XRT79L71 Datasheet, PDF (107/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
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
XRT79L71
REV. P1.0.3
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 UTO-
PIA 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 XRT79L71 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 XRT79L71 device, the user must do the follow-
ing.
a. Write the value corresponding to a given XRT79L71
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
XRT79L71 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
95