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DP83821 датащи(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали DP83821
подробное описание детали  10/100/1000 Mb/s PCI Ethernet Network Interface Controller
PDF  86 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83821 датащи(HTML) 10 Page - National Semiconductor (TI)

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3.0 Functional Description
DP83821 consists of a PCI bus interface, BIOS ROM and
EEPROM interfaces, Receive and Transmit Data Buffer
Managers, an 802.3 Media Access Controller (MAC),
SRAM, and miscellaneous support logic.
Figure 3-1
DP83821 Functional Block Diagram
3.1 DP83821
The DP83821 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 DP83821
supports an external 10/100/1000 physical layer device.
DP83821 contains the following major design elements:
— a PCI bus interface,
— an EEPROM interface, for access to an NMC93C06
EEPROM,
— 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.
This following section provides a functional overview of
interfaces of the DP83821.
Rx Filter
Tx Buffer Manager
Rx Buffer Manager
MIB
Tx MAC
Rx MAC
PCI Bus
Interface
Data FIFO
Data FIFO
93C06
Serial
EEPROM
DP83821
32
15
32
32
32
32
32
32
32
32
8
8
32
Boot ROM/
Flash
MII
MGMT
SRAM



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