LAN9303MI-AKZE Datasheet, PDF (54/386 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
Datasheet
Table 4.2 Soft-Strap Configuration Strap Definitions (continued)
STRAP NAME
speed_strap_1
duplex_strap_1
duplex_pol_strap_1
BP_EN_strap_1
DESCRIPTION
PIN / DEFAULT
VALUE
Port 1 Speed Select Strap: This strap configures the
1b
default value of the Speed Select LSB bit of the Port 1 MII
Basic Control Register (P1_MII_BASIC_CONTROL).
This strap may affect the default value of the following
register bits (x=1):
„ Speed Select LSB (PHY_SPEED_SEL_LSB) bit of the
Port x PHY Basic Control Register
(PHY_BASIC_CONTROL_x)
„ PHY Mode (MODE[2:0]) bits of the Port x PHY Special
Modes Register (PHY_SPECIAL_MODES_x)
„ 10BASE-T Full Duplex and 10BASE-T Half Duplex bits of
the Port x PHY Auto-Negotiation Advertisement Register
(PHY_AN_ADV_x)
Refer to the respective register definition sections for
additional information.
Port 1 Duplex Select Strap: This strap affects the default
value of the following register bits (x=1):
„ Duplex Mode (PHY_DUPLEX) bit of the Port x PHY Basic
Control Register (PHY_BASIC_CONTROL_x)
„ PHY Mode (MODE[2:0]) bits of the Port x PHY Special
Modes Register (PHY_SPECIAL_MODES_x)
„ 10BASE-T Full Duplex bit of the Port x PHY Auto-
Negotiation Advertisement Register (PHY_AN_ADV_x)
1b when in internal
PHY mode
(P1_MODE[2:0] =
111b)
Refer to the respective register definition sections for
additional information.
This strap affects the default value of the Duplex Mode bit
of the Port 1 MII Basic Control Register
(P1_MII_BASIC_CONTROL). It also determines the polarity
of the P1_DUPLEX pin in MII MAC mode.
Port 1 Backpressure Enable Strap: Configures the
default value for the Port 1 Backpressure Enable
(BP_EN_1) bit of the Port 1 Manual Flow Control Register
(MANUAL_FC_1).
else
DUPLEX_POL_1
when in MII PHY,
RMII PHY, or MII
MAC mode
1b
Revision 1.5 (07-08-11)
54
DATASHEET
SMSC LAN9303M/LAN9303Mi