AT90PWM3B Atmel Corporation, AT90PWM3B Datasheet - Page 138

• Manufacturer Part Number: AT90PWM3B
• Manufacturer: Atmel Corporation

Specifications of AT90PWM3B

• Flash (kbytes): 8 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 27
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 3
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 105
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 5
• Output Compare Channels: 16
• Input Capture Channels: 1
• Pwm Channels: 12
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

138
AT90PWM2/3/2B/3B
Figure 16-9. PSCn0 & PSCn1 Basic Waveforms in Center Aligned Mode
On-Time 0 = 2 * OCRnSAH/L * 1/Fclkpsc
On-Time 1 = 2 * (OCRnRBH/L - OCRnSBH/L + 1) * 1/Fclkpsc
Dead-Time = (OCRnSBH/L - OCRnSAH/L) * 1/Fclkpsc
PSC Cycle = 2 * (OCRnRBH/L + 1) * 1/Fclkpsc
Note:
OCRnRAH/L is not used to control PSC Output waveform timing. Nevertheless, it can be useful
to adjust ADC synchronization (
Figure 16-10. Run and Stop Mechanism in Centered Mode
Note:
OCRnRB
OCRnSB
OCRnSA
PSC Counter
Run
PSCOUTn0
(AT90PWM2/3)
PSCOUTn1
PSCOUTn1
(AT90PWM2B/3B)
Minimal value for PSC Cycle = 2 * 1/Fclkpsc
See “PSC 0 Control Register – PCTL0” on page
PSCOUTn0
PSCOUTn1
(AT90PWM2/3)
PSCOUTn1
(AT90PWM2B/3B)
OCRnRB
OCRnSB
OCRnSA
On-Time 1
PSC Counter
Dead-Time
See “Analog Synchronization” on page 157.
On-Time 0
PSC Cycle
0
0
164.(or PCTL1 or PCTL2)
Dead-Time
On-Time 1
).
4317J–AVR–08/10