SH7708 datasheet(282/633 Pages) RENESAS

Il numero della parte	SH7708

Spiegazioni elettronici	SuperH??RISC engine

PDF	633 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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Single Write: The basic timing chart for write access is shown in figure 10.28. In a single write

operation, following the Tr cycle in which ACTV command output is performed, a WRITA

command that performs auto-precharge is issued in the Tc1 cycle. In the write cycle, the write data

is output at the same time as the write command. For the write with auto-precharge command,

precharging of the relevant bank is performed in synchronous DRAM after completion of the write

command, and therefore no command can be issued for the same bank until precharging is

completed. Consequently, in addition to the precharge wait cycle, Tpc, used in a read access, cycle

Trwl is also added as a wait interval until precharging is started following the write command.

Issuance of a new command for the same bank is postponed during this interval. The number of

Trwl cycles can be specified by the TRWL bit in MCR.

SH7708 Scheda tecnica(PDF) 282 Page - Renesas Technology Corp