LAN9215_12 Datasheet, PDF (21/144 Pages) SMSC Corporation – 16-bit Non-PCI 10/100 Ethernet Controller with HP Auto-MDIX Support

16-bit Non-PCI 10/100 Ethernet Controller with HP Auto-MDIX Support
Datasheet
Table 2.5 System and Power Signals (continued)
NAME
SYMBOL
BUFFER
TYPE
NUM
PINS
DESCRIPTION
PLL Power
VDD_PLL
PLL Ground
Reference Power
Reference Ground
Ground
VSS_PLL
VDD_REF
VSS_REF
GND
P
1
+1.8V Power from the internal PLL regulator.
This pin must be connected to a 10uF capacitor
(<2 Ohm ESR), in parallel with a 0.01uF
capacitor to ground. This pin must not be used
to supply power to other external devices. See
Note 2.1.
P
1
GND for the PLL
(100-TQFP Package Only)
P
1
Connected to 3.3v power and used as the
reference voltage for the internal PLL
P
1
Ground for internal PLL reference voltage
(100-TQFP Package Only)
P
12
Common Ground
(100-LFBGA Package Only)
Note 2.1 Please refer to the SMSC application note ”AN14.9 - “Migrating from LAN9115 to the
LAN9215” for additional details.
NAME
Transmit Clock:
Transmit Data [3:0]
Transmit Enable
Receive Clock
Receive Error
Collision Detect:
Receive Data[3:0]
Carrier Sense
Receive Data
Valid:
SMSC LAN9215
SYMBOL
TX_CLK
TXD[3:0]
TX_EN
RX_CLK
RX_ER
COL
RXD[3:0]
CRS
RX_DV
Table 2.6 MII Interface Signals
BUFFER
TYPE
I
(PD)
O8
(PD)
O8
(PD)
I
(PD)
I
(PD)
I
(PD)
I
Note 2.2
I
(PD)
I
(PD)
NUM
PINS
1
4
1
1
1
1
1
1
1
DESCRIPTION
Transmit Clock: 25MHz in 100Base-TX mode.
2.5MHz in 10Base-T mode.
Transmit Data 3-0: Data bits that are accepted
by the PHY for transmission.
When the internal PHY is selected, these
signals are driven low (0).
Transmit Enable: Indicates that valid data is
presented on the TXD[3:0] signals, for
transmission.
When the internal PHY is selected, this signal
is driven low (0).
Receive Clock: 25MHz in 100Base-TX mode.
2.5MHz in 10Base-T mode.
Receive Error: Asserted by the PHY to indicate
that an error was detected somewhere in the
frame presently being transferred from the PHY.
MII Collision Detect: Asserted by the PHY to
indicate detection of collision condition.
Receive Data 3-0: Data bits that are sent from
the PHY to the Ethernet MAC. See Note 2.2.
Carrier Sense: Indicates detection of carrier.
Receive Data Valid: Indicates that recovered
and decoded data nibbles are being presented
by the PHY on RXD[3:0].
21
DATASHEET
Revision 2.9 (03-01-12)