AT90PWM1 Atmel Corporation, AT90PWM1 Datasheet - Page 160

• 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

16.25.11 PSC 1 Control Register – PCTL1
16.25.12 PSC 2 Control Register – PCTL2
160
AT90PWM1
• Bit 2 – PARUN1 : PSC 1 Autorun
When this bit is set, the PSC 1 starts with PSC0. That means that PSC 1 starts :
•
•
Thanks to this bit, 2 or 3 PSCs can be synchronized (motor control for example.
• Bit 7:6 – PPRE21:0 : PSC 2 Prescaler Select
This two bits select the PSC input clock division factor.All generated waveform will be modified
by this factor.
Table 48. PSC 2 Prescaler Selection
• Bit 5 – PBFM2 : Balance Flank Width Modulation
When this bit is clear, Flank Width Modulation operates on On-Time 1 only.
When this bit is set, Flank Width Modulation operates on On-Time 0 and On-Time 1.
• Bit 4 – PAOC2B : PSC 2 Asynchronous Output Control B
When this bit is set, Fault input selected to block B can act directly to PSCOUT21 and
PSCOUT23 outputs. See Section “PSC Clock Sources”, page 153.
• Bit 3 – PAOC2A : PSC 2 Asynchronous Output Control A
When this bit is set, Fault input selected to block A can act directly to PSCOUT20 and
PSCOUT22 outputs. See Section “PSC Clock Sources”, page 153.
• Bit 2 – PARUN2 : PSC 2 Autorun
When this bit is set, the PSC 2 starts with PSC1. That means that PSC 2 starts :
•
•
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
PPRE21
0
0
1
1
when PRUN0 bit in PCTL0 register is set,
or when PARUN0 bit in PCTL0 is set and PRUN2 bit in PCTL2 register is set.
when PRUN1 bit in PCTL1 register is set,
or when PARUN1 bit in PCTL1 is set and PRUN0 bit in PCTL0 register is set.
PPRE20
0
1
0
1
PPRE21
R/W
7
0
PPRE20
R/W
6
0
Description
No divider on PSC input clock
Divide the PSC input clock by 4
Divide the PSC input clock by 16
Divide the PSC clock by 64
PBFM2
R/W
5
0
PAOC2B
R/W
4
0
PAOC2A
R/W
3
0
PARUN1
PARUN2
R/W
R/W
2
0
2
0
PCCYC2
R/W
1
0
PRUN2
R/W
0
0
4378C–AVR–09/08
PCTL2