AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 114

• 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

114
AT90PWM81
According to PSC n Input A Control Register (see Section “PSC n Input A Control Register – PFRCnA”,
page 140), PSC n input A can act as a Retrigger or Fault input.
Each part A or B can be triggered by up to four signals as defined per
12-19 on page 139
Part A of PSC has also a blanking module allowing to cancel unwanted transitions which may appear on
the PSC n input A during a certain period of time.
The blanking start is defined by the bits PASDLKn(2:0) as per
The blanking duration is defined by the register PASDLYn. If the blanking is selected by the correspond-
ing PASDLKn(2:0) bit, all transitions which may appears from the blanking start until a time period are
ignored.
Blanking is level sensitive, i.e. a pulse started in the blanking window and still at active level after the
window will generate a valid retriggering event.
Figure 12-14. PSC Input Module A
PSC input module B is shown on
According to PSC n Input B Control Register (see Section “PSC n Input B Control Register – PFRCnB”,
page 140), PSC n input B can act as a Retrigger or Fault input.
PSC start c ycle
OCR SB
OSR SA
AC2 O: Analog
Comparator
Output
PSCINnA
AC3 O: Analog
Comparator
Output
PSCINn
PAS DLKn(2:0)
PISELnA1
3
2
1
0
0
1
1
0
1
PISELnA0
0
1
PSC n Input A
PELE VnA /
Blanking S tart
=0, 4..7
No Blanking
Input
Blanking
PAS DLY
Table 12-15
PRFM nA3:0
Digital
Filter
CLK
PCAEnA
PSC
PAO CnA
PFLTEnA
0
1
CLK
4
PSC
Table 12-14 on page
Input
Proces sing
(retriggering ...)
PSC C o re
(Counter,
Wav eform
Generator, ...)
Table 12-18 on page 138
Output
Control
136.
PSCOUT n0
(PSCOUT n1)
(PSCOUT2
(PSCOUT2
7734P–AVR–08/10
and
Table