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M58WR016QT Datasheet(PDF) 100 Page - Numonyx B.V |
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M58WR016QT Datasheet(HTML) 100 Page - Numonyx B.V |
100 / 110 page ![]() Flowcharts and pseudo codes M58WR016QT, M58WR016QB, M58WR032QT, M58WR032QB 100/110 Figure 27. Protection Register 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 C0h (3) AI06177b 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) protection_register_program_command (addressToProgram, dataToProgram) {: writeToFlash (addressToProgram, 0xC0) ; /*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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