System configuration controller (SYSCFG) RM0453
438/1461 RM0453 Rev 1
11.2.10 SYSCFG SRAM2 key register (SYSCFG_SKR)
Address offset: 0x024
Reset value: 0x0000 0000
Bit 19 P19WP: SRAM2 1 Kbyte page 19 write protection
Bit 18 P18WP: SRAM2 1 Kbyte page 18 write protection
Bit 17 P17WP: SRAM2 1 Kbyte page 17 write protection
Bit 16 P16WP: SRAM2 1 Kbyte page 16 write protection
Bit 15 P15WP: SRAM2 1 Kbyte page 15 write protection
Bit 14 P14WP: SRAM2 1 Kbyte page 14 write protection
Bit 13 P13WP: SRAM2 1 Kbyte page 13 write protection
Bit 12 P12WP: SRAM2 1 Kbyte page 12 write protection
Bit 11 P11WP: SRAM2 1 Kbyte page 11 write protection
Bit 10 P10WP: SRAM2 1 Kbyte page 10 write protection
Bit 9 P9WP: SRAM2 1 Kbyte page 9 write protection
Bit 8 P8WP: SRAM2 1 Kbyte page 8 write protection
Bit 7 P7WP: SRAM2 1 Kbyte page 7 write protection
Bit 6 P6WP: SRAM2 1 Kbyte page 6 write protection
Bit 5 P5WP: SRAM2 1 Kbyte page 5 write protection
Bit 4 P4WP: SRAM2 1 Kbyte page 4 write protection
Bit 3 P3WP: SRAM2 1 Kbyte page 3 write protection
Bit 2 P2WP: SRAM2 1 Kbyte page 2 write protection
Bit 1 P1WP: SRAM2 1 Kbyte page 1 write protection
Bit 0 P0WP: SRAM2 1 Kbyte page 0 write protection
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
Res. Res. Res. Res. Res. Res. Res. Res. KEY[7:0]
wwwwwwww
Bits 31:8 Reserved, must be kept at reset value.
Bits 7:0 KEY[7:0]: SRAM2 write protection key for software erase
The following steps are required to unlock the write protection of the SRAM2ER bit in the
SYSCFG_SCSR register.
1. Write 0xCA into Key[7:0].
2. Write 0x53 into Key[7:0].
Writing a wrong key reactivates the write protection.
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