Flash; Sram; Peripherals - Silicon Laboratories EFR32xG21 Wireless Gecko Reference Manual

4.2.2 Flash

The Flash retains data in any state and typically stores the application code and special user data. The Flash memory is typically pro-
grammed through the debug interface, but can also be erased and written to from software.
• Up to 1024 kB of memory
• Page size of 8 KB (minimum erase unit)
• Minimum 10k erase cycles endurance
• Greater than 10 years data retention at 85°C
• Lock registers for memory protection
• Data retention in any state

4.2.3 SRAM

The primary task of the SRAM memory is to store application data. Additionally, it is possible to execute instructions from SRAM, and
the DMA may be set up to transfer data between the SRAM, Flash and peripherals.
The device contains several blocks of SRAM for various purposes including general data memory (RAM) and various RF subsystem
rams (SEQRAM, FRCRAM). For more detailed information see
• Up to 96 kB of memory (RAM)
• RAM blocks may be powered down when not in use
• Data retention of the entire memory in EM2 to EM3

4.2.4 Peripherals

The peripherals are mapped into the peripheral memory segment, each with a fixed size address range shown in the
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4.2.4.1 Peripheral
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