lan9312 Standard Microsystems Corp., lan9312 Datasheet - Page 34

• 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.

Revision 1.2 (04-08-08)
7,13,21,27,
3,14,40,65,
87,93,100
74,88,104
33,39,46,
54,64,66,
72,73,81,
PIN
108
PIN
107
105
106
PIN
75
62
Note 3.7
Power Supply
Management
+1.8V Power
Crystal Input
Digital Core
PLL +1.8V
+3.3V I/O
Crystal
Output
Supply
Output
NAME
Power
NAME
NAME
Power
Test 1
Test 2
Event
The input buffers are enabled when configured as GPIO inputs only.
Table 3.9 Core and I/O Power and Ground Pins
VDD18CORE
VDD18PLL
Table 3.7 Miscellaneous Pins (continued)
SYMBOL
SYMBOL
SYMBOL
VDD33IO
TEST1
TEST2
PME
XO
XI
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Table 3.8 PLL Pins
DATASHEET
BUFFER
BUFFER
BUFFER
O8/OD8
OCLK
TYPE
TYPE
TYPE
ICLK
AI
AI
P
P
P
34
Test 1: This pin must be tied to VDD33IO for
proper operation.
Test 2: This pin must be tied to VDD33IO for
proper operation.
Power Management Event: When programmed
accordingly, this signal is asserted upon detection
of a wakeup event. The polarity and buffer type of
this signal is programmable via the PME_EN bit of
the
(PMT_CTRL).
Refer to
Management," on page 36
information on the LAN9312 power management
features.
PLL +1.8V Power Supply: This pin must be
connected to VDD18CORE for proper operation.
Refer to the LAN9312 application note for
additional connection information.
Crystal Input: External 25MHz crystal input. This
signal can also be driven by a single-ended clock
oscillator. When this method is used, XO should be
left unconnected.
Crystal Output: External 25MHz crystal output.
+3.3V Power Supply for I/O Pins and Internal
Regulator
Refer to the LAN9312 application note for
additional connection information.
Digital Core +1.8V Power Supply Output: +1.8V
power from the internal core voltage regulator. All
VDD18CORE pins must be tied together for proper
operation.
Refer to the LAN9312 application note for
additional connection information.
Power Management Control Register
Chapter 4, "Clocking, Resets, and Power
DESCRIPTION
DESCRIPTION
DESCRIPTION
for additional
SMSC LAN9312
Datasheet