AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 115

• Manufacturer Part Number: AT90PWM81-16SN
• Description: IC MCU AVR 8K FLASH ISP 20SOIC
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16SN

• 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)
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Timers: 1
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• On-chip Dac: 10 bit, 1 Channel
• Height: 2.35 mm
• Length: 13 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 7.6 mm
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.8.1
12.8.2
7734P–AVR–08/10
PSC Retrigger Behavior versus PSC running modes
Retrigger PSCOUTn0 On External Event
Figure 12-15. PSC Input Module B
In centered mode, Retrigger Inputs have no effect.
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 PSC counting to zero.
PSCOUTn0 output can be reset before end of On-Time 0 on the change on PSCn Input A. PSCn Input A
can be configured to do not act or to act on level or edge modes. The polarity of PSCn Input A is configu-
rable thanks to a sense control block. PSCn Input A can be the Output of the analog comparator or the
PSCINn input.
As the period of the cycle decreases, the instantaneous frequency of the two outputs increases.
PSCINn
AC2 O: Analog
Comparator
Output
PSCINnA
AC3 O:Analog
Comparator
Output
PISELnB1
0
0
1
1
0
1
0
1
PISELnB0
PSC n Input B
PCAEnB
PELE VnB
PRFM nB3:0
Digital
Filter
CLK
PSC
PAO CnB
PFLTEnB
0
1
CLK
CLK
4
PSC
PSC
Input
Proces sing
(retriggering ...)
PSC C o re
(Counter,
Wav eform
Generator, ...)
Output
Control
AT90PWM81
PSCOUT n0
(PSCOUT n1)
(PSCOUT2
(PSCOUT2
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