AT90PWM1-16MU Atmel, AT90PWM1-16MU Datasheet - Page 136

• Manufacturer Part Number: AT90PWM1-16MU
• Description: IC AVR PWM 8KB FLASH 16MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM1-16MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 19
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.7.2
16.7.2.1
16.7.2.2
136
PSCOUTn1
PSCOUTn0
Period
AT90PWM1
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
=
135.
f2
OT1
----------------------------- -
PSCnCycle
f1
PSCn
PSCn
f
AVERAGE
1
=
=
----- -
T
1
DT0
2
----- -
T
1
1
=
=
=
=
------------------------------------------------------------------------------- -
(
----------------------------------------------------------------------
(
----- -
16
OT0
d
OT0
----------------------------------------------------------------------
(
OT0
×
f1
OT0+1
+
+
PSCn
+
OT1
OT1
f
CLK_PSCn
OT1
SeeTable 38, “Distribution of fb2 in the modu-
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
4378C–AVR–09/08
DT0