LAN9303 Datasheet, PDF (52/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
Table 4.2 Soft-Strap Configuration Strap Definitions (continued)
STRAP NAME
manual_FC_strap_0
SQE_test_disable_strap_0
DESCRIPTION
PIN / DEFAULT
VALUE
Port 0 (External MII) Manual Flow Control Enable Strap: 0b
This strap affects the default value of the following register
bits:
„ Port 0 Full-Duplex Manual Flow Control Select
(MANUAL_FC_0) bit in the Port 0 Manual Flow Control
Register (MANUAL_FC_0)
„ Asymmetric Pause and Symmetric Pause bits of the
Virtual PHY Auto-Negotiation Advertisement Register
(VPHY_AN_ADV)
Refer to the respective register definition sections for
additional information.
Note:
In MAC mode, this strap is not used. In this mode,
the Virtual PHY is not applicable, and full-duplex
flow control must be controlled manually by the
host, based upon the external PHYs Auto-
negotiation results.
SQE Heartbeat Disable Strap: Configures the default
0b
value of the SQEOFF bit of the Virtual PHY Special
Control/Status Register
(VPHY_SPECIAL_CONTROL_STATUS) when in MII PHY
mode. It is not used in RMII PHY or MII MAC modes.
4.2.4.2
Hard-Straps
Hard-straps are latched upon Power-On Reset (POR) or pin reset (nRST) only. Unlike soft-straps,
hard-straps always have an associated pin and cannot be overridden by the EEPROM Loader. These
straps are used as either direct configuration values or as register defaults. Table 4.3 provides a list of
all hard-straps and their associated pins. These straps, along with their pin assignments are also
defined in Chapter 3, "Pin Description and Configuration," on page 23.
Table 4.3 Hard-Strap Configuration Strap Definitions
STRAP NAME
mngt_mode_strap[1:0]
eeprom_size_strap
DESCRIPTION
PIN(S)
Serial Management Mode Strap: Configures the default
serial management mode.
00 = RESERVED
01 = SMI Managed Mode
10 = I²C Managed Mode
11 = RESERVED
Refer to Section 2.3, "Modes of Operation," on page 19 for
additional information on the various modes of the device.
EEPROM Size Strap: Configures the EEPROM size range
as specified in Section 8.3, "I2C Master EEPROM
Controller," on page 107.
MNGT1_LED4P :
MNGT0_LED3P
Note 4.1
E2PSIZE_LED2P
Note 4.1
Revision 1.3 (08-27-09)
52
DATASHEET
SMSC LAN9303/LAN9303i