System States and their Names

Follow the naming convention shown below when implementing the power management function to T-Engine.

Name: P0
State: Main power OFF

Name: P1
State: Main power ON, CPU sleep (startup by interruption available), no memory retained, peripheral modules optional

Name: P2
State: Main power ON, CPU sleep (startup by interruption available), memory retained, peripheral modules optional

Name: P3
State: Main power ON, CPU activated, memory retained, peripheral modules optional

More detailed naming convention shall be specified when CPU of P3 is activated.

The lowest clock frequency that the CPU can set shall be “1” and the highest frequency shall be the maximum value.

Example

  • Low speed: P3-1
  • Middle speed: P3-2
  • High speed: P3-3

  • Comments