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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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S29CD032G датащи(PDF) 67 Page - SPANSION |
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S29CD032G датащи(HTML) 67 Page - SPANSION |
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67 / 93 page  March 22, 2004 30606B0 S29CD032G 67 Ad va nc e In forma t i o n The remaining scenario is that the system initially determines that the toggle bit is toggling and DQ5 has not gone high. The system may continue to monitor the toggle bit and DQ5 through successive read cycles, determining the status as de- scribed in the previous paragraph. Alternatively, it may choose to perform other system tasks. In this case, the system must start at the beginning of the algo- rithm when it returns to determine the status of the operation (top of Figure 7). START No Yes Yes DQ5 = 1? No Yes DQ6 = Toggle? No Read Byte (DQ0-DQ7) Address = VA DQ6 = Toggle? Read Byte Twice (DQ 0-DQ7) Adrdess = VA Read Byte (DQ0-DQ7) Address = VA FAIL PASS Notes: 1. Read toggle bit with two immediately consecutive reads to determine whether or not it is toggling. See text. 2. Recheck toggle bit because it may stop toggling as DQ5 changes to “1”. See text. Figure 7. Toggle Bit Algorithm (Note 1) (Notes 1, 2) |
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