XRT74L73 Datasheet, PDF (79/488 Pages) Exar Corporation – 3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

PRELIMINARY
XRT74L73
3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.0.1
TRANSMIT UTOPIA PORT ADDRESS REGISTER (ADDRESS = 0X0593)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Unused
Transmit 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
Transmit UTOPIA Port
Address[4:0]
TYPE
R/O
R/W
DESCRIPTION
Transmit UTOPIA Port Address[4:0]:
These READ/WRITE register bits, along with the "Transmit
UTOPIA Port Number[4:0]" bits (within the "Trasnmit UTOPIA
Port Number" Register (Address = 0x0597) permit the user to
assign a unique Transmit UTOPIA address 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 Transmit 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 "Transmit UTOPIA Port Number"
Register (Address = 0x0597).
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 "Transmit UTOPIA Address" value (as specified
during step "b").
TRANSMIT UTOPIA PORT NUMBER REGISTER (ADDRESS = 0X0597)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Unused
Transmit 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
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