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DS1994 Datasheet(PDF) 11 Page - Dallas Semiconductor |
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DS1994 Datasheet(HTML) 11 Page - Dallas Semiconductor |
11 / 22 page DS1994 11 of 22 Figure 6. MEMORY FUNCTIONS FLOWCHART (continued) Y N Bus Master TX TA1 (T7:T0) Bus Master TX TA2 (T15:T8) Scratchpad 55H Copy ? N Y From Figure 6 First Part Bus Master TX E/S Byte DS1994 Copies Scratchpad Data To Memory Auth. Code Match ? DS1994 TX "1"s DS1994 TX "0"s AA = 1 F0H Read Memory ? N To Figure 6 First Part Y N Bus Master TX Reset ? Bus Master TX Reset ? Y N Y Y Bus Master TX TA1 (T7:T0) Bus Master TX TA2 (T15:T8) DS1994 sets Memory Address = (T15:T0) N Y N Master RX Data Byte From Memory Address Bus Master TX Reset ? Memory DS1994 Address Counter Increments Bus Master RX "1"s Address = 21Dh ? |
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