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Our device S70FS01GS will accept legacy single SPI commands even if the QUAD bit is set in configuration register. So, you can send the parameter data byte after WRAR command in single SPI mode. Also, it is mentioned in the datasheet that, the command sequence and behavior of WRAR command is similar to PP and 4PP command. You can refer waveform given for PP and 4PP commands on page 96, they are applicable for WRAR command also.
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