LAN9311 Datasheet, PDF (21/461 Pages) SMSC Corporation – Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

include: set top boxes (cable, satellite and IP), digital televisions, digital video recorders, voice over IP and video phone systems, home gateways, and
test and measurement equipment.
2.2
Block Diagram
To Ethernet
To Ethernet
IEEE 1588
Time Stamp
10/100
PHY
Registers
MII
MDIO
IEEE 1588
Time Stamp
10/100
PHY
Registers
MII
MDIO
10/100
MAC
10/100
MAC
GPIO/LED
Controller
LAN9311/LAN9311i
Switch Engine
Buffer Manager
10/100
MAC
Search
Engine
Frame
Buffers
IEEE 1588
Time Stamp
Switch Fabric
Switch
Registers
(CSRs)
System
Registers
(CSRs)
IEEE 1588
Time Stamp
Clock/Events
System
Interrupt
Controller
System _{GP Timer}
Clocks/
Reset/PME _Free-Run
Controller Clk
MII
Host MAC
TX/RX FIFOs
Virtual PHY
Registers
MDIO
Register
Access
MUX
Host Bus Interface
EEPROM Loader
To 16-bit
Host Bus
EEPROM Controller
I²C (master)
Microwire (master)
I²C/Microwire
To optional
EEPROM
To optional GPIOs/LEDs
IRQ
External
25MHz Crystal
Figure 2.1 Internal LAN9311/LAN9311i Block Diagram