IS25LP256D-RLLA3 datasheet(148/174 Pages) ISSI

148 / 174 page

IS25LP256D

IS25WP256D

Integrated Silicon Solution, Inc.- www.issi.com

148

Rev A6

04/15/2019

8.55 ERASE PPB OPERATION (ERPPB, E4h)

The Erase PPB (ERPPB) command sets all PPB bits to “1”. Before the ERPPB command can be accepted by the

device, a Write Enable (WREN) command must be issued and decoded by the device, which sets the Write Enable

Latch (WEL) in the Status Register to enable any write operations.

The instruction code is shifted in by the rising edges of the SCK signal. CE# must be driven high after the eighth

bit of the instruction byte has been latched in. This will initiate the beginning of internal erase cycle, which involves

the pre-programming and erase of the entire PPB memory array. Without CE# being driven high after the eighth

bit of the instruction, the PPB erase operation will not be executed.

With the internal erase cycle in progress, the user can read the value of the Write In Progress (WIP) bit to check if

the operation has been completed. The WIP bit will indicate “1” when the erase cycle is in progress and “0” when

the erase cycle has been completed. When the ERPPB operation

is completed, the WEL is set to “0”. Erase

suspend is not allowed during PPB Erase.

Figure 8.130 Erase PPB Sequence In SPI Mode

Instruction = E4h

CE#

SCK

Mode 3

Mode 0

High Impedance

Figure 8.131 Erase PPB Sequence In QPI Mode

E4h

CE#

SCK

IO[3:0]

Mode 3

Mode 0

IS25LP256D-RLLA3 Datasheet(PDF) 148 Page - Integrated Silicon Solution, Inc