LAN9217 Datasheet, PDF (15/134 Pages) SMSC Corporation – 16-bit High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX

16-bit High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX
Datasheet
PIN NO.
43-46,49-
53,56-59,62-
64
12-18
NAME
Host Data
Host Address
92
Read Strobe
93
Write Strobe
94
Chip Select
72
71,84,90,91
73
74
Interrupt
Request
Reserved
AutoMDIX
Enable
10/100
Selector
76
FIFO Select
Table 2.1 Host Bus Interface Signals
SYMBOL
D[15:0]
BUFFER
#
TYPE PINS
DESCRIPTION
I/O8
16 Bi-directional data port. Supports
Big/Little Endian Byte ordering.
A[7:1]
IS
nRD
IS
nWR
IS
nCS
IS
IRQ
O8/OD8
Reserved
AMDIX_EN
I (PD)
SPEED_SEL I (PU)
FIFO_SEL
IS
7 7-bit Address Port. Used to select
Internal CSR’s and TX and RX FIFOs.
1 Active low strobe to indicate a read
cycle.
1 Active low strobe to indicate a write
cycle. This signal, qualified with nCS, is
also used to wakeup the LAN9217
when it is in a reduced power state.
1 Active low signal used to qualify read
and write operations. This signal
qualified with nWR is also used to
wakeup the LAN9217 when it is in a
reduced power state.
1 Programmable Interrupt request.
Programmable polarity, source and
buffer types.
4 No Connect
1 Enables Auto-MDIX. Pull high to
enable Auto-MDIX, pull low or leave
unconnected to disable Auto-MDIX.
1 This signal functions as a configuration
input on power-up and is used to select
the default Ethernet settings. Upon
deassertion of reset, the value of the
input is latched. This signal functions
as shown in Table 2.2, "Default
Ethernet Settings", below.
1 When driven high all accesses to the
LAN9217 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
SMSC LAN9217
15
DATASHEET
Revision 1.5 (07-18-06)