Datasheet

SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
818
35.14.18 HSMCI Write Protect Mode Register
Name: HSMCI_WPMR
Address: 0xFFF800E4 (0), 0xFFFD00E4 (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 794
• “HSMCI Data Timeout Register” on page 796
• “HSMCI SDCard/SDIO Register” on page 797
• “HSMCI Completion Signal Timeout Register” on page 802
• “HSMCI DMA Configuration Register” on page 816
• “HSMCI Configuration Register” on page 817
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