Small Footprint MII/RMII 10/100 Ethernet Transceiver for Automotive Applications
Datasheet
Table 2.1 MII/RMII Signals (continued)
BUFFER
NUM PINS
NAME
SYMBOL
TYPE
DESCRIPTION
Collision
Detect
COL
VO8
This signal is asserted to indicate detection of a
collision condition in MII mode.
(MII Mode)
Carrier Sense
/ Receive
Data Valid
CRS_DV
MODE2
CRS
VO8
This signal is asserted to indicate the receive
medium is non-idle in RMII mode. When a
10BASE-T packet is received, CRS_DV is
asserted, but RXD[1:0] is held low until the SFD
byte (10101011) is received.
(RMII Mode)
Note:
Per the RMII standard, transmitted data
is not looped back onto the receive data
pins in 10BASE-T half-duplex mode.
1
PHY
Operating
Mode 2
VIS
(PU)
Combined with MODE0 and MODE1, this
configuration strap sets the default PHY mode.
See Note 2.1 for more information on
configuration straps.
Configuration
Strap
Note:
Refer to Section 3.7.2, "MODE[2:0]:
Mode Configuration," on page 38 for
additional details.
Carrier Sense
(MII Mode)
VO8
(PD)
This signal indicates detection of a carrier in MII
mode.
1
Note 2.1 Configuration strap values are latched on power-on reset and system reset. Configuration
straps are identified by an underlined symbol name. Signals that function as configuration
straps must be augmented with an external resistor when connected to a load. Refer to
Section 3.7, "Configuration Straps," on page 37 for additional information.
SMSC LAN88710AM/LAN88710BM
13
Revision 1.1 (05-26-10)
DATASHEET
SMSC [ SMSC CORPORATION ]
