Datasheet

42023E–SAM–07/2013

ATSAM4L8/L4/L2

30.9.15 Write Protect Mode Register

Name:

WPMR

Access Type: Read/write

Offset: 0xE4

Reset Value: 0x00000000

• WPKEY: Write Protect Key

Valid key is “TIM” in ASCII (0x54494D in hexadecimal).

• WPEN: Write Protect Enable

1: Writing a one to this bit will enable write protection (WPKEY must be set).

0: Writing a zero to this bit will disable write protection (WPKEY must be set).

Protected registers:

Channel Mode Register: Capture Mode

Channel Mode Register: Waveform Mode

Stepper Motor Mode Register

Block Mode Register

31 30 29 28 27 26 25 24

WPKEY

23 22 21 20 19 18 17 16

WPKEY

15 14 13 12 11 10 9 8

WPKEY

76543210

-------WPEN