About: http://webisa.webdatacommons.org/150569312

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	If you decide to use a frequency source other than a crystal oscillator, such as a TTL oscillator, it will be connected to XTAL1; XTAL2 is left unconnected, as shown in Figure 8-2 (b).
http://www.w3.org/ns/prov#wasQuotedFrom	what-when-how.com