DS33ZH11+ Maxim Integrated Products, DS33ZH11+ Datasheet - Page 39

• Manufacturer Part Number: DS33ZH11+
• Description: IC MAPPER ETHERNET 100CSBGA
• Manufacturer: Maxim Integrated Products

Specifications of DS33ZH11+

• Applications: Data Transport
• Interface: Serial
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Package / Case: 100-LBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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 8-3 Registers Related to Connections and Queues
Register
AR.TQSC1
AR.RQSC1
GL.TRQIE
GL.TRQIS
LI.TQTIE
LI.TQCTLS
SU.QRIE
SU.QCRLS
GL.C1QPR
8.11 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.
GL.CON1
•
•
•
•
•
Set up the queue sizes for both transmit and receive queue (AR.TQSC1 and AR.RQSC1).
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.
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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