LAN9312-NZW Standard Microsystems (SMSC), LAN9312-NZW Datasheet - Page 137

• Manufacturer Part Number: LAN9312-NZW
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9312-NZW

• Lead Free Status / RoHS Status: Supplier Unconfirmed

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Chapter 10 Serial Management
SMSC LAN9312
10.1
10.2
eeprom_type_strap
eeprom_type_strap
TYPE/MODE
I
EEPROM
2
EEPROM
Microwire
EEPROM
C Master
Master
Mode
Mode
= 1
= 0
This chapter details the LAN9312 serial management functionality of the I
Controller and the supporting EEPROM Loader.
The I
external EEPROM with the system register bus and the EEPROM Loader. Multiple types
(I
and size are accomplished via the eeprom_type_strap and eeprom_size_strap[1:0] configuration straps
respectively. Various commands are supported for each EEPROM type, allowing for the storage and
retrieval of static data. The I
The EEPROM Loader provides the automatic loading of configuration settings from the EEPROM into
the LAN9312 at reset. The EEPROM Loader module interfaces to the EEPROM Controller, Ethernet
PHYs, and the system CSRs.
Based on the configuration strap eeprom_type_strap, the I
either Microwire or I
and characteristics differ dependant on the selected EEPROM type as summarized in
Note: When the EEPROM Loader is running, it has exclusive use of the I
Functional Overview
I
2
2
C/Microwire) and sizes of external EEPROMs are supported. Configuration of the EEPROM type
C/Microwire Master EEPROM Controller
Table 10.1 I
2
EE_SDA
Input enabled
(to I
Open-drain output
(from I
Pull-down disabled
EEDI
Input enabled
(to Microwire master)
Output disabled
Pull-down enabled
C/Microwire EEPROM controller is an I
EE_SDA/EEDI PIN
controller. Refer to
2
C master)
2
C master)
2
C/Microwire Master Serial Management Pins Characteristics
2
C compatible EEPROMs. The I
Section 10.2.4, "EEPROM Loader"
2
C interface conforms to the Philips I
NOT USED
Input enabled
(used for straps)
Output enabled
(driven low)
EEDO
Input enabled
(used for straps)
Output enabled (from
Microwire master)
DATASHEET
EEDO PIN
137
2
C/Microwire master module which interfaces an optional
2
C/Microwire serial management pins functionality
NOT USED
Input enabled
(used for straps)
Output enabled
(driven low)
EECS
Input enabled
(used for straps)
Output enabled (from
Microwire master)
2
EECS PIN
C/Microwire EEPROM controller supports
for more information.
2
C-Bus Specification .
2
2
C/Microwire EEPROM
EE_SCL/EECLK PIN
EE_SCL
Input enabled
(to I
used for straps)
Open-drain output
(from I
EECLK
Input enabled
(used for straps)
Output enabled (from
Microwire master)
C/Microwire EEPROM
Revision 1.7 (06-29-10)
2
C master and
2
C master)
Table
10.1.