SH7262 datasheet(24/45 Pages) RENESAS

24 / 45 page

SH7262/SH7264 Group

High-speed Read/Write Serial Flash Memory

Using the Renesas Serial Peripheral Interface

REJ06B0889-0100/Rev.1.00

June 2009

Page 24 of 45

3.6

Sample Program Listing "serial_flash.c" (3/19)

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void sf_init_serial_flash(void)

{

/* ==== Initializes the RSPI0 ==== */

io_init_rspi();

}

/*""FUNC COMMENT""**************************************************************

* ID

* Outline

: Protect/unprotect operation

*------------------------------------------------------------------------------

* Include

: "serial_flash.h"

*------------------------------------------------------------------------------

* Declaration

: void sf_init_serial_flash(void);

*------------------------------------------------------------------------------

* Description

: Protects or unprotects serial flash memory.

: Use the argument req to specify. Default setting and unprotecting

: method depends on the specifications of the serial flash memory.

*------------------------------------------------------------------------------

* Argument

: enum sf_req req ; I : SF_REQ_UNPROTECT -> Write-enable all sectors

SF_REQ_PROTECT

-> Write-protect all sectors

*------------------------------------------------------------------------------

* Return Value : void

*------------------------------------------------------------------------------

* Note

: None

*""FUNC COMMENT END""**********************************************************/

void sf_protect_ctrl(enum sf_req req)

{

if( req == SF_REQ_UNPROTECT ){

write_status( UNPROTECT_WR_STATUS);

/* Unprotects total area */

}

else{

write_status( PROTECT_WR_STATUS );

/* Protects total area */

}

SH7262 Datasheet(PDF) 24 Page - Renesas Technology Corp

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