m28w320fct datasheet(56/69 Pages) NUMONYX

Part #	M28W320FCT

Description	32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory

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Manufacturer	NUMONYX [Numonyx B.V]

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Flowcharts and pseudo codes

M28W320FCT, M28W320FCB

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Appendix C

Flowcharts and pseudo codes

Figure 16.

Program Flowchart and Pseudo Code

1.

Status check of b1 (Protected Block), b3 (VPP 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.

Write 40h or 10h

AI03538b

Start

Write Address

& Data

Read Status

Register

YES

NO

b7 = 1

YES

NO

b3 = 0

NO

b4 = 0

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

program_command (addressToProgram, dataToProgram) {:

writeToFlash (any_address, 0x40) ;

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

do {

status_register=readFlash (any_address) ;

/* E or G must be toggled*/

} while (status_register.b7== 0) ;

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

error_handler ( ) ;

YES

End

YES

NO

b1 = 0

Program to Protected

Block Error (1, 2)

writeToFlash (addressToProgram, dataToProgram) ;

/*Memory enters read status state after

the Program Command*/

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

error_handler ( ) ;

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

error_handler ( ) ;

}

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