SH7262 datasheet(26/45 Pages) RENESAS

26 / 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 26 of 45

3.8

Sample Program Listing "serial_flash.c" (5/19)

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

void sf_sector_erase(int sector_no)

{

unsigned char cmd[4];

unsigned long addr = sector_no * SF_SECTOR_SIZE;

cmd[0] = SFLASHCMD_SECTOR_ERASE;

cmd[1] = (addr >> 16) & 0xff;

cmd[2] = (addr >>

8) & 0xff;

cmd[3] =

addr

& 0xff;

write_enable();

io_cmd_exe(cmd, 4, NULL, 0);

busy_wait();

}

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

* ID

* Outline

: Program data

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

* Include

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

* Declaration

: void sf_byte_program(unsigned long addr, unsigned char *buf, int size);

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

* Description

: Programs the specified data in serial flash memory.

: Before erasing or programming, issue the Write Enable command.

: After erasing or programming, make sure to check the status of

: serial flash memory if it is not busy.

: The maximum write data size depends on the type of the device.

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

* Argument

: unsigned long addr ; I : Address in serial flash memory to write

: unsigned char *buf ; I : Buffer address to store the write data

: int size

; I : Number of bytes to write

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

* Return Value : void

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

* Note

: None

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

void sf_byte_program(unsigned long addr, unsigned char *buf, int size)

{

unsigned char cmd[4];

cmd[0] = SFLASHCMD_BYTE_PROGRAM;

cmd[1] = (unsigned char)((addr >> 16) & 0xff);

cmd[2] = (unsigned char)((addr >>

8) & 0xff);

cmd[3] = (unsigned char)( addr

& 0xff);

write_enable();

io_cmd_exe(cmd, 4, buf, size);

busy_wait();

}

SH7262 Datasheet(PDF) 26 Page - Renesas Technology Corp

SH7262 Datasheet(HTML) 26 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

Datasheet Download

Link URL