AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 114

• 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

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