M36W432BGZAT データシートの表示（PDF） - STMicroelectronics

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M36W432BGZAT

32 Mbit (2Mb x16, Boot Block) Flash Memory and 4 Mbit (256Kb x16) SRAM, Multiple Memory Product

STMicroelectronics 

APPENDIX C. FLASH FLOWCHARTS AND PSEUDO CODES

Figure 25. Flash Program Flowchart and Pseudo Code

M36W432TG, M36W432BG

Start

Write 40h or 10h

Write Address

& Data

Read Status

Register

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) ;

/* EF or GF must be toggled*/

NO

b7 = 1

YES

NO

b3 = 0

YES

NO

b4 = 0

YES

NO

b1 = 0

YES

End

VPPF Invalid

Error (1, 2)

Program

Error (1, 2)

Program to Protected

Block Error (1, 2)

} while (status_register.b7== 0) ;

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

error_handler ( ) ;

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

error_handler ( ) ;

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

error_handler ( ) ;

}

AI07932

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