M25PE40 Datasheet, PDF (41/60 Pages) STMicroelectronics – 4 Mbit, low voltage, Page-Erasable Serial Flash memory with byte alterability, 50 MHz SPI bus, standard pinout

M25PE40
Instructions
6.17
Release from Deep Power-down (RDP)
Once the device has entered the Deep Power-down mode, all instructions are ignored
except the Release from Deep Power-down (RDP) instruction. Executing this instruction
takes the device out of the Deep Power-down mode.
The Release from Deep Power-down (RDP) instruction is entered by driving Chip Select (S)
Low, followed by the instruction code on Serial Data Input (D). Chip Select (S) must be
driven Low for the entire duration of the sequence.
The instruction sequence is shown in Figure 23.
The Release from Deep Power-down (RDP) instruction is terminated by driving Chip Select
(S) High. Sending additional clock cycles on Serial Clock (C), while Chip Select (S) is driven
Low, cause the instruction to be rejected, and not executed.
After Chip Select (S) has been driven High, followed by a delay, t_RDP, the device is put in the
Standby Power mode. Chip Select (S) must remain High at least until this period is over. The
device waits to be selected, so that it can receive, decode and execute instructions.
Any Release from Deep Power-down (RDP) instruction, while an Erase, Program or Write
cycle is in progress, is rejected without having any effects on the cycle that is in progress.
Figure 23. Release from Deep Power-down (RDP) instruction sequence
S
01234567
t_RDP
C
Instruction
D
High Impedance
Q
Deep Power-down Mode Stand-by Mode
AI06807
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