M45PE80 datasheet(30/47 Pages) STMICROELECTRONICS

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Instructions

M45PE80

30/47

6.12

Release from Deep Power-down (RDP)

To exit from Deep Power-down mode, the Release from Deep Power-down (RDP)

instruction must be issued. No other instruction must be issued while the device is in this

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 17.

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, tRDP, the device is put in the

Standby 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 17.

Release from Deep Power-down (RDP) instruction sequence

AI06807

34567

tRDP

Stand-by Mode

Deep Power-down Mode

High Impedance

Instruction

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