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AMD-K6 Datasheet(PDF) 104 Page - Advanced Micro Devices |
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AMD-K6 Datasheet(HTML) 104 Page - Advanced Micro Devices |
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104 / 346 page ![]() 86 Signal Descriptions Chapter 5 AMD-K6® Processor Data Sheet 20695H/0—March 1998 Preliminary Information 5.9 BF[2:0] (Bus Frequency) Inputs, Internal Pullups Summary BF[2:0] determine the internal operating frequency of the processor. The frequency of the CLK input signal is multiplied internally by a ratio determined by the state of these signals as defined in Table 13. BF[2:0] have weak internal pullups and default to the 3.5 multiplier if left unconnected. Sampled BF[2:0] are sampled during the falling transition of RESET. They must meet a minimum setup time of 1.0 ms and a minimum hold time of two clocks relative to the negation of RESET. Table 13. Processor-to-Bus Clock Ratios State of BF[2:0] Inputs Processor-Clock to Bus-Clock Ratio 100b 2.5x 101b 3.0x 110b 2.0x 111b 3.5x 000b 4.5x 001b 5.0x 010b 4.0x 011b 5.5x |
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