M58WR064HT datasheet(94/111 Pages) NUMONYX

Part #	M58WR064HT

Description	64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V supply Flash memories

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Manufacturer	NUMONYX [Numonyx B.V]

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Flowcharts and pseudo codes

M58WR064HT, M58WR064HB

94/111

Appendix C

Flowcharts and pseudo codes

Figure 19.

Program Flowchart and Pseudo Code

1.

Status check of SR1 (Protected Block), SR3 (VPP Invalid) and SR4 (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.

3.

Any address within the bank can equally be used.

Write 40h or 10h (3)

AI06170b

Start

Write Address

& Data

Read Status

Register (3)

YES

NO

SR7 = 1

YES

NO

SR3 = 0

NO

SR4 = 0

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

program_command (addressToProgram, dataToProgram) {:

"

writeToFlash (addressToProgram, 0x40);

/*writeToFlash (addressToProgram, 0x10);*/

/*see note (3)*/

"

do {

status_register=readFlash (addressToProgram);

"see note (3)";

/* E or G must be toggled*/

} while (status_register.SR7== 0) ;

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

error_handler ( ) ;

YES

End

YES

NO

SR1 = 0

Program to Protected

Block Error (1, 2)

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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