參數(shù)資料
型號(hào): IDT82V2052EPFG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 35/70頁
文件大?。?/td> 0K
描述: IC LIU E1 2CH SHORT HAUL 80-TQFP
標(biāo)準(zhǔn)包裝: 45
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: 80-LQFP
供應(yīng)商設(shè)備封裝: 80-TQFP(14x14)
包裝: 托盤
其它名稱: 82V2052EPFG
IDT82V2052E
DUAL CHANNEL E1 SHORT HAUL LINE INTERFACE UNIT
PROGRAMMING INFORMATION
40
December 12, 2005
4.3.4
TRANSMIT PATH CONTROL REGISTERS
1. In internal impedance matching mode, for E1/75
cable impedance, the PULS[3:0] bits (TCF1, 05H...) 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-21 TCF0: Transmitter Configuration Register 0
(R/W, Address = 04H, 24H)
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 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 TDPn/TDNn is sampled on the falling edge of TCLKn
= 1: Data on TDPn/TDNn is sampled on the rising edge of TCLKn
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 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-22 TCF1: Transmitter Configuration Register 1
(R/W, Address = 05H, 25H)
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
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