
W25Q40BW
9.3
Power-Up Power-Down Timing and Requirements
Parameter
VCC (min) to /CS Low
Time Delay Before Write Instruction
Symbol
t VSL (1)
t PUW (1)
MIN
10
1
spec
MAX
10
Unit
μs
ms
Write Inhibit Threshold Voltage
V WI
(1)
1.0
1.4
V
Note:
1. These parameters are characterized only.
VCC
VCC (max)
Program, Erase and Write Instructions are ignored
/CS must track VCC
VCC (min)
Reset
State
tVSL
Read Instructions
Allowed
Device is fully
Accessible
V WI
tPUW
Time
Figure 37a. Power-up Timing and Voltage Levels
/CS must track VCC
during VCC Ramp Up/Down
VCC
/CS
Time
Figure 37b. Power-up, Power-Down Requirement
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