AT90PWM1 Atmel Corporation, AT90PWM1 Datasheet - Page 152

• Manufacturer Part Number: AT90PWM1
• Manufacturer: Atmel Corporation

Specifications of AT90PWM1

• Flash (kbytes): 8 Kbytes
• Pin Count: 24
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 19
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 2
• Resistive Touch Screen: No
• 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: 4
• Output Compare Channels: 12
• Input Capture Channels: 1
• Pwm Channels: 7
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

16.20 Analog Synchronization
16.21 Interrupt Handling
16.22 PSC Synchronization
152
AT90PWM1
PSC generates a signal to synchronize the sample and hold; synchronisation is mandatory for
measurements.
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
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
4378C–AVR–09/08