Clock distribution/synchronisation

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by wlamers on Fri May 24 02:14:01 MST 2013


<p class="MsoNormal">My current design requires to have the main clock of two LPC4357's to be synchronized. Additionally I require the clock to be routed to another external PCB over some longer distance (12 MHz clock). Distributing the clock can be done using a crystal and clock buffer (like the TI LMK00105). But the voltage input requirement of XTAL1 is &lt;= 1.2V according to the datasheet of the LPC43xx. Maybe I can use the GP_CLKIN pin for the input to solve the voltage requirement. Who knows the best way to clock both uC's with the same clock source? Maybe there are other alternatives than using a clock buffer?