Specifications

CompuLab Ltd. IPC2 – Hardware Specification Page 25 of 83
3.5 System Clocks
The PCH provides a complete system clocking solution through Integrated Clocking. PCH based
platforms require several single-ended and differential clocks to synchronize signal operation and
data propagation system-wide between interfaces and across clock domains. In Integrated Clock
mode, all the system clocks will be provided by PCH from a 24 MHz crystal generated clock input.
The output signals from PCH are:
 6x 100 MHz differential sources for PCI Express* 2.0 devices
 1x 100 MHz differential clock for XDP/ITP
 2x 24 MHz single-ended sources for other LPC devices
Table 13 – PCH Clock Input
Table 14 – PCH Clock Outputs