AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 130

• 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

12.20 Analog Synchronization
12.21 Interrupt Handling
130
AT90PWM81
PSC generates a signal to synchronize the sample and hold or the ADC start; synchronization is manda-
tory for measurements.
This signal can be selected between all falling or rising edge of PSCn0 or PSCn1 outputs as defined per
Table 12-11 on page 133
The signal can be shifted by a digital delay defined by the register PASDLY. The shifting clock can be
either Clkpsc or Clkpsc/4, as described per Bit 7, 6, 5– PASDLKn(2:0): Analog Synchronization Output
Delay or Input Blanking select .
Figure 12-40. Analog synchronization
As each PSC can be dedicated for one function, each PSC has its own interrupt system (vector ...)
List of interrupt sources:
• Counter reload (end of On Time 1)
• End of Enhanced Cycle
• PSC Input event (active edge or at the beginning of level configured event)
• PSC Mutual Synchronization Error
CLKPSCn/8
CLKPSCn/4
CLKPSCn/2
CLKPSCn
PASDLKn(2:0)
7
6
5
4
and
Table 12-12 on page
OCRnSA
match
OCRnRA
match
A Trig/Fault
Digital
Delay
PASDLYn
OCRnSB
match
134.
OCRnRB
match
B Trig/Fault
PASDLKn(2)
PSYNCn(1:0)
1
0
PSCnASY
7734P–AVR–08/10