參數(shù)資料
型號(hào)： IDT82V2051EPP8
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 29/61頁
文件大?。?/td> 0K
描述： IC LIU E1 SGL SHORT HAUL 44-TQFP
標(biāo)準(zhǔn)包裝： 1,250
類型： 線路接口裝置（LIU）
規(guī)程： E1
電源電壓： 3.13 V ~ 3.47 V
安裝類型： 表面貼裝
封裝/外殼： 44-LQFP
供應(yīng)商設(shè)備封裝： 44-TQFP（10x10）
包裝： 帶卷 (TR)
其它名稱： 82V2051EPP8
IDT82V2051E
SINGLE CHANNEL E1 SHORT HAUL LINE INTERFACE UNIT
Programming Information
35
December 9, 2005
4.3.2
TRANSMIT PATH CONTROL REGISTERS
1. In internal impedance matching mode, for E1/75
cable impedance, the PULS[3:0] bits (TCF1, 06H) 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-19 TCF0: Transmitter Configuration Register 0
(R/W, Address = 05H)
Symbol
Bit
Default
Description
-
7-5
000
Reserved.
T_OFF
4
0
Transmitter power down enable
= 0: Transmitter power up
= 1: Transmitter power down (line driver high impedance)
TD_INV
3
0
Transmit data invert
= 0: Data on TD or TDP/TDN is active high
= 1: Data on TD or TDP/TDN is active low
TCLK_SEL
2
0
Transmit clock edge select
= 0: Data on TDP/TDN is sampled on the falling edge of TCLK
= 1: Data on TDP/TDN is sampled on the rising edge of TCLK
T_MD[1:0]
0-1
00
Transmitter operation mode control
T_MD[1:0] select different stages of the transmit data path
= 00: Enable HDB3 encoder and waveform shaper blocks. Input on pin TD is single rail NRZ data
= 01: Enable AMI encoder and waveform shaper blocks. Input on pin TD is single rail NRZ data
= 1x: Encoder is bypassed, dual rail NRZ transmit data input on pin TDP/TDN
Table-20 TCF1: Transmitter Configuration Register 1
(R/W, Address = 06H)
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 work normally)
PULS[3:0]
3-0
0000
These bits select the transmit template:
TCLK
Cable impedance
Allowable Cable loss
00001
2.048 MHz
75
0-24 dB
0001
2.048 MHz
120
0-24 dB
0010 - 1011
Reserved
11XX
User programmable waveform setting
Table-21 TCF2: Transmitter Configuration Register 2
(R/W, Address = 07H)
Symbol
Bit
Default
Description
-
7-6
00
Reserved.
SCAL[5:0]
5-0
100001
SCAL specifies a scaling factor to be applied to the amplitude of the user-programmable arbitrary pulses which is
to be transmitted if needed. The default value of SCAL[5:0] is ‘100001’. Refer to 3.2.3.2 User-Programmable Arbi-
= 100001: Default value for 75
and 120 . One step change of this value results in 3% scaling up/down against
the pulse amplitude.
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