BAT32G1x9 user manual | Chapter 21 Serial interface SPI
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21.3.1
Peripheral enable register 2 (PER2).
PER2 registers are registers that are set to allow or disable clocking to each peripheral hardware.
Reduce power consumption and noise by stopping clocking hardware that is not in use.
To use the SPI function, SPInEN must be set to "1".
For details, see "4.3.8 Perimeter Allow Registers 0, 1, 2, 3 (PER0, PER1, PER2, PER3)"
Note: n=0,1