XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 454

• Manufacturer Part Number: XRT94L33IB-L
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L33IB-L

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 3.14 V ~ 3.47 V
• Package / Case: 504-LBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT94L33
Rev.1.2.0.
Receive UTOPIA Port Number Register (Address = 0x0517)
2.3.5.1.2.6
The XRT94L33 can be configured to function as a four channel ATM UNI over either an STS-3 or an STS-3c
signal. As a consequence, for Multi-PHY Operation, the XRT94L33 can be assigned as many as three
“Receive UTOPIA Addresses” at a given time (one for each STS-1 channel).
The user can assign a “Receive UTOPIA Address” value to a given channel, within the XRT94L33 by
executing the following steps.
STEP 1 – Assign a “Receive UTOPIA Address” to Channel 0
The user can accomplish this by doing the following.
STEP 1a – Set Bits 0 through 4 (“Rx_UTOPIA_Port_Number[4:0]”) within the “Receive UTOPIA Port
Number Register” to “0x00”; as depicted below.
Receive UTOPIA Port Number Register (Address = 0x0517)
This step configures an internal “Receive UTOPIA Address assignment” pointer to point to “STS-3c Channel
0” within the XRT94L33.
STEP 1b – Set Bits 0 through 4 (“Rx_UTOPIA_Addr[4:0]”) within the “Receive UTOPIA Address”
Register to the desired “Multi-PHY” Address value for this channel [a4, a3, a2, a1, a0]; as depicted
below.
Receive UTOPIA Address Register (Address = 0x0513)
This step configures the Receive UTOPIA Address, of the value [A4, A3, A2, A1, A0] to be assigned to
Channel 0.
Notes:
During this step, the user can write in any value, between 0x00 and 0x1E, provided this “Multi-PHY Address” is unique
Use of the value “0x1F” is NOT permitted.
These steps do not assign a Transmit UTOPIA Address value to the STS-3c Channel 0. This assignment must be
B
B
B
R/O
R/O
RO
among all of the Receive UTOPIA Interface Addresses within a “Multi-PHY” system.
performed separately per the “Transmit UTOPIA Address” assignment instructions, presented in Section _.
IT
IT
IT
0
0
0
7
7
7
Unused
Assigning Receive UTOPIA Addresses to Each STS-3c Channel within the XRT94L33
Unused
Unused
B
B
B
R/O
R/O
RO
IT
IT
IT
0
0
0
6
6
6
B
B
B
R/O
R/O
RO
IT
IT
IT
0
0
0
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
5
5
5
B
B
B
R/W
R/W
R/W
A4
IT
IT
IT
X
0
4
4
4
454
B
B
B
R/W
R/W
R/W
A3
IT
X
IT
IT
0
Rx_UTOPIA_Port_Number[4:0]
Rx_UTOPIA_Port_Number[4:0]
3
3
3
Rx_UTOPIA_Addr[4:0]
B
B
B
R/W
R/W
R/W
A2
IT
IT
IT
X
0
2
2
2
B
B
B
R/W
R/W
R/W
A1
IT
X
IT
IT
0
1
1
1
xr
B
B
B
R/W
R/W
R/W
A0
IT
IT
IT
X
0
0
0
0