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M28W320FCT Datasheet(PDF) 57 Page - Numonyx B.V |
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M28W320FCT Datasheet(HTML) 57 Page - Numonyx B.V |
57 / 69 page M28W320FCT, M28W320FCB Flowcharts and pseudo codes 57/69 Figure 17. Double Word 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 operations. 3. Address 1 and Address 2 must be consecutive addresses differing only for bit A0. Write 30h AI03539b Start Write Address 1 & Data 1 (3) Read Status Register YES NO b7 = 1 YES NO b3 = 0 NO b4 = 0 VPP Invalid Error (1, 2) Program Error (1, 2) YES End YES NO b1 = 0 Program to Protected Block Error (1, 2) Write Address 2 & Data 2 (3) double_word_program_command (addressToProgram1, dataToProgram1, addressToProgram2, dataToProgram2) { writeToFlash (any_address, 0x30) ; writeToFlash (addressToProgram1, dataToProgram1) ; /*see note (3) */ writeToFlash (addressToProgram2, dataToProgram2) ; /*see note (3) */ /*Memory enters read status state after the Program command*/ 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 ( ) ; 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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