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S29GL01GT11FAIyyx Fiches technique(PDF) 22 Page - Cypress Semiconductor |
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S29GL01GT11FAIyyx Fiches technique(HTML) 22 Page - Cypress Semiconductor |
22 / 105 page Document Number: 002-00247 Rev. *G Page 22 of 105 S29GL01GT, S29GL512T 5.4 Command Set 5.4.1 Program Methods 5.4.1.1 Word Programming Word programming is used to program a single word anywhere in the main Flash Memory Array. The Word Programming command is a four-write-cycle sequence. The program command sequence is initiated by writing two unlock write cycles, followed by the program set up command. The program address and data are written next, which in turn initiate the Embedded Word Program algorithm. The system is not required to provide further controls or timing. The device automatically generates the program pulses and verifies the programmed cell margin internally. When the Embedded Word Program algorithm is complete, the EAC then returns to its standby mode. The system can determine the status of the program operation by using Data Polling Status, reading the Status Register, or monitoring the RY/BY# output. See Status Register on page 36 for information on these status bits. See Data Polling Status on page 37 for information on these status bits. See Figure 5.1 on page 22 for a diagram of the word programming operation. Any commands other than Program Suspend written to the device during the Embedded Program algorithm are ignored. Note that a hardware reset (RESET# = VIL) immediately terminates the programming operation and returns the device to read mode after tRPH time. To ensure data integrity, the Program command sequence should be reinitiated once the device has completed the hardware reset operation. A modified version of the Word Programming command, without unlock write cycles, is used for programming when entered into the Lock Register, Password, and PPB ASOs or the Unlock Bypass mode. The same command is used to change volatile bits when entered in to the PPB Lock, and DYB ASOs. See Table 7.1 on page 48 for program command sequences. Figure 5.1 Word Program Operation START Write Program Command Sequence Data Poll from System Verify Word? Last Addresss? Increment Address Embedded Program algorithm in progress Programming Completed No No Yes Yes |
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