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LE25FU406B Datasheet(PDF) 11 Page - Sanyo Semicon Device |
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LE25FU406B Datasheet(HTML) 11 Page - Sanyo Semicon Device |
11 / 22 page LE25FU406B No.A1066-11/22 3. Write Enable Before performing any of the operations listed below, the device must be placed in the write enable state. Operation is the same as for setting status register WEN to "1", and the state is enabled by inputting the write enable command. "Figure 8 Write Enable" shows the timing waveforms when the write enable operation is performed. The write enable command consists only of the first bus cycle, and it is initiated by inputting (06h). • Small sector erase, sector erase, chip erase • Page program • Status register write 4. Write Disable The write disable command sets status register WEN to "0" to prohibit unintentional writing. "Figure 9 Write Disable" shows the timing waveforms. The write disable command consists only of the first bus cycle, and it is initiated by inputting (04h). The write disable state (WEN "0") is exited by setting WEN to "1" using the write enable command (06h). Figure 8 Write Enable Figure 9 Write Disable 5. Power-down The power-down command sets all the commands, with the exception of the silicon ID read command and the command to exit from power-down, to the acceptance prohibited state (power-down). "Figure 10 Power-down" shows the timing waveforms. The power-down command consists only of the first bus cycle, and it is initiated by inputting (B9h). However, a power-down command issued during an internal write operation will be ignored. The power-down state is exited using the power-down exit command (power-down is exited also when one bus cycle or more of the silicon ID read command (ABh) has been input). "Figure 11 Exiting from Power-down" shows the timing waveforms of the power-down exit command. Figure 10 Power-down Figure 11 Exiting from Power-down SCK SI High Impedance SO CS 06h 0 1 2 3 4 5 6 7 Mode3 Mode0 8CLK SCK SI High Impedance SO CS 04h 012 3 4 5 6 7 Mode3 Mode0 8CLK SCK SI High Impedance SO CS B9h 0 1 2 3 4 5 6 7 Mode3 Mode0 8CLK SCK SI High Impedance SO CS ABh 012 3 4 5 6 7 Mode3 Mode0 8CLK tPRB tDP Power down mode Power down mode |
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