47.6.1 SPI Control Enable Register

Note: Writing a zero to this bit will disable the standby peripheral, Writing a one to this bit will enable the peripheral to be put into to standby.

Note: Writing a zero to this bit will disable the peripheral, Writing a one to this bit will enable the peripheral.

Note:

1. Writing a one to the SWRST bit resets the state of the module and all the registers, also the hidden registers, in the module to their initial state. The only exception is the DBGSTOP bit, which will keep its value after a SWRST. The module will be disabled after the reset. When writing a one to SWRST, no other bits in the same register will be written, as SWRST will clear all the bits in the same register. After writing a one to SWRST, SWRST will read back one until the module and the registers are reset. Any register write access during the ongoing reset will be discarded and an error will be generated. Read access can be performed without error generated and must return reset value. Writing a one to SWRST will have priority above all other actions, will always happen immediately and never stall the bus.
2. Writing a ‘0’ to SWRST has no effect.
3. During a SWRST, access to registers/bits without SWRST are disallowed until the CTRLA.SWRST is cleared by hardware.