Datasheet

670
SAM9G25 [DATASHEET]
11032D–ATARM–10-Mar-2014
34.14.18 HSMCI Write Protect Mode Register
Name: HSMCI_WPMR
Address: 0xF00080E4 (0), 0xF000C0E4 (1)
Access: Read-write
• WP_EN: Write Protection Enable
0 = Disables the Write Protection if WP_KEY corresponds to 0x4D4349 (“MCI’ in ASCII).
1 = Enables the Write Protection if WP_KEY corresponds to 0x4D4349 (“MCI’ in ASCII).
• WP_KEY: Write Protection Key password
Should be written at value 0x4D4349 (ASCII code for “MCI”). Writing any other value in this field has no effect.
Protects the registers:
• “HSMCI Mode Register” on page 647
• “HSMCI Data Timeout Register” on page 649
• “HSMCI SDCard/SDIO Register” on page 650
• “HSMCI Completion Signal Timeout Register” on page 655
• “HSMCI DMA Configuration Register” on page 668
• “HSMCI Configuration Register” on page 669
31 30 29 28 27 26 25 24
WP_KEY (0x4D => “M”)
23 22 21 20 19 18 17 16
WP_KEY (0x43 => C”)
15 14 13 12 11 10 9 8
WP_KEY (0x49 => “I”)
76543210
WP_EN