LAN9420I-NU Standard Microsystems (SMSC), LAN9420I-NU Datasheet - Page 105

• Manufacturer Part Number: LAN9420I-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9420I-NU

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
SMSC LAN9420/LAN9420i
4.3.2
BITS
31:0
Transmit Poll Demand (TPD)
When written with any value, the DMAC will check for frames to be
transmitted. If no descriptor is available, the transmit process returns to the
suspended state and bit 2 of the DMAC_STATUS register (transmit buffer
unavailable - TU) is not asserted. A write to this register is only effective if
the transmit process is in the suspended state. A Read of this register will
timeout and invalid data will be returned.
Transmit Poll Demand Register (TX_POLL_DEMAND)
This register enables the TX DMA engine to check for new descriptors.
Offset:
DESCRIPTION
0004h
DATASHEET
105
Size:
32 bits
TYPE
WO
Revision 1.4 (12-17-08)
DEFAULT
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