LAN9313 Datasheet, PDF (19/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

2.2
Block Diagram
To Ethernet
IEEE 1588
Time Stamp
10/100
PHY
Registers
MII
MDIO
To Ethernet
IEEE 1588
Time Stamp
10/100
PHY
Registers
MII
MDIO
10/100
MAC
10/100
MAC
Switch Engine
Buffer Manager
Search
Engine
Frame
Buffers
10/100
MAC
Switch Fabric
Switch
Registers
(CSRs)
IEEE 1588
Time Stamp
System
Registers
(CSRs)
GPIO/LED
Controller
LAN9313/LAN9313i
IEEE 1588
Time Stamp
Clock/Events
System
Interrupt
Controller
System _{GP Timer}
Clocks/
Reset/PME _Free-Run
Controller Clk
Register
Access
MUX
Virtual PHY
Registers
MDIO
MII
PHY Management ^MDIO
Interface (PMI)
MII
Mode
MUX
SMI (slave)
Controller
MDIO
MDIO
MII
SPI (slave)
I²C (slave)
Controller
SPI/I²C
To optional PHY, MAC,
or SMI Master
Management Mode
Configuration Straps
To optional CPU
serial management
(via I²C/SPI slave)
EEPROM Loader
EEPROM Controller
I²C (master)
Microwire (master)
I²C/Microwire
To optional EEPROM
(via I²C/Microwire master)
To optional GPIOs/LEDs
IRQ
External
25MHz Crystal
Figure 2.1 Internal LAN9313/LAN9313i Block Diagram