lan9303m Standard Microsystems Corp., lan9303m Datasheet - Page 16

• Manufacturer Part Number: lan9303m
• Description: Small Form Factor Three Port 10/100 Managed Ethernet Switch With Dual Mii/rmii/turbo Mii
• Manufacturer: Standard Microsystems Corp.

Turbo MII to MAC
2.2
PHY or MII/RMII/
MII/Turbo MII to
Ethernet
Ethernet
Block Diagram
LAN9303M/
LAN9303Mi
10/100
10/100
Mux/
PHY
Registers
Data
Path
PHY
Registers
MII
MII
Mode Configuration
Straps
MDIO
MII
MII
MDIO
To optional GPIOs/LEDs
10/100
10/100
GPIO/LED
Controller
MAC
MAC
Buffer Manager
Switch Engine
Controller
Switch Fabric
Interrupt
System
IRQ
Search
Engine
Buffers
25MHz Crystal
Frame
Figure 2.1 Internal Block Diagram
Reset/PME
Controller
External
System
Clocks/
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)
Controller
I
Controller
2
I
2
C (master)
C Slave
Registers
MDIO
MDIO
MDIO
Mode
MUX
MII
I
2
C
MDIO
To optional SMI Master
Mode Configuration
Straps
To optional EEPROM
(via I
To optional CPU
serial management
(via I
2
2
C master)
C slave)