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S71PL129JC0 Datasheet(PDF) 136 Page - SPANSION |
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S71PL129JC0 Datasheet(HTML) 136 Page - SPANSION |
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136 / 153 page  134 S71PL129JC0/S71PL129JB0/S71PL129JA0 S71PL129Jxx_00_A8 October 28, 2005 Advance Info rmation The first cycle reads from the most significant address (MSB). The second and third cycle are to write back the data (RDa) read by first cycle. If the second or third cycle is written into the different address, the program is cancelled, and the data written by the second or third cycle is valid as a normal write operation. The fourth and fifth cycles write to MSB. The data from the fourth and fifth cycles is “don’t care.” If the fourth or fifth cycles are written into different address, the program is also cancelled but write data might not be written as normal write operation. The last cycle is to read from specific address key for mode selection. Once this program sequence is performed from a Partial mode to the other Partial mode, the writ- ten data stored in memory cell array can be lost. So, it should perform this program prior to regular read/write operation if Partial mode is used. Address Key The address key has following format. 3rd Write 3FFFFFh RDa 4th Write 3FFFFFh Don’t Care (X) 5th Write 3FFFFFh X 6th Read Address Key Read Data (RDb) Mode Address 32M 64M A21 A20 A19 A18 - A0 Binary Sleep (default) Sleep (default) 1 1 1 1 3FFFFFh 4M Partial N/A 1 1 0 1 37FFFFh 8M Partial 8M Partial 1 0 1 1 2FFFFFh N/A 16M Partial 1 0 0 1 27FFFFh Cycle # Operation Address Data |
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