Datasheet

787
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
38.12.12TWI Write Protection Mode Register
Name: TWI_WPROT_MODE
Address: 0xF80100E4 (0), 0xF80140E4 (1), 0xF80180E4 (2)
Access: Read-write
• SECURITY_CODE: Write protection mode security code
This security code is needed to set/reset the WPROT bit value (see Section 38.11 “Write Protection System” for details).
Must be filled with 0x545749 (ASCII code for TWI).
• WPROT: Write protection bit
Enables/Disables write protection mode.
The write protected registers are:
“TWI Clock Waveform Generator Register”
“TWI Slave Mode Register”
31 30 29 28 27 26 25 24
SECURITY_CODE
23 22 21 20 19 18 17 16
SECURITY_CODE
15 14 13 12 11 10 9 8
SECURITY_CODE
76543210
–––––––WPROT