AT90PWM161 Atmel Corporation, AT90PWM161 Datasheet - Page 112

• Manufacturer Part Number: AT90PWM161
• Manufacturer: Atmel Corporation

Specifications of AT90PWM161

• Flash (kbytes): 16 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 20
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 3
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 8
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

12.7.2
12.7.2.1
112
AT90PWM81
Modes of Operation
Normal Mode
Table 12-6.
While ‘X’ in the table, f
So for each row, a number of fb2 take place of fb1.
Figure 12-12. 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
1
PWM - cycle
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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
12-6.
9
X
X
X
X
X
X
10
X
X
X
X
X
X
X
X
X
X
X
X
11
f
12
X
X
X
X
X
X
X
X
X
X
X
X
b2
13
X
X
X
X
7734P–AVR–08/10
f
OP
14
X
X
X
X
X
X
X
X
15