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APPENDIX

10.1.47 SELFSB0 (I) SELFSB1 (O)

The Pentium® III Xeon™ processor at 700 MHz and 900 MHz adds a definition to the SELFSB [1:0] pins which is

compatible with legacy systems as well as new platforms. The added functionality provides the means for the clock

synthesizer and additional baseboard logic to auto detect the expected system bus frequency required by a specific

cartridge. Table 59 and Figure 43 provide a summary of the functionality and the resistor values for an frequency auto

detect circuit.

1 2 ... 95 96 97 98 99 100 101 102 103 104 105

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