M58WR064HT datasheet(95/111 Pages) NUMONYX

95 / 111 page

M58WR064HT, M58WR064HB

Flowcharts and pseudo codes

95/111

Figure 20.

Double Word 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 operations.

Address 1 and Address 2 must be consecutive addresses differing only for bit A0.

Any address within the bank can equally be used.

Write 35h

AI06171b

Start

Write Address 1

& Data 1 (3, 4)

Read Status

YES

SR7 = 1

YES

SR3 = 0

SR4 = 0

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

YES

End

YES

SR1 = 0

Program to Protected

Block Error (1, 2)

Write Address 2

& Data 2 (3)

double_word_program_command (addressToProgram1, dataToProgram1,

addressToProgram2, dataToProgram2)

{

writeToFlash (addressToProgram1, 0x35);

/*see note (4)*/

writeToFlash (addressToProgram1, dataToProgram1) ;

/*see note (3) */

writeToFlash (addressToProgram2, dataToProgram2) ;

/*see note (3) */

/*Memory enters read status state after

the Program command*/

do {

status_register=readFlash (addressToProgram) ;

"see note (4)"

/* 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) /*program error */

error_handler ( ) ;

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

error_handler ( ) ;

}

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