SH7262 datasheet(29/45 Pages) RENESAS

29 / 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 29 of 45

3.11

Sample Program Listing "serial_flash.c" (8/19)

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

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

* ID

* Outline

: Write disable

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

* Include

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

* Declaration

: static void write_disable(void);

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

* Description

: Issues the Write Disable command to disable erasing or programming

: serial flash memory.

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

* Argument

: void

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

* Return Value : void

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

* Note

: None

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

static void write_disable(void)

{

unsigned char cmd[1];

cmd[0] = SFLASHCMD_WRITE_DISABLE;

io_cmd_exe(cmd, 1, NULL, 0);

}

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

* ID

* Outline

: Busy wait

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

* Include

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

* Declaration

: static void busy_wait(void);

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

* Description

: Loops internally when the serial flash memory is busy.

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

* Argument

: void

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

* Return Value : void

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

* Note

: None

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

static void busy_wait(void)

{

while ((read_status() & 0x01) != 0) {

/* RDY/BSY */

/* serial flash is busy */

}

SH7262 bảng dữ liệu(PDF) 29 Page - Renesas Technology Corp

SH7262 bảng dữ liệu(HTML) 29 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

bảng dữ liệu tải về

Link URL