AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 170

• 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

13.20 Interrupt Handling
13.21 PSC Clock Sources
170
AT90PWM81
This signal can be selected between all falling or rising edge of PSCr0 or PSCr1 outputs.
List of interrupt sources:
PSCR must be able to generate high frequency with enhanced resolution.
The PSCR has two clock inputs:
Figure 13-31. Clock selection
PCLKSELr bit in PSCR Configuration register (PCNFr) is used to select the clock source.
PPREr1/0 bits in PSCR Control Register (PCTLr) are used to select the divide factor of the clock.
Table 13-7.
PCLKSELr
0
0
0
0
1
1
1
1
• Counter reload (end of On Time 1)
• PSCR Input event (active edge or at the beginning of level configured event)
• CLK PLL from the PLL
• CLK I/O
CLK
CLK
PLL
I/O
Output Clock versus Selection and Prescaler
PPREr1
0
0
1
1
0
0
1
1
PCLKSELr
1
0
CK
PPREr0
0
1
0
1
0
1
0
1
PRESCALER
CLK
CLKPSCr output
CLK I/O
CLK I/O / 4
CLK I/O / 32
CLK I/O / 256
CLK PLL
CLK PLL / 4
CLK PLL / 32
CLK PLL / 256
PSCr
PPREr1/0
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