IS25WP064A-RKLE datasheet(56/111 Pages) ISSI

Part #	IS25WP064A-RKLE

Description	1.8V SERIAL FLASH MEMORY WITH 133MHZ MULTI I/O SPI & QUAD I/O QPI DTR INTERFACE

PDF	111 Pages

Scroll/Zoom	100%

Manufacturer	ISSI [Integrated Silicon Solution, Inc]

Direct Link	http://www.issi.com

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56 / 111 page

IS25WP064A/032A

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

Rev. 00D

03/01/2016

8.19 WRITE FUNCTION REGISTER OPERATION (WRFR, 42h)

The Write Function Register (WRFR) instruction allows the user to disable dedicated RESET# on 16-pin SOIC or

24-ball TFBGA

by setting RESET# Enable/Disable bit to “1” in the case that the default value of the bit is “0” and

to change from top block area (default) to bottom block area by

setting TBS bit to “1”. Also Information Row Lock

bits (IRL3~IRL0) can be set to “1” individually by WRFR instruction in order to lock Information Row. Since

RESER# Enable/Disable bit, TBS bit, and IRL bits are OTP, once it is set to “1”, it cannot be set back to “0” again.

Figure 8.32 Write Function Register Sequence In SPI Mode

Instruction = 42h

CE #

SCK

Data In

Mode 3

Mode 0

High Impedence

Figure 8.33 Write Function Register Sequence In QPI Mode

42h

Mode 3

Mode 0

7:4

3:0

CE#

SCK

IO[3:0]

Data In

IS25WP064A-RKLE Datasheet(PDF) 56 Page - Integrated Silicon Solution, Inc