LAN9116_08 Datasheet, PDF (20/132 Pages) SMSC Corporation – Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller
Table 2.5 System and Power Signals (continued)
Datasheet
PIN
NO.
3,65
1,66
7
4
8
11
NAME
SYMBOL
BUFFER NUM
TYPE
PINS
DESCRIPTION
Core Voltage
VDD_CORE
P
Decoupling
2
1.8 V from internal core regulator.
Both pins must be connected
together externally and then tied to a
10uF 0.1-Ohm ESR capacitor, in
parallel with a 0.01uF capacitor to
Ground next to each pin. These pins
must not be used to supply power to
other external devices. See Note 2.1
Core Ground
GND_CORE
P
2
Ground for internal digital logic
PLL Power
VDD_PLL
P
1
1.8V Power from the internal PLL
regulator. This external pin must be
connected to a 10uF 0.1-Ohm ESR
capacitor, in parallel with a 0.01uF
capacitor to Ground. This pin must
not be used to supply power to other
external devices. See Note 2.1
PLL Ground
VSS_PLL
P
1
GND for the PLL
Reference Power
VDD_REF
P
1
Connected to 3.3v power and used
as the reference voltage for the
internal PLL
Reference Ground
VSS_REF
P
1
Ground for internal PLL reference
voltage
Note 2.1
Please refer to the SMSC application note AN 12.5 titled “Designing with the LAN9118 -
Getting Started”. It is also important to note that this application note applies to the whole
SMSC LAN9118 family of Ethernet controllers. However, subtle differences may apply.
Revision 1.5 (07-11-08)
20
DATASHEET
SMSC LAN9116