lan9303 Standard Microsystems Corp., lan9303 Datasheet - Page 112

• Manufacturer Part Number: lan9303
• Description: Small Form Factor Three Port 10/100 Managed Ethernet Switch With Single Mii/rmii/turbo Mii
• Manufacturer: Standard Microsystems Corp.

Revision 1.3 (08-27-09)
(E2P_CMD)
The READ command is executed by setting the
EEPROM Command Register
EEPROM Controller Busy (EPC_BUSY)
be read from the
The RELOAD operation is performed by writing the RELOAD command into the
Command (EPC_COMMAND)
is executed by setting the
Register
(EPC_BUSY)
If an operation is attempted and the EEPROM device does not respond within 30mS, the device will
time-out, and the
Register (E2P_CMD)
Figure 8.6
EPC_BUSY = 0
(E2P_CMD). In all cases, the software must wait for the
illustrates the process required to perform an EEPROM read or write operation.
must be configured with the desired command value and the read address, respectively.
bit to clear before modifying the
EEPROM Data Register
EEPROM Write
EEPROM Controller Timeout (EPC_TIMEOUT)
Figure 8.6 EEPROM Access Flow Diagram
E2P_DATA
E2P_CMD
E2P_CMD
will be set.
Register
Register
Register
Write
Write
Read
Idle
EEPROM Controller Busy (EPC_BUSY)
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
field of the
(E2P_CMD). The completion of the operation is indicated when the
DATASHEET
bit is cleared, at which time the data from the EEPROM may
112
(E2P_DATA).
EEPROM Command Register
EEPROM Command Register
EEPROM Controller Busy (EPC_BUSY)
EEPROM Read
E2P_DATA
E2P_CMD
E2P_CMD
Register
Register
Register
Write
Read
Read
Idle
bit of the
EPC_BUSY = 0
bit of the
EEPROM Controller Busy
(E2P_CMD). The command
(E2P_CMD).
SMSC LAN9303/LAN9303i
EEPROM Command
EEPROM Command
EEPROM Controller
Datasheet
bit of the