SAM3SD8B Atmel Corporation, SAM3SD8B Datasheet - Page 937

• Manufacturer Part Number: SAM3SD8B
• Manufacturer: Atmel Corporation

35.7.30
Name:
Address:
Access:
• WPCMD: Write Protect Command
This command is performed only if the WPKEY value is correct.
0 = Disable the Write Protect SW of the register groups of which the bit WPRGx is at 1.
1 = Enable the Write Protect SW of the register groups of which the bit WPRGx is at 1.
2 = Enable the Write Protect HW of the register groups of which the bit WPRGx is at 1.
3 = No effect.
Note:
• WPRGx: Write Protect Register Group x
0 = The WPCMD command has no effect on the register group x.
1 = The WPCMD command is applied to the register group x.
• WPKEY: Write Protect Key
Should be written at value 0x50574D (“PWM” in ASCII). Writing any other value in this field aborts the write operation of the
WPCMD field. Always reads as 0.
List of register groups:
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
• Register group 0:
• Register group 1:
• Register group 2:
WPRG5
Moreover, to meet security requirements, in this mode of operation, the PIO lines associated with PWM can not be con-
figured through the PIO interface, not even by the PIO controller.
–
–
–
–
–
31
23
15
7
“PWM Clock Register” on page 908
“PWM Disable Register” on page 910
“PWM Sync Channels Mode Register” on page 916
“PWM Channel Mode Register” on page 944
“PWM Stepper Motor Mode Register” on page 936
Only a hardware reset of the PWM controller can disable the Write Protect HW.
PWM Write Protect Control Register
PWM_WPCR
0x400200E4
Write-only
WPRG4
30
22
14
6
WPRG3
29
21
13
5
WPRG2
28
20
12
4
WPKEY
WPKEY
WPKEY
WPRG1
27
19
11
3
WPRG0
26
18
10
2
SAM3S8/SD8
SAM3S8/SD8
25
17
9
1
WPCMD
24
16
8
0
937
937