M45PE80 datasheet(23/36 Pages) STMICROELECTRONICS

23 / 36 page

23/36

M45PE80

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) instruc-

tion. Executing this instruction takes the device out

of the Deep Power-down mode.

The Release from Deep Power-down (RDP) in-

struction is entered by driving Chip Select (S) Low,

followed by the instruction code on Serial Data In-

put (D). Chip Select (S) must be driven Low for the

entire duration of the sequence.

The instruction sequence is shown in Figure 19..

The Release from Deep Power-down (RDP) in-

struction 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 exe-

cuted.

After Chip Select (S) has been driven High, fol-

lowed 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) in-

struction, while an Erase, Program or Write cycle

is in progress, is rejected without having any ef-

fects on the cycle that is in progress.

Figure 19. Release from Deep Power-down (RDP) Instruction Sequence

AI06807

34567

tRDP

Stand-by Mode

Deep Power-down Mode

High Impedance

Instruction

M45PE80 Datasheet(PDF) 23 Page - STMicroelectronics