AMD AMD-K6-2/400 User Guide - Page 128
D/C# (Data/Code
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Preliminary Information AMD-K6™-2E+ Embedded Processor Data Sheet 23542A/0-September 2000 5.17 D/C# (Data/Code) Pin Attribute Summary Output The processor drives D/C # during a memory bus cycle to indicate whether it is addressing data or executable code. D/C# is also used to define other bus cycles, including interrupt acknowledge and special cycles. See Table 23 and Table 24 on page 142 for more details. Driven and Floated D/C# is driven off the same clock edge as ADS# and remains in the same state until the clock edge on which NA # or the last expected BRDY # of the cycle is sampled asserted. D/C # is driven during memory cycles, I/O cycles, special bus cycles, and interrupt acknowledge cycles. D/C # is floated off the clock edge that BOFF # is sampled asserted and off the clock edge that the processor asserts HLDA in recognition of HOLD. 106 Signal Descriptions Chapter 5