lan9303m Standard Microsystems Corp., lan9303m Datasheet - Page 123

• Manufacturer Part Number: lan9303m
• Description: Small Form Factor Three Port 10/100 Managed Ethernet Switch With Dual Mii/rmii/turbo Mii
• Manufacturer: Standard Microsystems Corp.

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
Datasheet
SMSC LAN9303M/LAN9303Mi
8.4.4.2
8.4.4.3
8.4.4.4
8.4.5
The
as detailed in
page
re-runs the Auto-negotiation using the new default values of the
Advertisement Register (PHY_AN_ADV_x)
Note: Each of these PHY registers is written in its entirety, overwriting any previously changed bits.
Note: When any external MII mode is selected, the PHY registers for Port 1 are not updated.
Following the writes to the PHY registers, the PMI registers are reset back to their default values.
Virtual PHY Registers Synchronization
Some PHY register defaults are based on configuration straps. In order to maintain consistency
between the updated configuration strap registers and the Virtual PHY registers, the
Negotiation Advertisement Register
( V P H Y _ S P E C I A L _ C O N T R O L _ S TAT U S )
(VPHY_BASIC_CTRL)
The
defaults as detailed in
(VPHY_AN_ADV)," on page
The
with the new defaults as detailed in
(VPHY_SPECIAL_CONTROL_STATUS)," on page
The
detailed in
Additionally, the
Auto-negotiation using the new default values of the
Register (VPHY_AN_ADV)
Note: Each of these VPHY registers is written in its entirety, overwriting any previously changed bits.
Port 1 MII Basic Control Register Synchronization
Some of the defaults of the Port 1 MII Basic Control Register are based on configuration straps. In
order to maintain consistency between the updated Configuration Strap registers and the register, it is
written with the new defaults as detailed in
(P1_MII_BASIC_CONTROL)," on page
Note: The register is written in its entirety, overwriting any previously changed bits.
LED and Manual Flow Control Register Synchronization
Since the defaults of the
(MANUAL_FC_1),
Control Register (MANUAL_FC_0)
these registers with their new default values.
Register Data
Optionally following the configuration strap values, the EEPROM data may be formatted to allow
access to the device’s parallel, directly writable registers. Access to indirectly accessible registers (e.g.
Switch Engine registers, etc.) is achievable with an appropriate sequence of writes (at the cost of
EEPROM space).
This data is first preceded with a Burst Sequence Valid Flag (EEPROM byte 12). If this byte has a
value of A5h, the data that follows is recognized as a sequence of bursts. Otherwise, the EEPROM
Port x PHY Basic Control Register (PHY_BASIC_CONTROL_x)
Virtual PHY Auto-Negotiation Advertisement Register (VPHY_AN_ADV)
Virtual PHY Special Control/Status Register (VPHY_SPECIAL_CONTROL_STATUS)
Virtual PHY Basic Control Register (VPHY_BASIC_CTRL)
206. Additionally, the
Section 13.2.6.1, "Virtual PHY Basic Control Register (VPHY_BASIC_CTRL)," on page
Section 13.3.2.1, "Port x PHY Basic Control Register (PHY_BASIC_CONTROL_x)," on
Restart Auto-Negotiation (PHY_RST_AN)
Port 2 Manual Flow Control Register
are written when the EEPROM Loader is run.
LED Configuration Register
Section 13.2.6.5, "Virtual PHY Auto-Negotiation Advertisement Register
Restart Auto-Negotiation (PHY_RST_AN)
register to determine the new Auto-negotiation results.
186.
DATASHEET
are based on configuration straps, the EEPROM Loader reloads
(VPHY_AN_ADV),
Section 13.2.6.8, "Virtual PHY Special Control/Status Register
200.
123
register to determine the new Auto-negotiation results.
Section 13.2.7.7, "Port 1 MII Basic Control Register
, a n d
192.
(LED_CFG),
Virtual PHY Auto-Negotiation Advertisement
V i r t u a l P H Y B a s i c C o n t r o l R e g i s t e r
Virtual PHY Special Control/Status Register
(MANUAL_FC_2), and
bit is set in this register. This re-runs the
Port 1 Manual Flow Control Register
is written with the new defaults as
bit is set in these registers. This
is written with the new defaults
Port x PHY Auto-Negotiation
is written with the new
Revision 1.3 (08-27-09)
Port 0 Manual Flow
Virtual PHY Auto-
is written
180.