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参数资料
型号： IDT82V2084PF8
厂商： IDT, Integrated Device Technology Inc
文件页数： 32/75页
文件大小： 0K
描述： IC LIU T1/J1/E1 4CH 128-TQFP
标准包装： 1,000
类型： 线路接口装置（LIU）
规程： E1
电源电压： 3.13 V ~ 3.47 V
安装类型： 表面贴装
封装/外壳： 128-LQFP
供应商设备封装： 128-TQFP（14x20）
包装： 带卷 (TR)
其它名称： 82V2084PF8
38
INDUSTRIAL
TEMPERATURE RANGES
QUAD CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
4.2.3
TRANSMIT PATH CONTROL REGISTERS
1. In internal impedance matching mode, for E1/75
cable impedance, the PULS[3:0] bits (TCF1, 03H...) should be set to ‘0000’. In external impedance matching
mode, for E1/75
cable impedance, the PULS[3:0] bits should be set to ‘0001’.
Table-31 TCF0: Transmitter Configuration Register 0
(R/W, Address = 02H,42H,82H,C2H)
Symbol
Bit
Default
Description
-
7-5
000
Reserved
T_OFF
4
0
Transmitter power down enable
= 0: Transmitter power up
= 1: Transmitter power down and line driver high impedance
TD_INV
3
0
Transmit data invert
= 0: data on TDn or TDPn/TDNn is active high
= 1: data on TDn or TDPn/TDNn is active low
TCLK_SEL
2
0
Transmit clock edge select
= 0: data on TDn or TDPn/TDNn is sampled on the falling edges of TCLKn
= 1: data on TDn or TDPn/TDNn is sampled on the rising edges of TCLKn
T_MD[1:0]
1-0
00
Transmitter operation mode control bits which select different stages of transmit data path
= 00: enable HDB3/B8ZS encoder and waveform shaper blocks, input on TDn is single rail NRZ data
= 01: enable AMI encoder and waveform shaper blocks, input on pin TDn is single rail NRZ data
= 1x: encoder is bypassed, dual rail NRZ transmit data input on pin TDPn/TDNn
Table-32 TCF1: Transmitter Configuration Register 1
(R/W, Address = 03H,43H,83H,C3H)
Symbol
Bit
Default
Description
-
7-6
00
Reserved. This bit should be ‘0’ for normal operation.
DFM_OFF
5
0
Transmit driver failure monitor disable
= 0: DFM is enabled
= 1: DFM is disabled
THZ
4
1
Transmit line driver high impedance enable
= 0: normal state
= 1: transmit line driver high impedance enable (other transmit path still in normal state)
PULS[3:0]
3-0
0000
These bits select the transmit template/LBO for short-haul/long-haul applications.
T1/E1/J1
TCLK
Cable
Impedance
Cable Range
or LBO
Cable Loss
00001
E1
2.048 MHz
75
-
0~43 dB (default)
0001
E1
2.048 MHz
120
-0~43 dB
0010
DSX1
1.544 MHz
100
0~133 ft
0~0.6 dB
0011
DSX1
1.544 MHz
100
133~266 ft
0.6~1.2 dB
0100
DSX1
1.544 MHz
100
266~399 ft
1.2~1.8 dB
0101
DSX1
1.544 MHz
100
399~533 ft
1.8~2.4 dB
0110
DSX1
1.544 MHz
100
533~655 ft
2.4~3.0 dB
0111
J1
1.544 MHz
110
0~655 ft
0~3.0 dB
1000
DS1
1.544 MHz
100
0 dB LBO
0~36 dB
1001
DS1
1.544 MHz
100
-7.5 dB LBO
0~28.5 dB
1010
DS1
1.544 MHz
100
-15 dB LBO
0~21 dB
1011
DS1
1.544 MHz
100
-22.5 dB LBO
0~13.5 dB
11xx
User programmable waveform setting
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