LAN9116 Datasheet, PDF (13/109 Pages) SMSC Corporation – Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

LAN9116
TABLE 2-5: SYSTEM AND POWER SIGNALS (CONTINUED)
Pin No.
Name
Symbol
Buffer
Type
# Pins
Description
1,66
Core Ground
GND_CORE
P
7
PLL Power
VDD_PLL
P
4
PLL Ground
VSS_PLL
P
2
Ground for internal digital logic
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
1 GND for the PLL
8
Reference Power
VDD_REF
P
1 Connected to 3.3v power and used as
the reference voltage for the internal
PLL
11 Reference Ground
VSS_REF
P
1
Ground for internal PLL reference
voltage
Note 2-1
Please refer to the Microchip 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 Microchip LAN9118
family of Ethernet controllers. However, subtle differences may apply.
2.1 Buffer Types
TABLE 2-6:
Type
I
IS
O12
OD12
IO8
OD8
O8
PU
PD
AI
AO
AIO
ICLK
OCLK
BUFFER TYPES
Input pin
Description
Schmitt triggered Input
Output with 12mA sink and 12mA source
Open-drain output with 12mA sink
I/O with 8mA symmetrical drive
Open-drain output with 8mA sink
Output 8mA symmetrical drive
50uA (typical) internal pull-up
50uA (typical) internal pull-down
Analog input
Analog output
Analog bi-directional
Crystal oscillator input pin
Crystal oscillator output pin
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DS00002268A-page 13