lan9311 Standard Microsystems Corp., lan9311 Datasheet - Page 21

• Manufacturer Part Number: lan9311
• Description: Lan9311/lan9311i Two Port 10/100 Managed Ethernet Switch With 16-bit Non-pci Cpu Interface
• Manufacturer: Standard Microsystems Corp.

2.2
To Ethernet
To Ethernet
LAN9311/LAN9311i
Block Diagram
10/100
10/100
PHY
Registers
PHY
Registers
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
Figure 2.1 Internal LAN9311/LAN9311i Block Diagram
Switch Engine
Clock/Events
Time Stamp
IEEE 1588
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 16-bit
Host Bus
To optional
EEPROM
2
C/Microwire