lan9210 Standard Microsystems Corp., lan9210 Datasheet - Page 38
lan9210
Manufacturer Part Number
lan9210
Description
Lan9210 Small Form Factor Single-chip Ethernet Controller With Hp Auto-mdix Support
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9210.pdf
(146 pages)
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Revision 2.3 (08-06-08)
3.9.2.1
If an operation is attempted, and an EEPROM device does not respond within 30mS, the LAN9210
will timeout, and the EPC timeout bit (EPC_TO) in the E2P_CMD register will be set.
Figure 3.4, "EEPROM Access Flow Diagram"
EEPROM Read or Write operation.
The host can disable the EEPROM interface through the GPIO_CFG register. When the interface is
disabled, the EEDIO and ECLK signals can be used as general-purpose outputs, or they may be used
to monitor internal MII signals.
Supported EEPROM Operations
The EEPROM controller supports the following EEPROM operations under host control via the
E2P_CMD register. The operations are commonly supported by “93C46” EEPROM devices. A
description and functional timing diagram is provided below for each operation. Please refer to the
E2P_CMD register description in
page 101
Busy Bit = 0
for E2P_CMD field settings for each command.
EEPROM Write
Figure 3.4 EEPROM Access Flow Diagram
Write Data
Command
Command
Register
Register
Register
Write
Read
Idle
DATASHEET
Section 5.3.23, "E2P_CMD – EEPROM Command Register," on
38
illustrates the host accesses required to perform an
Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support
EEPROM Read
Read Data
Command
Command
Register
Register
Register
Write
Read
Idle
Busy Bit = 0
SMSC LAN9210
Datasheet
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