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TMPR4956C Datasheet(PDF) 213 Page - Toshiba Semiconductor |
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TMPR4956C Datasheet(HTML) 213 Page - Toshiba Semiconductor |
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213 / 286 page  Chapter 11 TX4956 System Interface 11-45 EOK* (I) Indicates an external agent accepts a processor request. A) EOK* is active. B) The processor asserts PValid* and drives a read or write command. EOK* is asserted and the external agent accepts the processor command. Once the external agent has accepted a processor write command, the agent must be able to accept the entire data size at the programmed data rate immediately following this command. The external agent may provide read response data to the processor at any rate. Deasserting EOK* may kill a processor read/write request in progress. If this occurs, the external agent must ignore command and data from the processor in the following cycle. Figure 11.3.8 Sample Cycle with EOK* Asserted Figure 11.3.9 Sample Cycle with EOK* Asserted, Then Deasserted A) EOK* is active. B) Processor asserts PValid* and drives a read or write command. EOK* is deasserted (external agent has killed the processor’s command). C) The external agent must ignore any SysAD and SysCmd data from the processor. Pro Cmd (Rd/Wr) Proc Address C B A SysAD Cycle MasterClcok SysCmd EOK* PValid* Proc Address Pro Cmd (Wr) Proc Data Data Cmd D C B A SysAD Cycle MasterClcok SysCmd EOK* PValid* |
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