M58PR256LE datasheet(108/119 Pages) STMICROELECTRONICS

部件名	M58PR256LE

功能描述	256-Mbit, 512-Mbit or 1-Gbit (횞 16, multiple bank, multilevel, burst) 1.8 V supply Flash memories

PDF	119 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

108 / 119 page

Flowcharts and pseudocodes

M58PR256LE, M58PR512LE, M58PR001LE

108/119

Figure 26.

Blank check flowchart and pseudocode

Any address within the bank can equally be used.

If an error is found, the Status Register must be cleared before further program/erase operations.

Write Block

Address & BCh

Start

SR7 = 1

Write Block

Address & D0h

Read

Status Register (1)

SR1 = 0

SR3 = 0

SR4 = 1

SR5 = 1

SR5 = 0

YES

VPP Invalid

Error (2)

Command Sequence

Error (2)

YES

Erase Error (2)

Protected Block

Error (2)

End

blank_check_command (blockToCheck) {

writeToFlash (blockToCheck, 0xBC);

writeToFlash (blockToCheck, 0xD0);

/* Memory enters read status state after

the Blank Check Command */

do {

status_register = readFlash (blockToCheck);

/* see note (1) */

/* E or G must be toggled */

} while (status_register.SR7==0);

if (status_register.SR3==1)

/* VPP invalid error */

error_handler () ;

if (status_register.SR4==1) && (status_register.SR5==1)

/* command sequence error */

error_handler () ;

if (status_register.SR5==1)

/* erase error */

error_handler () ;

if (status_register.SR1==1)

/* protected block error */

error_handler () ;

}

ai10520

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