M58CR064PZB データシートの表示（PDF） - STMicroelectronics

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M58CR064PZB

64 Mbit (4Mb x 16, Dual Bank, Burst) 1.8V Supply Flash Memory

STMicroelectronics 

M58CR064C, M58CR064D, M58CR064P, M58CR064Q

Figure 27. Protection Register Program Flowchart and Pseudo Code

Start

Write C0h

protection_register_program_command (addressToProgram, dataToProgram) {:

writeToFlash (bank_address, 0xC0) ;

Write Address

& Data

Read Status

Register

writeToFlash (addressToProgram, dataToProgram) ;

/*Memory enters read status state after

the Program Command*/

do {

status_register=readFlash (bank_address) ;

/* E or G must be toggled*/

NO

SR7 = 1

YES

NO

SR3 = 0

YES

NO

SR4 = 0

YES

NO

SR1 = 0

YES

End

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

Program to Protected

Block Error (1, 2)

} 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 ( ) ;

}

AI06177

Note: 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.

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