參數(shù)資料
型號： IDT82V2081PP8
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 29/68頁
文件大?。?/td> 0K
描述： IC LIU T1/J1/E1 1CH 44-TQFP
標準包裝： 1,250
類型： 線路接口裝置（LIU）
規(guī)程： T1/E1/J1
電源電壓： 3.13 V ~ 3.47 V
安裝類型： 表面貼裝
封裝/外殼： 44-LQFP
供應商設備封裝： 44-TQFP（10x10）
包裝： 帶卷 (TR)
其它名稱： 82V2081PP8
35
INDUSTRIAL
TEMPERATURE RANGES
SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
4.2
REGISTER DESCRIPTION
4.2.1
CONTROL REGISTERS
Table-24 ID: Device Revision Register
(R, Address = 00H)
Symbol
Bit
Default
Description
ID[7:0]
7-0
00H
00H is for the first version.
Table-25 RST: Reset Register
(W, Address = 01H)
Symbol
Bit
Default
Description
RST[7:0]
7-0
00H
Software reset. A write operation on this register will reset all internal registers to their default values, and the status
of all ports are set to the default status. The content in this register can not be changed.
Table-26 GCF: Global Configuration Register
(R/W, Address = 02H)
Symbol
Bit
Default
Description
-
7-3
00000
Reserved.
T1E1
2
0
This bit selects the E1 or T1/J1 operation mode globally.
= 0: E1 mode is selected.
= 1: T1/J1 mode is selected.
INT_PIN[1:0]
1-0
00
Interrupt pin control
= X0: Open drain, active low (with an external pull-up resistor)
= 01: Push-pull, active low
= 11: Push-pull, active high
Table-27 TERM: Transmit and Receive Termination Configuration Register
(R/W, Address = 03H)
Symbol
Bit
Default
Description
-
7-6
00
Reserved.
T_TERM[2:0]
5-3
000
These bits select the internal termination for transmit line impedance matching.
= 000: Internal 75
impedance matching
= 001: Internal 120
impedance matching
= 010: Internal 100
impedance matching
= 011: Internal 110
impedance matching
= 1xx: Selects external impedance matching resistors for E1 mode only. T1/J1 does not require external impedance
resistors (see Table-14).
R_TERM[2:0]
2-0
000
These bits select the internal termination for receive line impedance matching.
= 000: Internal 75
impedance matching
= 001: Internal 120
impedance matching
= 010: Internal 100
impedance matching
= 011: Internal 110
impedance matching
= 1xx: Selects external impedance matching resistors (see Table-15).
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