XRT74L74 Datasheet, PDF (88/498 Pages) Exar Corporation – 4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

XRT74L74
4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.1.1
PRELIMINARY
BIT NUMBER
NAME
4-0
Receive UTOPIA Port
Number[4:0]
TYPE
R/W
DESCRIPTION
Receive UTOPIA Port Number[4:0]:
These READ/WRITE register bits, along with the "Receive UTO-
PIA Port Address[4:0]" bits (within the "Receive UTOPIA Port
Address" Register (Address = 0x0513) permit the user to assign
a unique Receive UTOPIA address to the XRT74L74 device.
The Receive UTOPIA Address Assignment Procedure:
In order to assign a UTOPIA Address to a given Channel (or
Port) within the XRT74L74 device, the user must do the follow-
ing.
a. Write the value corresponding to a given XRT74L74
Channel into this register.
b. Write the corresponding UTOPIA Address value into the
"Receive UTOPIA Port Address" Register (Address =
0x0513).
Once this "two-step" procedure has been executed, then the
XRT74L74 Channel (as specified during step "a") will be
assigned the "Receive UTOPIA Address" value (as specified
during step "b").
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