SH7708 datasheet(292/633 Pages) RENESAS

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SH7708 Folha de dados(PDF) 292 Page - Renesas Technology Corp

Nome de Peças	SH7708

Descrição Electrónicos	SuperH??RISC engine

PDF	633 Pages

Scroll/Zoom	100%

Fabricante Electrônico	RENESAS [Renesas Technology Corp]

Página de início	http://www.renesas.com

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292 / 633 page

274

Wait State Control: As the clock frequency increases, it becomes impossible to complete all

states in one cycle as in basic access. Therefore, provision is made for state extension by using the

setting bits in WCR2 and MCR. The timing with state extension using these settings is shown in

figure 10.35. Additional Tpc cycles (cycles used to secure the

CE precharge time) can be inserted

by means of the TPC bits in MCR. The number of

OE and WEn assert cycles from RAS assertion

to CAS assertion can be varied between 1 and 3 according to the setting of A3W1 and A3W0 in

WCR2. Trw cycles can be inserted by means of the RCD bits in MCR, and the number of cycles

from

CE assertion to BS assertion and write data output can be varied between 1 and 4.

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