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DP83820BVUW-AB View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
DP83820BVUW-AB 10/100/1000 Mb/s PCI Ethernet Network Interface Controller National-Semiconductor
National ->Texas Instruments National-Semiconductor
DP83820BVUW-AB Datasheet PDF : 87 Pages
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3.0 Functional Description
DP83820 consists of a PCI bus interface, BIOS ROM and Managers, an 802.3 Media Access Controller (MAC),
EEPROM interfaces, Receive and Transmit Data Buffer SRAM, and miscellaneous support logic.
32
15
64
PCI Bus
Interface
64
32
64
32
32
Data FIFO
64
8
Tx MAC
Tx Buffer Manager
Data FIFO
64
8
Rx MAC
Rx Buffer Manager
MIB
Rx Filter
64
SRAM
DP83820
MII
MGMT
93C06
Serial
EEPROM
Boot ROM/
Flash
Figure 3-1 DP83820 Functional Block Diagram
3.1 DP83820
The DP83820 device is an enhanced version of the NSC
MacPhyter MAC/BIU (Media Access Controller/Bus
Interface Unit) which has been modified for 1000 Mb/s
operation with additional buffering, higher bandwidth PCI
bus implementation, and the Gigabit Media Independent
Interface for 1000BASE-T phy support. The DP83820
supports an external 10/100/1000 physical layer device.
DP83820 contains the following major design elements:
a PCI bus interface,
a buffer management scheme that is simple, efficient
and flexible,
separate receive and transmit FIFOs and DMA
controllers,
a 10/100/1000 Mb/s Ethernet Media Access Control
(MAC),
a Physical Layer Interface (MII/GMII/TBI),
Management Information Base (MIB) Statistics
Registers,
Receive Packet filtering logic.
an EEPROM interface, for access to an NMC93C06 This following section provides a functional overview of
EEPROM,
interfaces of the DP83820.
9
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