DTK PAM-0057I, User Manual

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Chapter 2
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2.5 CPU TO BUS FREQUENCY RATIO (JP12)
JP12 set the frequency ration between the Internal frequency of the CPU and the
External frequency (called the Bus clock) within the CPU. These must be set
together with the below jumpers CPU External (Bus) Frequency Selection.
2.6 CPU EXTERNAL (BUS) FREQUENCY
SELECTION (JP9, JP10, JP13)
JP9, JP10, JP13 tell the clock generator what frequency to send to the CPU. The Bus
clock times the Bus Ratio equals the CPU’s Internal frequency.
2.7 CPU SPEED
CPU Type Freq. Ratio Bus Ratio Setting
Bus Freq. Setting
(JP12)
Freq. JP9 JP10 JP13 1-2 3-4
Pentium 90MHz 1.5x 60MHz 1-2 1-2 1-2 close open
Pentium 100MHz 1.5x 66MHz 1-2 1-2 1-2 open open
Pentium 120MHz 2.0x 60MHz 2-3 1-2 1-2 close open
Pentium 133MHz 2.0x 66MHz 2-3 1-2 1-2 open open
Pentium 150MHz 2.5x 60MHz 2-3 2-3 1-2 close open
Pentium 166MHz 2.5x 66MHz 2-3 2-3 1-2 open open
Pentium 200MHz 3.0x 66MHz 1-2 2-3 1-2 open open
Pentium w/MMX 166MHz 2.5x 66MHz 2-3 2-3 1-2 open open
Pentium w/MMX 200MHz 3.0x 66MHz 1-2 2-3 1-2 open open
Pentium w/MMX 233MHz 3.5x 66MHz 1-2 1-2 1-2 open open
AMD-K5-PR166 166MHz 2.5x 66MHz 2-3 2-3 1-2 open open
AMD-K5-PR133 133MHz 2.0x 66MHz 2-3 1-2 1-2 open open
AMD-K5-PR120 120MHz 2.0x 60MHz 2-3 1-2 1-2 close open
AMD-K6/300 300MHz 4.5x 66MHz 2-3 2-3 2-3 open open
AMD-K6/266 266MHz 4.0x 66MHz 2-3 1-2 1-2 open open
AMD-K6-2/266 266MHz 4.0x 66MHz 2-3 1-2 2-3 open open
AMD-K6/233 233MHz 3.5x 66MHz 1-2 1-2 1-2 open open
AMD-K6/200 200MHz 3.0x 66MHz 1-2 2-3 1-2 open open
To be continued…
Table 1a