AT90PWM3B Atmel Corporation, AT90PWM3B Datasheet - Page 158

• 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

16.21 Interrupt Handling
16.22 PSC Synchronization
158
AT90PWM2/3/2B/3B
This signal can be selected between all falling or rising edge of PSCn0 or PSCn1 outputs.
In center aligned mode, OCRnRAH/L is not used, so it can be used to specified the synchroniza-
tion of the ADC. It this case, it’s minimum value is 1.
As each PSC can be dedicated for one function, each PSC has its own interrupt system (vector
...)
List of interrupt sources:
•
•
•
2 or 3 PSC can be synchronized together. In this case, two waveform alignments are possible:
•
•
Figure 16-38. PSC Run Synchronization
If the PSCm has its PARUNn bit set, then it can start at the same time than PSCn-1.
PRUNn and PARUNn bits are located in PCTLn register.
on page 164. See “PSC 1 Control Register – PCTL1” on page 165. See “PSC 2 Control Register
– PCTL2” on page 166.
Counter reload (end of On Time 1)
PSC Input event (active edge or at the beginning of level configured event)
PSC Mutual Synchronization Error
The waveforms are center aligned in the Center Aligned mode if master and slaves are all
with the same PSC period (which is the natural use).
The waveforms are edge aligned in the 1, 2 or 4 ramp mode
PRUN0
PARUN0
PRUN1
PARUN1
PRUN2
PARUN2
SY0In
SY1In
SY2In
SY0Out
SY1Out
SY2Out
Run PSC0
Run PSC1
Run PSC2
See “PSC 0 Control Register – PCTL0”
PSC0
PSC1
PSC2
4317J–AVR–08/10