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W25Q16JVSSIQ Datasheet(PDF) 42 Page - Winbond |
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W25Q16JVSSIQ Datasheet(HTML) 42 Page - Winbond |
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42 / 75 page  W25Q16JV - 41 - Power-down (B9h) Although the standby current during normal operation is relatively low, standby current can be further reduced with the Power-down instruction. The lower power consumption makes the Power-down instruction especially useful for battery powered applications (See ICC1 and ICC2 in AC Characteristics). The instruction is initiated by driving the /CS pin low and shifting the instruction code “B9h” as shown in Figure 37. The /CS pin must be driven high after the eighth bit has been latched. If this is not done the Power-down instruction will not be executed. After /CS is driven high, the power-down state will entered within the time duration of tDP (See AC Characteristics). While in the power-down state only the Release Power-down / Device ID (ABh) instruction, which restores the device to normal operation, will be recognized. All other instructions are ignored. This includes the Read Status Register instruction, which is always available during normal operation. Ignoring all but one instruction makes the Power Down state a useful condition for securing maximum write protection. The device always powers-up in the normal operation with the standby current of ICC1. Figure 37. Deep Power-down Instruction /CS CLK DI (IO 0) Mode 0 Mode 3 0 1 2 3 4 5 6 7 Instruction (B9h) Mode 0 Mode 3 tDP Power-down current Stand-by current |
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