COM20020-5 Datasheet, PDF (6/58 Pages) SMSC Corporation – Universal Local Area Network Controller with 2K x 8 On-Board RAM

13,14
24
12
16,17
15,28
7,14,22
Crystal
Oscillator
Power
Supply
Ground
MISCELLANEOUS
XTAL1,
XTAL2
An external crystal should be connected to
these pins. If an external TTL clock is used
instead, it must be connected to XTAL1 with
a 390Ω pull-up resistor, and XTAL2 should
be left floating.
VDD
+5 Volt Power Supply pin.
VSS
Ground pin.
6