World Modem NET Page 49 of 64 2005 Copeland Communications, Inc. World Modem NET Datasheet Rev 1.0 U67 ITC1 Bit D15 D14 D13 D12 D11 D1" />
參數(shù)資料
型號(hào)： CC-56K2N-CS5
廠商： Copeland Communications Inc
文件頁(yè)數(shù)： 44/64頁(yè)
文件大?。?/td> 0K
描述： MODEM 56KBAUD SERIAL 5V
標(biāo)準(zhǔn)包裝： 30
數(shù)據(jù)格式： V.22，V23，V.32，V.34，V.90，Bell 103，Bell 212A
波特率： 56k
電源電壓： 4.2 V ~ 7 V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 模塊
包裝： 散裝
其它名稱(chēng)： 539-1012
Data Sheet
World Modem NET
Page 49 of 64
2005 Copeland Communications, Inc.
World Modem NET Datasheet Rev 1.0
U67 ITC1
Bit
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Name
MINI[1:0]
ILIM
DCR
OHS
DCV[1:0]
RZ
RT
Type
R/W
Reset settings = 0x0008
Bit
Name
Function
15:14
Reserved
Read returns 0.
Minimum Operational Loop Current.
Adjusts the minimum loop current at which the DAA can operate. Increasing the minimum
operational loop current can improve the signal headroom at a lower TIP/RING Voltage.
MINI[1:0]
Min Loop Current
00
10 mA
01
12 mA
10
14 mA
13:12
MINI[1:0]
11
16 mA
11:10
Reserved
Read returns 0.
Current Limiting Enable.
0 = Current limiting mode disabled.
9
ILIM
1 = Current limiting mode enabled. This mode limits loop current to a maximum of 60 mA per the
TBR21 standard.
8
Reserved
Read returns 0.
DC Impedance Selection.
0 - Normal DC Impedance. This mode should be used for all standard applications.
7
DCR
1 = 800? DC termination.
On-Hook Speed.
This bit works in combination with the OHS2 bit (U62, bit 8) to set the on-hook speed. The on-hook
speeds are measured from the time the OH bit is cleared until loop current equals zero.
OHS
OHS2
Mean On-Hook Speed
0
Less than 0.5 ms
0
1
3ms
± 10% (meets ETSI standard)
6
OHS
1
X
26 ms
± 10% (meets Australia spark quenching spec)
5:4
Reserved
Read returns 0.
TIP/RING Voltage Adjust.
These bits affect the TIP/RING voltage on the line. Low voltage countries should use a lower
TIP/RING voltage. Raising the TIP/RING voltage can improve signal headroom.
DCV[1:0]
DCT Voltage
00
3.1V
01
3.2V
10
3.35V
3:2
DCV[1:0
11
3.5V
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