normal E1 signal (Section 6 of G.703) or a 2.048MHz
synchronization signal (Section 10 of G.703).
MM2
6
MM1
5
MM0
4
136S
3
ALB
2
1
TG703
0
136S
L2
L1
L0
APPLICATION
TRANSFORMER
1:1.6
Rt = 0
Rt = 0
Rt = 2.7
Rt = 3.3
N.M.
N.M.
N.M.
N.M.
TRANSFORMER
1:1.36
N.M.
N.M.
Rt = 0
Rt = 0
N.M.
N.M.
N.M.
N.M.
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
75
120
75
120
N.M.
N.M.
N.M.
N.M.
N.M. = Not meaningful
MM2
0
0
0
0
1
1
1
1
MM1
0
0
1
1
0
0
1
1
MM0
0
1
0
1
0
1
0
1
INTERNAL LINEAR GAIN BOOST (dB)
Normal Operation (no boost)
Unused
Unused
Unused
Unused
Unused
Unused
30 dB
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