AT25DF161_13 datasheet(37/52 Pages) ETC2

37 / 52 page

AT25DF161

Figure 12-2. Read Manufacturer and Device ID

12.3

Deep Power-Down

During normal operation, the device will be placed in the standby mode to consume less power as long as the CS pin

remains deasserted and no internal operation is in progress. The Deep Power-Down command offers the ability to place

the device into an even lower power consumption state called the Deep Power-Down mode.

When the device is in the Deep Power-Down mode, all commands including the Read Status Register command will be

ignored with the exception of the Resume from Deep Power-Down command. Since all commands will be ignored, the

mode can be used as an extra protection mechanism against program and erase operations.

Entering the Deep Power-Down mode is accomplished by simply asserting the CS pin, clocking in the opcode of B9h, and

then deasserting the CS pin. Any additional data clocked into the device after the opcode will be ignored. When the CS pin

is deasserted, the device will enter the Deep Power-Down mode within the maximum time of tEDPD.

The complete opcode must be clocked in before the CS pin is deasserted, and the CS pin must be deasserted on an even

byte boundary (multiples of eight bits); otherwise, the device will abort the operation and return to the standby mode

once the CS pin is deasserted. In addition, the device will default to the standby mode after a power-cycle.

Table 12-2.

Manufacturer and Device ID Details

Data Type

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Hex

Value

Details

Manufacturer ID

JEDEC Assigned Code

1Fh

JEDEC Code:

0001 1111 (1Fh for Adesto)

00011111

Device ID (Part 1)

Family Code

Density Code

46h

Family Code:

010 (AT25DF/26DFxxx series)

Density Code:

00110 (16-Mbit)

01000110

Device ID (Part 2)

Sub Code

Product Version Code

02h

Sub Code:

000 (Standard series)

Product Version:00010 (Second major version)

00000010

SCK

Note: Each transition

shown for SI and SO represents one byte (8 bits)

3687H–DFLASH–5/2013

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