IDT82V2084 Integrated Device Technology, IDT82V2084 Datasheet - Page 53

• Manufacturer Part Number: IDT82V2084
• Description: Quad Channel T1/e1/j1 Long Haul/ Short Haul Line Interface Unit
• Manufacturer: Integrated Device Technology

QUAD CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
4.2.10 TRANSMIT AND RECEIVE TERMINATION REGISTER
Table-55 TERM: Transmit and Receive Termination Configuration Register
T_TERM[2:0]
R_TERM[2:0]
Symbol
-
(R/W, Address = 1AH, 5AH,9AH,DAH)
7-6
5-3
2-0
Bit
Default
000
000
00
These bits select the internal termination for transmit line impedance matching.
Reserved
= 000: internal 75 Ω impedance matching
= 001: internal 120 Ω impedance matching
= 010: internal 100 Ω impedance matching
= 011: internal 110 Ω impedance matching
=1xx: Selects external impedance matching resistors for E1 mode only. T1/J1 does not require external imped-
These bits select the internal termination for receive line impedance matching.
= 000: internal 75 Ω impedance matching
= 001: internal 120 Ω impedance matching
= 010: internal 100 Ω impedance matching
= 011: internal 110 Ω impedance matching
= 1xx: Selects external impedance matching resistors (see Table-15).
ance resistors (see Table-14).
53
Description
TEMPERATURE RANGES
INDUSTRIAL