lan9312 Standard Microsystems Corp., lan9312 Datasheet - Page 21

• Manufacturer Part Number: lan9312
• Description: Lan9312 High Performance Two Port 10/100 Managed Ethernet Switch With 32-bit Non-pci Cpu Interface
• Manufacturer: Standard Microsystems Corp.

2.2
To Ethernet
To Ethernet
LAN9312
Block Diagram
10/100
10/100
Registers
Registers
PHY
PHY
Time Stamp
Time Stamp
IEEE 1588
IEEE 1588
MDIO
MDIO
MII
MII
To optional GPIOs/LEDs
GPIO/LED
Controller
10/100
10/100
MAC
MAC
Buffer Manager
Switch Engine
Clock/Events
Time Stamp
IEEE 1588
Figure 2.1 Internal LAN9312 Block Diagram
Switch Fabric
Search
Engine
Buffers
Frame
Controller
Interrupt
System
IRQ
Registers
(CSRs)
10/100
Switch
MAC
25MHz Crystal
Reset/PME
Controller
External
System
Clocks/
Time Stamp
IEEE 1588
Registers
System
(CSRs)
GP Timer
Free-Run
Clk
Register
Access
MUX
MII
TX/RX FIFOs
Host MAC
EEPROM Controller
Host Bus Interface
EEPROM Loader
Microwire (master)
I
2
MDIO
C (master)
Virtual PHY
Registers
I
To 32-bit
Host Bus
To optional
EEPROM
2
C/Microwire