LAN9353 Datasheet, PDF (24/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
TABLE 3-6: SWITCH PORT 0 MII/RMII & CONFIGURATION STRAP PIN DESCRIPTIONS
Num
Pins
Name
Symbol
Port 0 MII/RMII
1
Output Data
Valid
P0_OUTDV
Port 0 MII
Output Data
Error
P0_OUTER
1
Port 0 Speed
P0_SPEED
Buffer
Type
VO8
VO8
VO8
VO8
VO8
Description
MII MAC Mode: This pin is the TX_EN signal to the
external PHY and indicates valid data on
P0_OUTD[3:0].
MII PHY Mode: This pin is the RX_DV signal to the
external MAC. The output driver is disabled when
the Isolate (VPHY_ISO) bit is set in the Port 0 Port x
Virtual PHY Basic Control Register (VPHY_BA-
SIC_CTRL_x).
RMII MAC Mode: This pin is the TX_EN signal to
the external PHY.
RMII PHY Mode: This pin is the CRS_DV signal to
the external MAC. The output driver is disabled
when the Isolate (VPHY_ISO) bit is set in the Port 0
Port x Virtual PHY Basic Control Register
(VPHY_BASIC_CTRL_x).
MII MAC Mode: This pin is the TX_ER signal to the
external PHY and is used to send Lower Power Idle.
VIS
(PU)
RMII MAC Mode: This pin can be changed at any
time (live value) and is typically tied to the speed
indication from the external PHY. It can be overrid-
den by the Speed Select LSB (VPHY_-
SPEED_SEL_LSB) bit in the Port 0 Port x Virtual
PHY Basic Control Register (VPHY_BASIC_C-
TRL_x) by clearing the Auto-Negotiation
(VPHY_AN) bit in the same register.
-
-
1
Port 0 MII/RMII
Duplex
P0_DUPLEX
-
VIS
(PU)
The polarity of this pin is determined by the
speed_pol_strap_0.
MII PHY and RMII PHY Modes: This pin is not
used.
MII MAC and RMII MAC Modes: This pin can be
changed at any time (live value) and is typically tied
to the duplex indication from the external PHY. It can
be overridden by the Duplex Mode (VPHY_DU-
PLEX) bit in the Port 0 Port x Virtual PHY Basic
Control Register (VPHY_BASIC_CTRL_x) by clear-
ing the Auto-Negotiation (VPHY_AN) bit in the same
register.
The polarity of this pin is determined by the duplex-
_pol_strap_0.
-
MII PHY and RMII PHY Modes: This pin is not
used.
DS00001925A-page 24
 2015 Microchip Technology Inc.