AT25SF321B datasheet(41/61 Pages) DIALOG

41 / 61 page

AT25SF321B

DS-AT25SF321B–179E–06-2020

11.3 Write Enable for Volatile Status Register (50h)

The non-volatile Status Register bits can be written to as volatile bits. During power up reset, the non-volatile

Status Register bits are copied to a volatile version of the Status Register that is used during device operation. This

gives more flexibility to change the system configuration and memory protection schemes quickly without waiting

for the typical non-volatile bit write cycles or affecting the endurance of the Status Register non-volatile bits.

To write the volatile version of the Status Register bits, the Write Enable for Volatile Status Register (50h)

instruction must be issued prior to each Write Status Registers (01h) instruction. The Write Enable for Volatile

Status Register instruction does not set the Write Enable Latch bit. It is valid only for the next Write Status

Registers instruction, to change the volatile Status Register bit values.

Figure 11-4. Write Enable for Volatile Status Register

Table 11-5. Write Status Register 1

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

SRP0

BP4

BP3

BP2

BP1

BP0

WEL

RDY/BSY

Table 11-6.Write Status Register 2

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

E_SUS

CMP

LB3

LB2

LB1

P_SUS

SRP1

Table 11-7.Write Status Register 3

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reserved

DRV1

DRV0

Reserved

SCK

MSB

01010000

OPCODE

HIGH-IMPEDANCE

AT25SF321B Datasheet(PDF) 41 Page - Dialog Semiconductor

AT25SF321B Datasheet(HTML) 41 Page - Dialog Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

Datasheet Download

Link URL