lan9303 Standard Microsystems Corp., lan9303 Datasheet - Page 16

• Manufacturer Part Number: lan9303
• Description: Small Form Factor Three Port 10/100 Managed Ethernet Switch With Single Mii/rmii/turbo Mii
• Manufacturer: Standard Microsystems Corp.

2.2
Ethernet
Ethernet
LAN9303/
LAN9303i
10/100
10/100
PHY
Registers
PHY
Registers
Block Diagram
MDIO
MII
MDIO
MII
To optional GPIOs/LEDs
10/100
10/100
GPIO/LED
Controller
MAC
MAC
Buffer Manager
Switch Engine
Controller
Switch Fabric
Interrupt
System
IRQ
Search
Buffers
Engine
Frame
25MHz Crystal
Reset/PME
Controller
External
System
Clocks/
Figure 2.1 Internal Block Diagram
Registers
(CSRs)
10/100
Switch
MAC
GP Timer
Free-Run
Clk
Mode Configuration
Registers
System
(CSRs)
Data
Path
Straps
MII
MII/Turbo MII to PHY or
MII/RMII/Turbo MII to MAC
Register
Access
MUX
EEPROM Controller
PHY Management
EEPROM Loader
Virtual PHY
Interface (PMI)
SMI (slave)
I
Controller
Controller
2
I
2
C (master)
C Slave
Registers
MDIO
MDIO
MDIO
Mode
MUX
MII
I
2
C
MDIO
Mode Configuration
Straps
To optional SMI Master
To optional CPU
serial management
(via I
To optional EEPROM
(via I
2
2
C master)
C slave)