MB85AS12MT

DS501-00071-1v1-E

11



SLEEP/PWDN

The SLEEP/PWDN command shifts the LSI to a low power mode called “SLEEP mode” (“Power Down

mode”). The transition to the SLEEP mode (Power Down mode) is carried out at the rising edge of CS after

operation code in the SLEEP (PWDN) command. However, when at least one SCK clock is inputted before

the rising edge of CS after operation code in the SLEEP (PWDN) command, this SLEEP (PWDN) command

is canceled.

After the SLEEP mode (Power Down mode) transition, SCK and SI/SO inputs are ignored.

Returning to a normal operation from the SLEEP mode (Power Down mode) is carried out after tREC time

from the falling edge of CS (see the figure below). It is possible to return CS to H level before tREC time.

However, it is prohibited to bring down CS to L level again during tREC period.

Enter Sleep Mode

CS

SCK

SI Invalid

Invalid

High-Z

Sleep Mode Entry

67

012345

SO

1

1011100

CS

CS

tREC

Exit Sleep Mode

Sleep Mode Exit

tCSWL

From this time

Command input enable