SH7041A datasheet(242/923 Pages) RENESAS

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SH7041A 데이터시트(PDF) 242 Page - Renesas Technology Corp

부품명	SH7041A

상세설명	Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)

PDF	923 Pages

Scroll/Zoom	100%

제조업체	RENESAS [Renesas Technology Corp]

홈페이지	http://www.renesas.com

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204

to cause the external device to negate the

BREQ and return the bus rights to the SH7040 Series.

Please note that if the external device does not return the bus rights within the time prescribed for

the DRAM refresh interval, this LSI will not be able to perform the refresh operation and the

DRAM contents cannot be guaranteed.

Figure 10.22 shows the bus right release procedure.

BREQ = Low

SH704X

BREQ accepted

Strobe pin:

high-level output

Address, data,

strobe pin:

high impedance

Bus right release

response

Bus right release status

External device

Bus right request

BACK confirmation

Bus right acquisition

BACK = Low

Figure 10.22 Bus Right Release Procedure

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