Retentive Memory

Variables can be assigned the Data Type retain or retain-persistent and their values will be maintained if power is removed.

See the following for help- Retain Memory

Both variable types are stored in the Battery-backed SRAM memory.

  • Battery Backed SRAM: 1MB (RETAIN Data Type - 800KB, RETAIN-PERSISTENT Data Type - 200KB)


The retain-persistent variable values are NOT copied into Non-volatile Flash memory on a system power down and will be lost, if there is no battery or if the battery is in a low voltage state for an extended time period.