M28W320EB-ZB Datasheet

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M28W320EBT, M28W320EBB

APPENDIX C. FLOWCHARTS AND PSEUDO CODES

Figure 16. Program Flowchart and Pseudo Code

Start

Write 40h or 10h

program_command (addressToProgram, dataToProgram) {:

writeToFlash (any_address, 0x40) ;

/*or writeToFlash (any_address, 0x10) ; */

writeToFlash (addressToProgram, dataToProgram) ;

/*Memory enters read status state after

the Program Command*/

do {

status_register=readFlash (any_address) ;

/* E or G must be toggled*/

Write Address

& Data

Read Status

Register

b7 = 1

YES

b3 = 0

YES

b4 = 0

YES

b1 = 0

YES

End

NO

} while (status_register.b7== 0) ;

NO

VPP Invalid

Error (1, 2)

if (status_register.b3==1) /*VPP invalid error */

error_handler ( ) ;

NO

Program

Error (1, 2)

if (status_register.b4==1) /*program error */

error_handler ( ) ;

NO

Program to Protected

Block Error (1, 2)

if (status_register.b1==1) /*program to protect block error */

error_handler ( ) ;

}

AI03538b

Note: 1. Status check of b1 (Protected Block), b3 (V

PP

Invalid) and b4 (Program Error) can be made after each program operation or after

a sequence.

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

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