AT90PWM1-16MU Atmel, AT90PWM1-16MU Datasheet - Page 130

• Manufacturer Part Number: AT90PWM1-16MU
• Description: IC AVR PWM 8KB FLASH 16MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM1-16MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 19
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.5.2.2
16.5.2.3
130
AT90PWM1
Two Ramp Mode
One Ramp Mode
PSCOUTn0 and PSCOUTn1 signals are defined by On-Time 0, Dead-Time 0, On-Time 1 and
Dead-Time 1 values with :
On-Time 0 = OCRnRAH/L * 1/Fclkpsc
On-Time 1 = OCRnRBH/L * 1/Fclkpsc
Dead-Time 0 = (OCRnSAH/L + 2) * 1/Fclkpsc
Dead-Time 1 = (OCRnSBH/L + 2) * 1/Fclkpsc
Note:
In Two Ramp mode, the whole cycle is divided in two moments
One moment for PSCn0 description with OT0 which gives the time of the whole moment
One moment for PSCn1 description with OT1 which gives the time of the whole moment
Figure 16-7. PSCn0 & PSCn1 Basic Waveforms in Two Ramp mode
PSCOUTn0 and PSCOUTn1 signals are defined by On-Time 0, Dead-Time 0, On-Time 1 and
Dead-Time 1 values with :
On-Time 0 = (OCRnRAH/L - OCRnSAH/L) * 1/Fclkpsc
On-Time 1 = (OCRnRBH/L - OCRnSBH/L) * 1/Fclkpsc
Dead-Time 0 = (OCRnSAH/L + 1) * 1/Fclkpsc
Dead-Time 1 = (OCRnSBH/L + 1) * 1/Fclkpsc
Note:
In One Ramp mode, PSCOUTn0 and PSCOUTn1 outputs can overlap each other.
PSC Counter
PSCOUTn0
PSCOUTn1
Minimal value for Dead-Time 0 and Dead-Time 1 = 2 * 1/Fclkpsc
Minimal value for Dead-Time 0 and Dead-Time 1 = 1/Fclkpsc
OCRnSA
0
Dead-Time 0
On-Time 0
PSC Cycle
OCRnRA
0
OCRnSB
Dead-Time 1
On-Time 1
OCRnRB
4378C–AVR–09/08