XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 145

• 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

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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
1.5
The XRT94L33 can be configured to function a wide variety of operating modes.
summarizes and describes the procedure that one should employ in order to configure the XRT94L33 into
each of these modes.
In all, the XRT94L33 can be configured to function in any of the following modes.
• 1 Channel STS-3c and up to 2 Channel DS3/E3 ATM UNI/PPP Mode
• 1-Channel STS-3 (e.g., 3 Channels of ATM UNI/PPP over STS-1, which is in-turn is mapped into STS-3)
Mode
• 1-Channel STS-3 (e.g., 3 Channels of ATM UNI/PPP over DS3/E3, which is in-turn, mapped into STS-3)
Mode
Each of these operating modes is described below.
1.5.1
If the user configures the XRT94L33 to operate in this mode, then the XRT94L33 will function as an ATM
UNI/PPP device that supports ATM cell or PPP packet transmission and reception over one STS-3c channel
and possibly as many as two additional DS3/E3 channels, in parallel. Since the UTOPIA and POS-PHY
interfaces, within the XRT94L33 support Multi-PHY Operation, the ATM Layer Processor will have no problem
writing ATM Cell/PPP Packet data into and reading ATM Cell/PPP Packet data from the UTOPIA/POS-PHY
Interface.
Figure 8 presents the functional block diagram of the XRT94L33, if it is configured to operate in this
mode.
SOME NOTES ABOUT THE ABOVE FIGURE
Figure 8 indicates that the XRT94L33 is functioning as a 1-Channel STS-3c ATM UNI/PPP device. The
existence of the two DS3/E3 channels are not depicted in this illustration. Nonetheless, whenever the
XRT94L33 is operating in this mode, these additional DS3/E3 channels are available for the transmission of
ATM cell or PPP packet.
XRT94L33 – Channel 0
AN OVERVIEW OF POSSIBLE CONFIGURATION OPTIONS IN THE XRT94L33
Interface
Telecom
Interface
Interface
Telecom
Interface
STS-3
PECL
STS-3
Block
Block
STS-3
PECL
STS-3
STS-3
Block
Block
Block
Bus
1-C
CDR
STS-3
Block
Bus
CDR
HANNEL
STS-3
Processor
Transmit
Processor
Processor
Transmit
STS-3
Processor
Block
Receive
TOH
STS-3
STS-3
Microprocessor
C AND UP TO
Block
Receive
Block
TOH
TOH
STS-3
Microprocessor
Block
TOH
Interface
Interface
Block
Block
2 C
Processor
Processor
Transmit
HANNELS
Processor
Processor
Transmit
Receive
STS-3c
STS-3c
Receive
Block
Block
STS-3c
STS-3c
POH
POH
Block
Block
Synthesizer
POH
POH
Synthesizer
Clock
Block
Clock
Block
145
DS3/E3 ATM UNI/PPP M
Cell Processor
Cell Processor
Cell Processor
Cell Processor
Processor
Processor
Transmit
Processor
Processor
Receive
Transmit
Transmit
Receive
Receive
Transmit
Block
Block
Receive
Block
ATM
PPP
PPP
Block
Block
Block
ATM
Block
ATM
PPP
PPP
Block
ATM
ODE
POS-PHY
POS-PHY
UTOPIA/
Transmit
UTOPIA
Interface
Transmit
Interface
Interface
Interface
POS-PHY
POS-PHY
UTOPIA/
Receive
Receive
Transmit
Transmit
UTOPIA
Interface
Interface
Interface
Interface
Receive
Receive
Block
Block
Block
Block
Block
Block
Block
Block
This section briefly
XRT94L33
Rev.1.2.0.