AT90PWM2B-16SE ATMEL [ATMEL Corporation], AT90PWM2B-16SE Datasheet - Page 142
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AT90PWM2B-16SE
Manufacturer Part Number
AT90PWM2B-16SE
Description
8-bit Microcontroller with 8K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT90PWM2B-16SE.pdf
(361 pages)
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16.7.2
16.7.2.1
16.7.2.2
142
PSCOUTn1
PSCOUTn0
Period
AT90PWM2/3/2B/3B
Modes of Operation
DT0
Normal Mode
Enhanced Mode
OT0
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 ajust the dead time
between PSCOUTn0 and PSCOUTn1 active signals.
The waveform frequency is defined by the following equation:
The Enhanced Mode uses the previously described method to generate a high resolution
frequency.
Figure 16-13. Enhanced Mode, Timing Diagram
The supplementary step in counting to generate f
in the frame according to the fractional divider.
lated frame,” on page
The waveform frequency is defined by the following equations:
d is the fractionel divider factor.
T1
DT1
f
PSCn
=
141.
f2
OT1
----------------------------- -
PSCnCycle
f1
PSCn
PSCn
f
AVERAGE
1
=
=
----- -
T
1
DT0
2
----- -
T
1
1
=
=
=
=
------------------------------------------------------------------------------- -
(
----------------------------------------------------------------------
(
----- -
16
OT0
d
OT0
----------------------------------------------------------------------
(
OT0
×
f1
+
+
PSCn
+
OT1
OT1
f
SeeTable 16-5, “Distribution of fb2 in the modu-
OT0
CLK_PSCn
OT1
f
f
b2
CLK_PSCn
CLK_PSCn
+
+
is added on the PSCn0 signal while needed
+
16 d
-------------- -
+
DT0
16
DT0
–
DT0
T2
Figure
×
+
+
f2
+
DT1
DT1
DT1
PSCn
DT1
16-6.
)
+
)
1
=
)
OT1+1
=
1
4317J–AVR–08/10
DT0
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