LAN9312 Datasheet, PDF (30/458 Pages) SMSC Corporation – High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

PIN
122,125
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Table 3.3 LAN Port 1 & 2 Power and Common Pins (continued)
NAME
+3.3V Port 2
Analog Power
Supply
SYMBOL
VDD33A2
BUFFER
TYPE
DESCRIPTION
P
+3.3V Port 2 Analog Power Supply
Refer to the LAN9312 application note for
additional connection information.
+3.3V Master VDD33BIAS
Bias Power
120
Supply
P
+3.3V Master Bias Power Supply
Refer to the LAN9312 application note for
additional connection information.
Port 2
VDD18TX2
Transmitter
+1.8V Power
121
Supply
P
Port 2 Transmitter +1.8V Power Supply: This pin
is supplied from the internal PHY voltage regulator.
This pin must be tied to the VDD18TX1 pin for
proper operation.
Refer to the LAN9312 application note for
additional connection information.
Port 1
VDD18TX1
Transmitter
118
+1.8V Power
Supply
P
+1.8V Port 1 Transmitter Power Supply: This pin
must be connected directly to the VDD18TX2 pin
for proper operation.
Refer to the LAN9312 application note for
additional connection information.
PIN
4-6,
8-12,
15-17,19,
20,22-26,
28-32,
34-38,
41-44
45,47,
49-53,
55
NAME
Host Bus
Data
Host Bus
Address
Read Strobe
57
Write Strobe
58
59
Chip Select
Table 3.4 Host Bus Interface Pins
SYMBOL
D[31:0]
BUFFER
TYPE
DESCRIPTION
IS/O8
Host Bus Data High: Bits 31-0 of the Host Bus 32-
bit data port.
Note: Big and little endianess is supported.
A[9:2]
nRD
nWR
nCS
IS
Host Bus Address: 9-bit Host Bus Address Port
used to select Internal CSR’s and TX and RX
FIFO’s.
Note:
The A0 and A1 bits are not used because
the LAN9312 must be accessed on
DWORD boundaries.
IS
Read Strobe: Active low strobe to indicate a read
cycle. This signal is qualified by the nCS chip
select.
IS
Write Strobe: Active low strobe to indicate a write
cycle. This signal is qualified by the nCS chip
select.
IS
Chip Select: Active low signal used to qualify read
and write operations.
Revision 1.2 (04-08-08)
30
DATASHEET
SMSC LAN9312