lan9312 Standard Microsystems Corp., lan9312 Datasheet - Page 30
lan9312
Manufacturer Part Number
lan9312
Description
Lan9312 High Performance Two Port 10/100 Managed Ethernet Switch With 32-bit Non-pci Cpu Interface
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9312.pdf
(458 pages)
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Revision 1.2 (04-08-08)
15-17,19,
20,22-26,
122,125
28-32,
34-38,
49-53,
45,47,
41-44
8-12,
PIN
120
121
PIN
4-6,
118
55
57
58
59
Analog Power
+3.3V Master
+3.3V Port 2
+1.8V Power
+1.8V Power
Read Strobe
Write Strobe
Bias Power
Chip Select
Transmitter
Transmitter
Host Bus
Host Bus
Address
Supply
Supply
Supply
Supply
NAME
NAME
Port 2
Port 1
Data
Table 3.3 LAN Port 1 & 2 Power and Common Pins (continued)
VDD33BIAS
VDD18TX2
VDD18TX1
VDD33A2
SYMBOL
SYMBOL
D[31:0]
A[9:2]
nWR
nRD
nCS
Table 3.4 Host Bus Interface Pins
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
DATASHEET
BUFFER
BUFFER
TYPE
TYPE
IS/O8
IS
IS
IS
IS
P
P
P
P
30
+3.3V Port 2 Analog Power Supply
Refer to the LAN9312 application note for
additional connection information.
+3.3V Master Bias Power Supply
Refer to the LAN9312 application note for
additional connection information.
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.
+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.
Host Bus Data High: Bits 31-0 of the Host Bus 32-
bit data port.
Note:
Host Bus Address: 9-bit Host Bus Address Port
used to select Internal CSR’s and TX and RX
FIFO’s.
Note:
Read Strobe: Active low strobe to indicate a read
cycle. This signal is qualified by the nCS chip
select.
Write Strobe: Active low strobe to indicate a write
cycle. This signal is qualified by the nCS chip
select.
Chip Select: Active low signal used to qualify read
and write operations.
Big and little endianess is supported.
The A0 and A1 bits are not used because
the LAN9312 must be accessed on
DWORD boundaries.
DESCRIPTION
DESCRIPTION
SMSC LAN9312
Datasheet
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