5.52 Release From Power-Down (RPD)

The Release From Power-Down (RPD) and Read ID instruction is a multi-purpose instruction that can be used either to exit Power-Down mode or to read the Device ID. To exit Power-Down mode, the host drives CE# low, issues the RPD command (ABH) in SPI or QPI mode, and then drives CE# high. The device returns to Standby mode and is ready to accept the next instruction after the T_SBR1 interval.

To read the Device ID, the host drives CE# low, issues the RDPD command (ABH) in SPI or QPI mode, transmits three dummy bytes, and then reads the Device ID before driving CE# high. The device outputs the Device ID (17H) on the falling edge of the SCK signal following the dummy bytes. The data output stream continues until terminated by a low-to-high transition on CE#. The device then returns to Standby mode and is ready for the next instruction after the specified T_SBR2 interval. See Figure 5-49 and Figure 5-50 for the command sequences.