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S29CD032J0JQFI000 데이터시트(PDF) 29 Page - SPANSION |
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S29CD032J0JQFI000 데이터시트(HTML) 29 Page - SPANSION |
29 / 76 page September 27, 2006 S29CD-J_CL-J_00_B1 S29CD-J & S29CL-J Flash Family 27 Da ta Shee t (Prelim i nar y ) margin. Section 20.1, Command Definitions on page 69 shows the address and data requirements for the program command sequence. Note the following: When the Embedded Program algorithm is complete, the device returns to the read mode and address are no longer latched. An address change is required to begin reading valid array data. The system can determine the status of the program operation by using DQ7, DQ6 or RY/BY#. Refer to Section 8.8, Write Operation Status on page 31 for information on these status bits. A “0” cannot be programmed back to a “1.” Attempting to do so may halt the operation and set DQ5 to 1, or cause the Data# Polling algorithm to indicate the operation was successful. . A succeeding read shows that the data is still “0.” Only erase operations can convert a “0” to a “1.” Any commands written to the device during the Embedded Program Algorithm are ignored except the Program Suspend command. A hardware reset immediately terminates the program operation; the program command sequence should be re-initiated once the device has returned to the read mode, to ensure data integrity. Figure 8.5 Program Operation Note See Table 19.1 and Table 20.2 for program command sequence. 8.7.2 Sector Erase The sector erase function erases one or more sectors in the memory array. (See Table 20.1, Memory Array Command Definitions (x32 Mode), on page 69 and Figure 8.6, Erase Operation, on page 29.) The device does not require the system to preprogram prior to erase. The Embedded Erase algorithm automatically programs and verifies the entire memory for an all-zero data pattern prior to electrical erase. After a START Write Program Command Sequence Data Poll from System Verify Data? No Yes Last Address? No Yes Programming Completed Increment Address Embedded Program algorithm in progress |
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