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M58CR064C Datasheet(PDF) 12 Page - STMicroelectronics |
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M58CR064C Datasheet(HTML) 12 Page - STMicroelectronics |
12 / 70 page M58CR064C, M58CR064D, M58CR064P, M58CR064Q 12/70 COMMAND INTERFACE All Bus Write operations to the memory are inter- preted by the Command Interface. Commands consist of one or more sequential Bus Write oper- ations. An internal Program/Erase Controller han- dles all timings and verifies the correct execution of the Program and Erase commands. The Pro- gram/Erase Controller provides a Status Register whose output may be read at any time to monitor the progress or the result of the operation. The Command Interface is reset to read mode when power is first applied, when exiting from Re- set or whenever VDD is lower than VLKO. Com- mand sequences must be followed exactly. Any invalid combination of commands will reset the de- vice to read mode. Refer to Table 4, Command Codes and Appendix D, Tables 36 and 37, Command Interface States - Modify and Lock Tables, for a summary of the Command Interface. The Command Interface is split into two types of commands: Standard commands and Factory Program commands. The following sections ex- plain in detail how to perform each command. Table 4. Command Codes Hex Code Command 01h Block Lock Confirm 03h Set Configuration Register Confirm 10h Alternative Program Setup 20h Block Erase Setup 2Fh Block Lock-Down Confirm 30h Double Word Program Setup 40h Program Setup 50h Clear Status Register 55h Quadruple Word Program Setup 60h Block Lock Setup, Block Unlock Setup, Block Lock Down Setup and Set Configuration Register Setup 70h Read Status Register 80h Bank Erase Setup 90h Read Electronic Signature 98h Read CFI Query B0h Program/Erase Suspend C0h Protection Register Program D0h Program/Erase Resume, Block Erase Confirm, Bank Erase Confirm, Block Unlock Confirm FFh Read Array |
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