LAN9420 Datasheet, PDF (11/171 Pages) SMSC Corporation – Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
Chapter 1 Introduction
1.1 Block Diagrams
PCI Host
PCI Bus
LAN9420/LAN9420i
EEPROM
(optional)
To Ethernet
Magnetics
GPIOs/LEDs
(optional)
PCI Device
External
25MHz Crystal
PCI Device
Figure 1.1 System Level Block Diagram
PCI Bridge (PCIB)
PCI
PCI Master
PCI Target
DMA Controller
Arbiter
TX DMA Engine
RX DMA Engine
DMA Control &
Status Registers
(DCSR)
Ethernet MAC
TX FIFO (2KB)
TX COE
RX FIFO (2KB)
RX COE
MAC
MAC Interface Layer
(MIL)
MAC Control & Status
Registers (MCSR)
10/100
Ethernet
PHY
Ethernet
Interrupt
Controller
(INT)
Power
Management
(PM)
System Control &
Status Registers
(SCSR)
System Control Block (SCB)
EEPROM
Controller
(EPC)
GPIO/LED
Controller
(G P IO )
GP Timer
Free-Run
Counter
3.3V to 1.8V
Regulator
PLL
LAN9420/LAN9420i
EEPROM
(optional)
GPIOs/LEDs
(optional)
Figure 1.2 LAN9420/LAN9420i Internal Block Diagram
+3.3V
25MHz
SMSC LAN9420/LAN9420i
11
DATASHEET
Revision 1.6 (07-18-11)