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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DP83266 датащи(PDF) 36 Page - National Semiconductor (TI) |
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DP83266 датащи(HTML) 36 Page - National Semiconductor (TI) |
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36 / 152 page  60 Functional Description (Service Engine) (Continued) Single Read Tbr MACSI device asserts AB BR to indicate it wishes to perform a transfer Host asserts AB BG The MACSI de- vice moves to Tpa within the next three clocks Tpa MACSI device drives AB A and AB AD with the ad- dress asserts AB AS drives AB RW and AB SIZ 20 and negates AB BR if another transaction is not required Td MACSI device negates AB AS asserts AB DEN and samples AB ACK and AB ERR Slave asserts AB ACK drives AB ERR drives AB AD (with data) when ready The MACSI device samples a valid AB ACK capturing the read data Tw states may occur after Td Tr MACSI device negates AB RW AB DEN and AB SIZ 20 and releases AB A and AB AS Slave deasserts AB ACK and AB ERR and releases AB AD Single Write Tbr MACSI device asserts AB BR to indicate it wishes to perform a transfer Host asserts AB BG The MACSI de- vice moves to Tpa within the next three clocks Tpa MACSI device drives AB A and AB AD with the ad- dress asserts AB AS drives AB RW and AB SIZ 20 and negates AB BR if another transaction is not required Td MACSI device negates AB AS asserts AB DEN drives AB AD with the write data and starts sampling AB ACK and AB ERR Slave captures AB AD data as- serts AB ACK and drives AB ERR Tw states may occur after Td if the slave deasserts AB ACK Tr MACSI device negates AB RW AB DEN and AB SIZ 20 and releases AB A AB AD and AB AS Slave deasserts AB ACK and AB ERR and stops driving AB AD with data TLF11705 – 10 FIGURE 6-5 ABus Single Write Physical Addressing0 ws 1 ws 36 |
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