AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 126

• Manufacturer Part Number: AT90PWM81
• Manufacturer: Atmel Corporation

Specifications of AT90PWM81

• Flash (kbytes): 8 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

12.17 PSC Input Mode 9: Fixed Frequency Edge Retrigger PSC
126
PSCOUTn0
PSCOUTn1
PSCn Input A
AT90PWM81
PSCn Input B
PSCOUTn0
PSCOUTn1
DT0
DT0
Figure 12-35. PSC behavior versus PSCn Input A in Mode 9
The output frequency is not modified by the occurrence of significative edge of retriggering input.
Only the output is deactivated when significative edge on retriggering input occurs.
Note: In this mode the output of the PSC becomes active during the next ramp even if the Retrigger/Fault
input is active. Only the significative edge of Retrigger/Fault input is taken into account.
Figure 12-36. PSC behavior versus PSCn Input B in Mode 9
The retrigger event is taken into account only if it occurs during the corresponding On-Time.
OT0
OT0
DT1
DT1
OT1
OT1
DT0
DT0
OT0
OT0
DT1
DT1
OT1
OT1
DT0
DT0
OT0
OT0
DT1
DT1
7734P–AVR–08/10
OT1
OT1