M58PR256J datasheet(103/114 Pages) STMICROELECTRONICS

Part #	M58PR256J

Description	256 Mbit or 512 Mbit (x16, Multiple Bank, Multilevel, Burst) 1.8 V supply Flash memories

PDF	114 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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103 / 114 page

M58PR256J, M58PR512J

Flowcharts and pseudo codes

103/114

Figure 26.

Blank Check flowchart and pseudo code

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 () ;

}

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M58PR256J Datasheet(PDF) 103 Page - STMicroelectronics

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