M58PR256J datasheet(104/114 Pages) STMICROELECTRONICS

부품명	M58PR256J

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

PDF	114 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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104 / 114 page

Flowcharts and pseudo codes

M58PR256J, M58PR512J

104/114

Figure 27.

Protection Register Program flowchart and pseudo code

Status check of SR1 (Protected Block), SR3 (VPP Invalid) and SR4 (Program Error) can be made after each program

operation or after a sequence.

If an error is found, the Status Register must be cleared before further Program/Erase Controller operations.

Write C0h (1)

AI06177c

Start

Write Address

& Data

Read Status

YES

SR7 = 1

YES

SR3 = 0

SR4 = 0

VPP Invalid

Error (2, 3)

Program

Error (2, 3)

protection_register_program_command (addressToProgram, dataToProgram) {:

writeToFlash (addressToProgram, 0xC0) ;

/*see note (1) */

do {

status_register=readFlash (addressToProgram) ;

/* see note (1) */

/* E or G must be toggled*/

} while (status_register.SR7== 0) ;

if (status_register.SR3==1) /*VPP invalid error */

error_handler ( ) ;

YES

End

YES

SR1 = 0

Program to Protected

Block Error (2, 3)

writeToFlash (addressToProgram, dataToProgram) ;

/*Memory enters read status state after

the Program Command*/

if (status_register.SR4==1) /*program error */

error_handler ( ) ;

if (status_register.SR1==1) /*program to protect block error */

error_handler ( ) ;

}

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