Datasheet

SST26VF064B / SST26VF064BA
DS20005119G-page 34  2015 Microchip Technology Inc.
5.32 Write-Disable (WRDI)
The Write-Disable (WRDI) instruction sets the Write-
Enable-Latch bit in the Status register to ‘0,’ preventing
Write operations. The WRDI instruction is ignored
during any internal write operations. Any Write opera-
tion started before executing WRDI will complete. Drive
CE# high before executing WRDI.
To execute a Write-Disable, the host drives CE# low,
sends the Write Disable command cycle (04H), then
drives CE# high. See Figures 5-34 and 5-35.
FIGURE 5-34: WRITE-DISABLE (WRDI) SEQUENCE (SQI)
FIGURE 5-35: WRITE-DISABLE (WRDI) SEQUENCE (SPI)
25119 F33.1
MODE 3 0 1
SCK
SIO(3:0)
CE#
04
MODE 0
CE#
SO
SI
SCK
01234567
04
HIGH IMPEDANCE
MODE 0
MODE 3
25119 F19.0
MSB