LAN9311 Datasheet, PDF (30/461 Pages) SMSC Corporation – Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
PIN
122,125
Table 3.3 LAN Port 1 & 2 Power and Common Pins (continued)
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
+3.3V Port 2
Analog Power
Supply
VDD33A2
P
+3.3V Port 2 Analog Power Supply
Refer to the LAN9311/LAN9311i reference
schematic for additional connection information.
+3.3V Master VDD33BIAS
Bias Power
120
Supply
P
+3.3V Master Bias Power Supply
Refer to the LAN9311/LAN9311i reference
schematic 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 LAN9311/LAN9311i reference
schematic for additional connection information.
Port 1
VDD18TX1
Transmitter
118
+1.8V Power
Supply
P
Port 1 Transmitter +1.8V Power Supply: This pin
must be connected directly to the VDD18TX2 pin
for proper operation.
Refer to the LAN9311/LAN9311i reference
schematic for additional connection information.
PIN
25,26,
28-32,
34-38,
41-44
45,47,
49-53,
55,56
57
58
59
NAME
Host Bus
Data
Host Bus
Address
Read Strobe
Write Strobe
Chip Select
Table 3.4 Host Bus Interface Pins
SYMBOL
BUFFER
TYPE
DESCRIPTION
D[15:0]
IS/O8
Host Bus Data: Bits 15-0 of the Host Bus data
port.
Note: Big and little endianess is supported.
A[9:1]
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 bit is not used because the
LAN9311/LAN9311i must be accessed on
WORD 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 2.0 (02-14-13)
30
DATASHEET
SMSC LAN9311/LAN9311i