XRT74L73 Datasheet, PDF (74/488 Pages) Exar Corporation – 3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

XRT74L73
3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.0.1
PRELIMINARY
RECEIVE UTOPIA PORT ADDRESS REGISTER (ADDRESS = 0X0513)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Unused
Receive UTOPIA Port Address[4:0]
R/O
R/O
R/O
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
BIT 0
R/W
0
BIT NUMBER
NAME
7-5
Unused
4-0
Receive UTOPIA Port
Address[4:0]
TYPE
R/O
R/W
DESCRIPTION
Receive UTOPIA Port Address[4:0]:
These READ/WRITE register bits, along with the "Receive UTO-
PIA Port Number[4:0]" bits (within the "Receive UTOPIA Port
Number" Register (Address = 0x0517) permit the user to assign
a unique Receive UTOPIA address to each of the XRT74L73
device.
For UTOPIA Level 2/3 applications, the user can write in any
value, ranging from 0x00 through 0x1E into this register.
The Receive UTOPIA Address Assignment Procedure:
In order to assign a UTOPIA Address to a given Channel (or
Port) within the XRT74L73 device, the user must do the follow-
ing.
a. Write the value corresponding to a given XRT74L73
Channel into the "Receive UTOPIA Port Number" Register
(Address = 0x0517).
b. Write the corresponding UTOPIA Address value into this
register.
Once this "two-step" procedure has been executed, then the
XRT74L73 Channel (as specified during step "a") will be
assigned the "Receive UTOPIA Address" value (as specified
during step "b").
RECEIVE UTOPIA PORT NUMBER REGISTER (ADDRESS = 0X0517)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Unused
Receive UTOPIA Port Number[4:0]
R/O
R/O
R/O
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
BIT 0
R/W
0
BIT NUMBER
NAME
7-5
Unused
TYPE
R/O
DESCRIPTION
75