Advantech PCM-5864, User Manual

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Chapter 2 Installation 17
When you install a new CPU, be sure to adjust the board settings,
such as CPU type and CPU clock. Improper settings may
damage the CPU.
2.6.2 System clock setting (J5, J9, and J10)
J5, J9 and J10 are used to set the CPU and PCI bus speed to
optimize the system performance. The system chipset will sense
the J10 setting to get the bus frequency, then adjust its internal
timing. J9 is used to set the CPU and PCI clock. J5 is the CPU
clock ratio setting jumper. Refer to the CPU Speed Reference
Table (below) for instructions on adjusting the internal clocks
according to the base CPU speed.
Table 2-3: CPU speed references
CPU Speed (MHz) 75 100 *133 150 166 200 233 266 300 333
Clock setting 50 66 66 60 66 66 66 66 66 66
Frequency ratio 1.5 1.5 2 2.5 2.5 3 3.5 4 4.5 5
* default setting
Table 2-4: Sys tem/PCI clock setting (J9)
System 50 MHz 60 MHZ *66 MHz 75 MHz
PCI 25 MHz 30 MHz *33.3 MHz 37.5 MHz
* default setting
2 4 6
1 3 5
2 4 6 2 4 6 2 4 6
1 3 5 1 3 5 1 3 5