AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 166

• 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

13.16 PSCR Input Mode 8: Edge Retrigger PSC
166
AT90PWM81
PSCOUTn0
PSCOUTn1
PSCn Input B
PSCn Input B
PSCOUTn0
PSCOUTn1
PSCn Input A
or
DT0
Figure 13-25. PSCR behavior versus PSCr Input A in Mode 8
The output frequency is modulated by the occurrence of significative edge of retriggering input.
Figure 13-26. PSCR behavior versus PSCr Input B in Mode 8
The output frequency is modulated by the occurrence of significative edge of retriggering input.
The retrigger event is taken into account only if it occurs during the corresponding On-Time.
Note: In one ramp mode, the retrigger event on input A resets the whole ramp. So the PSCR doesn’t jump
to the opposite dead-time.
DT0
OT0
OT0
DT1
DT1
OT1
OT1
DT0
DT0 OT0
OT0
DT1
DT1
OT1
OT1
DT0
DT0
OT0
OT0
DT1
DT1
OT1
OT1
7734P–AVR–08/10