at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 112

• Manufacturer Part Number: at90pwm81-16se
• Description: 8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
• Manufacturer: ATMEL Corporation

13.7.2
13.7.2.1
112
AT90PWM81
Modes of Operation
Normal Mode
Table 13-6.
While ‘X’ in the table, f
So for each row, a number of fb2 take place of fb1.
Figure 13-12. Resulting Frequency versus d.
The simplest mode of operation is the normal mode. See
The active time of PSCOUTn0 is given by the OT0 value. The active time of PSCOUTn1 is given by the
OT1 value. Both of them are 12 bit values. Thanks to DT0 & DT1 to adjust the dead time between
PSCOUTn0 and PSCOUTn1 active signals.
Distribution of fb2 in the modulated frame
Fraction
al
Divider
(d)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
d:
f
b1
0
PWM - cycle
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
Distribution of f
2
1
X
X
X
X
X
X
X
3
b2
2
X
X
X
X
X
X
X
X
X
X
X
prime to f
4
3
X
X
X
b2
5
in the modulated frame
b1
4
X
X
X
X
X
X
X
X
X
X
X
X
X
6
in cycle corresponding cycle.
7
5
X
X
X
X
X
8
6
X
X
X
X
X
X
X
X
X
9 10 11 12 13 14 15
7
X
Figure
8
X
X
X
X
X
X
X
X
X
X
X
X
X
X
13-6.
9
X
X
X
X
X
X
10
X
X
X
X
X
X
X
X
X
X
11
X
X
f
12
X
X
X
X
X
X
X
X
X
X
X
X
b2
13
X
X
X
X
f
7734M–AVR–03/10
OP
14
X
X
X
X
X
X
X
X
15