DS33R41 Maxim Integrated Products, DS33R41 Datasheet - Page 50

• Manufacturer Part Number: DS33R41
• Description: Network Controller & Processor ICs Inverse-Multiplexing Ethernet Mapper wit
• Manufacturer: Maxim Integrated Products

It is recommended that the user reset the queue pointers for the connection after disconnection. The pointers must
be reset before a connection is made. If this disconnect/connect procedure is not followed, incorrect data may be
transmitted. The proper procedure for setting up a connection follows:
Table 9-5. Registers Related to Connections and Queues
Connection Register for
Ethernet Interface 1
Arbiter Transmit Queue Size
Connection 1
Arbiter Receive Queue Size
Connection 1
Global Transmit Receive Queue
Interrupt Enable
Global Transmit Receive Queue
Interrupt Status
Serial Interface Transmit Queue
Cross Threshold Interrupt
Enable
Serial Interface Transmit Queue
Cross Threshold Latched Status
Receive Queue Cross
Threshold Enable
Queue Cross Threshold
Latched Status
Connection 1 Queue Pointer
Reset
9.10 Arbiter
The Arbiter manages the transport between the Ethernet port and the Serial port. It is responsible for queuing and
dequeuing packets to a single external SDRAM. The arbiter handles requests from the HDLC and MAC to transfer
data to and from the SDRAM.
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Set up the queue sizes for both transmit and receive queue
Set up the high/low thresholds and interrupt enables if desired (GL.TRQIE, LI.TQTIE, SU.QRIE)
Reset all the pointers for the connection desired (GL.C1QPR)
Set up the connections (GL.CON1)
If a connection is disconnected, reset the queue pointers after the disconnection.
REGISTER
AR.RQSC1
LI.TQCTLS
SU.QCRLS
GL.C1QPR
AR.TQSC1
GL.TRQIE
GL.TRQIS
GL.CON1
LI.TQTIE
SU.QRIE
NAME
Enables connection between the Ethernet Interface and the
Serial Interface. Note that once connection is set up, then the
queues and thresholds can be setup for that connection.
Size for the Transmit Queue in Number of 32—2K packets.
Size for the Receive Queue in Number of 32—2K packets.
Interrupt enable for items related to the connections at the
global level.
Interrupt enable status for items related to the connections at
the global level.
Enables for the Transmit queue crossing high and low
thresholds.
Latched status bits for connection high and low thresholds for
the transmit queue.
Enables for the receive queue crossing high and low
thresholds.
Latched status bits for receive queue high and low thresholds.
Resets the connection pointer.
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(AR.TQSC1
FUNCTION
and AR.RQSC1).