Datasheet

738
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
37.7.9 PWM Channel Mode Register
Name: PWM_CMR[0..3]
Address: 0xF8034200 [0], 0xF8034220 [1], 0xF8034240 [2], 0xF8034260 [3]
Access: Read/Write
• CPRE: Channel Pre-scaler
Values which are not listed in the table must be considered as “reserved”.
• CALG: Channel Alignment
0 = The period is left aligned.
1 = The period is center aligned.
• CPOL: Channel Polarity
0 = The output waveform starts at a low level.
1 = The output waveform starts at a high level.
• CPD: Channel Update Period
0 = Writing to the PWM_CUPDx will modify the duty cycle at the next period start event.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
–––––CPDCPOLCALG
76543210
–––– CPRE
Value Name Description
0000 MCK Master Clock
0001 MCKDIV2 Master Clock divided by 2
0010 MCKDIV4 Master Clock divided by 4
0011 MCKDIV8 Master Clock divided by 8
0100 MCKDIV16 Master Clock divided by 16
0101 MCKDIV32 Master Clock divided by 32
0110 MCKDIV64 Master Clock divided by 64
0111 MCKDIV128 Master Clock divided by 128
1000 MCKDIV256 Master Clock divided by 256
1001 MCKDIV512 Master Clock divided by 512
1010 MCKDIV1024 Master Clock divided by 1024
1011 CLKA Clock A
1100 CLKB Clock B