RAM Automatic Low Power Mode

The RAM is by default put in low power mode (back-biased) if the device is in standby sleep mode.

This behavior can be changed by configuring the Back Bias bit in the Standby Configuration register (STDBYCFG.BBIASHS), refer to the table below for details.

Note: In standby sleep mode, the RAM is put in low-power mode by default. This means that the RAM is back-biased, and the DMAC cannot access it. The DMAC can only access the RAM when it is not back biased (PM.STDBYCFG.BBIASxx=0x0).
Table 1. RAM Back-Biasing Mode
STBYCDFG.BBIASHS RAM
0x0 No Back Biasing RAM is not back-biased if the device is in standby sleep mode.
0x1 Standby Back Biasing mode RAM is back-biased if the device is in standby sleep mode.
Parent topic: Advanced Features