AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 174

• Manufacturer Part Number: AT90PWM81
• Manufacturer: Atmel Corporation

Specifications of AT90PWM81

• Flash (kbytes): 8 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 20
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 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: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 8
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

13.23.7
174
AT90PWM81
PSCR Control Register – PCTL0
Table 13-11.
• Bit 2 – POP0: PSCR Output Polarity
If this bit is cleared, the PSCR outputs are active Low.
If this bit is set, the PSCR outputs are active High.
• Bit 1 – PCLKSEL0: PSCR Input Clock Select
This bit is used to select between CLKPF or CLKPS clocks.
Set this bit to select the fast clock input (CLKPF).
Clear this bit to select the slow clock input (CLKPS).
• Bit 0 – Reserved
• Bit 7:6 – PPRE01:0 : PSCR Prescaler Select
This two bits select the PSCR input clock division factor. All generated waveform will be modified by this
factor.
Table 13-12.
Bit
Read/Write
Initial Value
PMODE01
0
0
1
1
PPRE01
0
0
1
1
7
PPRE01
R/W
0
PSCR Mode Selection
PSCR Prescaler Selection
PPRE00
0
1
0
1
PMODE00
0
1
0
1
6
PPRE00
R/W
0
Description
No divider on PSCR input clock
Divide the PSCR input clock by 4
Divide the PSCR input clock by 32
Divide the PSCR clock by 256
5
PBFM01
R/W
0
One Ramp Mode
Two Ramp Mode
Four Ramp Mode
Reserved
Description
4
PAOC0B
R/W
0
3
PAOC0A
0
R/W
2
PBFM00
R/W
0
1
PCCYC0
R/W
0
0
PRUN0
R/W
0
7734P–AVR–08/10
PCTL0