Instruction manual
20 PCM-7890 User Manual
CPU frequency ratio (J3)
CPU core frequency = CPU frequency ratio (3~5.5) * External
bus clock (66 or 100 MHz)
CPU frequency ratio (J3)
3x 3.5x 4x
4.5x 5x 5.5x
*default
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
System temperature thermal sensor
(J1)
This jumper is reserved to connect a system temperature thermal
sensor in order to detect the system temperature.