Advantech PPC-102, Manual

Page: 49 / 126

Chapter 3 The Engine of the PPC-102: the PCM-5865 35
3.2 CPU Installation and Upgrading
You can upgrade to a higher power Pentium
®
processor at any time.
Simply remove the old CPU, install the new one, and set the jumpers for
the new CPU type and speed.
3.2.1 System clock setting (J4 and J15)
J4 and J15 are used to set the CPU and PCI bus speed to optimize the
system performance. The system chipset will sense the J15 setting to get
the bus frequency, then adjust its internal timing. J4 is used to set the
CPU and PCI clock. J10 is the P55C or P54C selection. Refer to the CPU
speed reference table (below) for instructions on adjusting the internal
clocks according to the base CPU speed.
Table 3-3: PCM-5865 CPU speed reference table
CPU Speed (MHz) 75 100 133 150 *166 200
Clock setting 50 66 66 60 66 66
Frequency ratio 1.5 1.5 2 2.5 2.5 3
* default setting
Table 3-4: PCM-5865 system/PCI clock setting
System 50MHz 60MHz *66MHz 75MHz
PCI 33.3MHz 30MHz *33.3MHz 32MHz
1 3 5 1 3 5 1 3 5 1 3 5
J15
2 4 6 2 4 6 2 4 6 2 4 6
1 3 5 1 3 5 1 3 5 1 3 5
J4
2 4 6 2 4 6 2 4 6 2 4 6