AMD AMD-K6-2/400 User Guide - Page 115
Signal Descriptions, 5.1 Signal Terminology
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23542A/0-September 2000 Preliminary Information AMD-K6™-2E+ Embedded Processor Data Sheet 5 Signal Descriptions This chapter includes a detailed description of each signal supported on the AMD-K6-2E+ processor. This chapter also provides tables listing the signals grouped by type, beginning on page 140. The logic symbol diagram on page 91 shows the signals grouped by function. Connection diagrams and pins listed by high-level function are included in Chapter 18, "Pin Designations" on page 321. 5.1 Signal Terminology The following terminology is used in this chapter: s Driven-The processor actively pulls the signal up to the High-voltage state or pulls the signal down to the Low-voltage state. s Floated-The signal is not being driven by the processor (high-impedance state), which allows another device to drive this signal. s Asserted-For all active High signals, the term asserted means the signal is in the High-voltage state. For all active Low signals, the term asserted means the signal is in the Low-voltage state. See Table 19 on page 140 for information on asserting signals synchronously and asynchronously. s Negated-For all active High signals, the term negated means the signal is in the Low-voltage state. For all active Low signals, the term negated means the signal is in the High-voltage state. s Sampled-The processor has measured the state of a signal at predefined points in time and will take the appropriate action based on the state of the signal. If a signal is not sampled by the processor, its assertion or negation has no effect on the operation of the processor. Chapter 5 Signal Descriptions 93