Datasheet

SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
946
Figure 39-12. Method 3 (UPDM=2 and PTRM=0)
Figure 39-13. Method 3 (UPDM=2 and PTRM=1 and PTRCS=0)
39.6.3 PWM Comparison Units
The PWM provides 8
independent comparison units able to compare a programmed value with the current value of
the channel 0 counter (which is the channel counter of all synchronous channels, Section 39.6.2.7 “Synchronous
Channels”). These comparisons are intended to generate pulses on the event lines (used to synchronize ADC, see
Section 39.6.4 “PWM Event Lines”), to generate software interrupts and to trigger PDC transfer requests for the
synchronous channels (see “Method 3: Automatic write of duty-cycle values and automatic trigger of the update”
on page 944).
CCNT0
CDTYUPD
0x20
0x40
0x60
UPRCNT
0x0
0x1
0x0
0x1
0x0
0x1
CDTY
UPRUPD 0x1
0x3
transfer request
WRDY
0x0
0x1
0x2
0x3
0x0
0x1
0x2
UPR
0x1
0x3
0x80
0xA0
0xB0
0x20
0x40
0x60
0x80
0xA0
CCNT0
CDTYUPD
0x20
0x40
0x60
UPRCNT
0x0
0x1
0x0
0x1
0x0
0x1
CDTY
UPRUPD 0x1
0x3
CMP0 match
transfer request
WRDY
0x0
0x1
0x2
0x3
0x0
0x1
0x2
UPR
0x1
0x3
0x80
0xA0
0xB0
0x20
0x40
0x60
0x80
0xA0