AT45DB161E datasheet(44/80 Pages) DIALOG

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AT45DB161E

DS-AT45DB161E–8782N–03-2021

Software Reset

In some applications, it might be necessary to prematurely terminate a program or erase cycle early rather than

wait the hundreds of microseconds or milliseconds necessary for the program or erase operation to complete

normally. The Software Reset command allows a program or erase operation in progress to be ended abruptly and

returns the device to an idle state.

To perform a Software Reset, the CS pin must be asserted and a four-byte command sequence of F0h, 00h, 00h,

and 00h must be clocked into the device. Any additional data clocked into the device after the last byte is ignored.

When the CS pin is deasserted, the program or erase operation currently in progress is terminated within a time

tSWRST. Since the program or erase operation might not complete before the device is reset, the contents of the

page being programmed or erased cannot be guaranteed to be valid.

The Software Reset command has no effect on the states of the Sector Protection Register, the Sector Lockdown

are reset back to their default states. If a Software Reset operation is performed while a sector is erase suspended,

the suspend operation aborts and the contents of the page or block being erased in the suspended sector is left in

an undefined state. If a Software Reset is performed while a sector is program suspended, the suspend operation

aborts and the contents of the page that was being programmed and subsequently suspended is undefined. The

remaining pages in the sector retain their previous contents.

The complete four-byte opcode must be clocked into the device before the CS pin is deasserted, and the CS pin

must be deasserted on a byte boundary (multiples of eight bits); otherwise, no reset operation is performed.

Table 14-1. Software Reset

Figure 14-1. Software Reset

Command

Byte 1

Byte 2

Byte 3

Byte 4

Software Reset

F0h

00h

F0h

00h

Each transition represents eight bits

AT45DB161E Datasheet(PDF) 44 Page - Dialog Semiconductor