LAN9215_12 Datasheet, PDF (17/144 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
2.1
Pin List
NAME
Host Data
Host Address
Read Strobe
Write Strobe
SYMBOL
D[15:0]
A[7:1]
nRD
nWR
Chip Select
nCS
Interrupt
Request
FIFO Select
IRQ
FIFO_SEL
Table 2.1 Host Bus Interface Signals
BUFFER
#
TYPE PINS
DESCRIPTION
I/O8
16 Bi-directional data port.
IS
7 7-bit Address Port. Used to select Internal CSR’s and
TX and RX FIFOs.
IS
1 Active low strobe to indicate a read cycle.
IS
1 Active low strobe to indicate a write cycle. This signal,
qualified with nCS, is also used to wakeup the
LAN9215 when it is in a reduced power state.
IS
1 Active low signal used to qualify read and write
operations. This signal qualified with nWR is also used
to wakeup the LAN9215 when it is in a reduced power
state.
O8/OD8
1 Programmable Interrupt request. Programmable
polarity, source and buffer types.
IS
1 When driven high all accesses to the LAN9215 are to
the RX or TX Data FIFOs. In this mode, the A[7:3]
upper address inputs are ignored.
SPEED_SEL
0
1
SPEED
10Mbps
100Mbps
Table 2.2 Default Ethernet Settings
DEFAULT ETHERNET SETTINGS
DUPLEX
Half-Duplex
Half-Duplex
AUTO NEG.
Disabled
Enabled
NAME
TPO+
TPO-
TPI+
TPI-
PHY External Bias
Resistor
SYMBOL
TPO+
TPO-
TPI+
TPI-
EXRES1
Table 2.3 LAN Interface Signals
BUFFER
TYPE
AO
AO
AI
AI
AI
NUM
PINS
1
1
1
1
1
DESCRIPTION
Transmit Positive Output (normal)
Receive Positive Input (reversed)
Transmit Negative Output (normal)
Receive Negative Input (reversed)
Receive Positive Input (normal)
Transmit Positive Input (reversed)
Receive Negative Input (normal)
Transmit Negative Output (reversed)
Must be connected to ground through a 12.4K
ohm 1% resistor.
SMSC LAN9215
17
DATASHEET
Revision 2.9 (03-01-12)