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M50FW016 Datasheet(PDF) 19 Page - STMicroelectronics |
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M50FW016 Datasheet(HTML) 19 Page - STMicroelectronics |
19 / 45 page 19/45 M50FW016 See Figure 19., Program Suspend and Resume Flowchart, and Pseudo Code, and Figure 22., Erase Suspend and Resume Flowchart, and Pseudo Code, for suggested flowcharts on using the Program/Erase Suspend command. Program/Erase Resume Command. The Pro- gram/Erase Resume command can be used to re- start the Program/Erase Controller after a Program/Erase Suspend has paused it. One Bus Write cycle is required to issue the Program/Erase Resume command. Once the command is issued subsequent Bus Read operations read the Status Register. Table 9. Read Electronic Signature Table 10. Commands Note: X Don’t Care, PA Program Address, PD Program Data, A1,2,3,4 Consecutive Addresses, BA Any address in the Block. Read Memory Array. After a Read Memory Array command, read the memory as normal until another command is issued. Read Status Register. After a Read Status Register command, read the Status Register as normal until another command is issued. Read Electronic Signature. After a Read Electronic Signature command, read Manufacturer Code, Device Code until another com- mand is issued. Block Erase, Program. After these commands read the Status Register until the command completes and another command is is- sued. Quadruple Byte Program (A/A Mux Mode). Addresses A1, A2, A3 and A4 must be consecutive addresses differing only for address bit A0 and A1. After this command, the user should repeatedly read the Status Register until the command has completed, at which point another command can be issued. Quadruple Byte Program (FWH Mode). Aqbp is the start address, A1 and A0 are treated as Don’t Care. The first data byte is pro- grammed at the address that has A1-A0 at 00, the second at the address that has A1-A0 at 01, the third at the address that has A1- A0 at 10, and the fourth at the address that has A1-A0 at 11. After this command, the user should repeatedly read the Status Register until the command has completed, at which point another command can be issued. Chip Erase. This command is only valid in A/A Mux mode. After this command read the Status Register until the command completes and another command is issued. Clear Status Register. After the Clear Status Register command bits 1, 3, 4 and 5 in the Status Register are reset to ‘0’. Program/Erase Suspend. After the Program/Erase Suspend command has been accepted, issue Read Memory Array, Read Status Register, Program (during Erase suspend) and Program/Erase resume commands. Program/Erase Resume. After the Program/Erase Resume command the suspended Program/Erase operation resumes, read the Status Register until the Program/Erase Controller completes and the memory returns to Read Mode. Invalid/Reserved. Do not use Invalid or Reserved commands. Code Address Data Manufacturer Code 00000h 20h Device Code 00001h 2Eh Command Bus Write Operations 1st 2nd 3rd 4th 5th Addr Data Addr Data Addr Data Addr Data Addr Data Read Memory Array 1 X FFh Read Status Register 1 X 70h Read Electronic Signature 1X 90h 1X 98h Program 2X 40h PA PD 2X 10h PA PD Quadruple Byte Program (A/A Mux Mode) 5X 30h A1 PD A2 PD A3 PD A4 PD Quadruple Byte Program (FWH Mode) 2X 30h Aqbp PDqbp Chip Erase 2 X 80h X 10h Block Erase 2 X 20h BA D0h Clear Status Register 1 X 50h Program/Erase Suspend 1 X B0h Program/Erase Resume 1 X D0h Invalid/Reserved 1X 00h 1X 01h 1X 60h 1X 2Fh 1X C0h |
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