XRT79L71_1 Datasheet, PDF (65/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

REV. 1.0.0
XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
BIT NUMBER
NAME
4-0
Transmit UTOPIA Port
Number[4:0]
TYPE
R/W
DESCRIPTION
Transmit UTOPIA Port Number[4:0]:
These READ/WRITE register bits, along with the Transmit UTO-
PIA Port Address[4:0] bits (within the Transmit UTOPIA Port
Address Register (Address = 0x0593) permit the user to assign
a unique Transmit UTOPIA address to each XRT79L71.
The Transmit UTOPIA Address Assignment Procedure:
In order to assign a UTOPIA Address to a given Channel (or
Port) within the XRT79L71, the user must do the following.
a. Write the value corresponding to a given XRT79L71
Channel into this register.
b. Write the corresponding UTOPIA Address value into the
Transmit UTOPIA Port Address Register (Address =
0x0593).
Once this two-step procedure has been executed, then the
XRT79L71 Channel (as specified during step a) will be assigned
the Transmit UTOPIA Address value (as specified during step b).
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