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M58CR032C Datasheet(PDF) 21 Page - STMicroelectronics |
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M58CR032C Datasheet(HTML) 21 Page - STMicroelectronics |
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21 / 63 page  21/63 M58CR032C, M58CR032D Read operations in the bank being programmed output the Status Register content after the pro- gramming has started. During Double Word Program operations the bank being programmed will only accept the Read Sta- tus Register command and the Program/Erase Suspend command. Typical Program times are given in Table 12, Program, Erase Times and Pro- gram/Erase Endurance Cycles. Programming aborts if Reset goes to VIL. As data integrity cannot be guaranteed when the program operation is aborted, the block containing the memory location must be erased and repro- grammed. See Appendix B, Figure 19, Double Word Program Flowchart and Pseudo Code, for the flowchart for using the Double Word Program command. Quadruple Word Program Command This feature is offered to improve the programming throughput, writing a page of four adjacent words in parallel. The four words must differ only for the addresses A0 and A1. The first write cycle must be addressed to the bank to be programmed. Only one bank can be programmed at any one time. The other bank must be in Read mode or Erase Suspend. Programming should not be attempted when VPP is not at VPPH. The command can be executed if VPP is below VPPH but the result is not guaranteed. Five bus write cycles are necessary to issue the Quadruple Word Program command. s The first bus cycle sets up the Double Word Program Command. s The second bus cycle latches the Address and the Data of the first word to be written. s The third bus cycle latches the Address and the Data of the second word to be written. s The fourth bus cycle latches the Address and the Data of the third word to be written. s The fifth bus cycle latches the Address and the Data of the fourth word to be written and starts the Program/Erase Controller. Read operations to the bank being programmed output the Status Register content after the pro- gramming has started. Programming aborts if Reset goes to VIL. As data integrity cannot be guaranteed when the program operation is aborted, the block containing the memory location must be erased and repro- grammed. During Quadruple Word Program operations the bank being programmed will only accept the Read Status Register command and the Program/Erase Suspend command. Typical Program times are given in Table 12, Program, Erase Times and Pro- gram/Erase Endurance Cycles. See Appendix B, Figure 20, Quadruple Word Pro- gram Flowchart and Pseudo Code, for the flow- chart for using the Quadruple Word Program command. Program/Erase Suspend Command The Program/Erase Suspend command is used to pause a Program or Erase operation. One bus write cycle is required to issue the Program/Erase command and pause the Program/Erase control- ler. The command must be addressed to the bank containing the program or erase operation. During Program/Erase Suspend the Command In- terface will accept the Program/Erase Resume, Read, Read Status Register, Read Electronic Sig- nature and Read CFI Query commands. Addition- ally, if the suspend operation was Erase then the Program, Block Lock, Block Lock-Down or Protec- tion Program commands will also be accepted. The block being erased may be protected by issu- ing the Block Lock, Block Lock-Down or Protection Program commands. Only the blocks not being erased may be read or programmed correctly. When the Program/Erase Resume command is is- sued the operation will complete. During a Program/Erase Suspend, the device can be placed in a pseudo-standby mode by taking Chip Enable to VIH. Program/Erase is aborted if Reset turns to VIL. See Appendix B, Figure 21, Program Suspend & Resume Flowchart and Pseudo Code, and Figure 23, Erase Suspend & Resume Flowchart and Pseudo Code for flowcharts for using the Program/ Erase Suspend command. Program/Erase Resume Command The Program/Erase Resume command can be used to restart the Program/Erase Controller after a Program/Erase Suspend command has paused it. One Bus Write cycle is required to issue the command. The command must be addressed to the bank containing the program or erase opera- tion. Once the command is issued subsequent Bus Read operations read the Status Register. If a Program command is issued during a Block Erase Suspend, then the erase cannot be re- sumed until the programming operation has com- pleted. It is possible to accumulate suspend operations. For example: suspend an erase oper- ation, start a programming operation, suspend the programming operation then read the array. See Appendix B, Figure 21, Program Suspend & Re- sume Flowchart and Pseudo Code, and Figure 23, Erase Suspend & Resume Flowchart and Pseudo Code for flowcharts for using the Program/Erase Resume command. |
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