AT90PWM81-16SF Atmel, AT90PWM81-16SF Datasheet - Page 113
AT90PWM81-16SF
Manufacturer Part Number
AT90PWM81-16SF
Description
IC MCU AVR 8K FLASH ISP 20SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM81-16MN.pdf
(325 pages)
Specifications of AT90PWM81-16SF
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, PWM, WDT
Number Of I /o
16
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
20-SOIC (7.5mm Width)
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90PWM81-16SF
Manufacturer:
Atmel
Quantity:
2 428
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12.7.2.2
12.8
7734P–AVR–08/10
PSCOUTn1
PSCOUTn0
Period
PSC Inputs
DT0
Enhanced Mode
OT0
The waveform frequency is defined by the following equation:
The Enhanced Mode uses the previously described method to generate a high resolution frequency.
12-13
Figure 12-13. Enhanced Mode, Timing Diagram
The supplementary step in counting to generate f
frame according to the fractional divider.
page
The waveform frequency is defined by the following equations:
d is the fractional divider factor.
The FWM can be applied on different locations within the PSC output waveforms as defined per
12-15 on page 137
Part A or B of PSC has its own system to take into account one PSC n internal input. Each part A or B is
configured by the PSC n Input A/B Control Register (PFRCnA/B
figuration Register ((see Section “PSC 2 Configuration Register – PCNF2”, page 135)
The PSC input module A is shown on
112.
gives an example of FWM with PBFMn1:0 = 00.
T1
DT1
f
PSCn
f2
OT1
f1
PSCn
=
PSCn
f
AVERAGE
----------------------------- -
PSCnCycle
=
=
-----
T
DT0
1
1
2
Table 12-14
-----
T
1
1
=
=
SeeTable 12-6, “Distribution of fb2 in the modulated frame,” on
=
------------------------------------------------------------------------------
(
----- -
16
OT0
d
-------------------------------------------------------------------- -
(
=
OT0
×
f1
-------------------------------------------------------------------- -
(
+
OT0
PSCn
b2
+
OT1
OT0
OT1
is added on the PSCn0 signal while needed in the
f
f
+
CLK_PSCn
CLK_PSCn
+
+
OT1
16 d
-------------- -
f
+
CLK_PSCn
DT0
16
–
DT0
+
T2
×
+
DT0
f2
page
+
DT1
DT1
PSCn
DT1
+
140) and the PSC n Extended Con-
+
DT1
)
1
)
)
OT1+1
AT90PWM81
DT0
Figure
Table
113
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