AT90PWM81-16MN Atmel, AT90PWM81-16MN Datasheet - Page 156

• Manufacturer Part Number: AT90PWM81-16MN
• Description: IC MCU AVR 8K FLASH ISP 32QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16MN

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 20
• 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 11x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-MLF®, QFN
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.8.1
13.8.2
156
AT90PWM81
PSCR Retrigger Behavior versus PSCR running modes
Retrigger PSCOUTr0 On External Event
Figure 13-8.
In two ramp or four ramp mode, Retrigger Inputs A or B cause the end of the corresponding cycle A or B
and the beginning of the following cycle B or A.
In one ramp mode, Retrigger Inputs A or B reset the current PSCR counting to zero.
PSCOUTr0 output can be reset before end of On-Time 0 on the change on PSCr Input A. PSCr Input A
can be configured to do not act or to act on level or edge modes. The polarity of PSCr Input A is configu-
rable thanks to a sense control block. PSCr Input A can be the Output of the analog comparator or the
PSCINr input.
As the period of the cycle decreases, the instantaneous frequency of the two outputs increases.
PSCINr
AC1 O: Analog
Comparator
Output
PSCINrA
PSCINrB
PISELrA1
(PISELrB1)
0
0
1
1
PSCR Input Module
0
1
0
1
PISELrA0
(PISELrB0)
PSCR Input A
(PSCR Input B)
PELE V rA /
(PELE V rB )
PRFM rA3:0
(PRFM rB3:0)
PCAErA
(PCAErB)
Digital
Filter
CLK
PSC
PAO CrA
(PA OCrB)
PFLTErA
(PFLTErB)
0
1
CLK
CLK
2
4
PSC
PSC
Input
Processing
(retriggering ...)
PSC C o re
(Counter,
Waveform
Generator, ...)
Output
Control
PSCOUT r0
(PSCOUT r1)
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