M58LR128HT datasheet(94/112 Pages) STMICROELECTRONICS

Part #	M58LR128HT

Description	128 Mbit (8 Mb 횞16, Multiple Bank, Multilevel interface, Burst) 1.8 V supply Flash memories

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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94 / 112 page

Flowcharts and pseudocodes

M58LR128HT, M58LR128HB

94/112

Figure 20. Blank Check flowchart and pseudocode

1.

Any address within the bank can equally be used.

2.

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 & CBh

Read

Status Register (1)

SR4 = 1

SR5 = 1

SR5 = 0

NO

YES

Command Sequence

Error (2)

YES

Blank Check Error (2)

NO

End

blank_check_command (blockToCheck) {

writeToFlash (blockToCheck, 0xBC);

writeToFlash (blockToCheck, 0xCB);

/* 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.SR4==1) && (status_register.SR5==1)

/* command sequence error */

error_handler () ;

if (status_register.SR5==1)

/* Blank Check error */

error_handler () ;

}

ai10520c

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