AT90PWM1 Atmel Corporation, AT90PWM1 Datasheet - Page 256

• 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

24.2.2.1
24.2.2.2
256
AT90PWM1
Example 1
Example 2
Calculate the expected current consumption in idle mode with a 8 MHz Xtal oscillator feeding the
PLL to generate a 16 MHz clock further divided by 16 using the CLKPR at V
tem clock is thus 1 MHz. Peripherals and I/O are not active.
Reading from
0.7 mA and the prescaler will need 16*30= 0.48 mA as it is clocked at 16 MHz.
Reading from
V
The total current consumption in idle mode with the XTAL and the PLL gives:
Calculate the expected current consumption in active mode with a 4 MHz Xtal oscillator clock
further divided by 8 using the CLKPR at V
erals and I/O are not active.
Reading from
need 4*50= 0.2 mA as it is clocked at 4MHz.
Reading from
V
The total typical current consumption in active mode with the 4MHz XTAL gives:
CC
CC
= 3.0V and F = 1MHz.
=5.0V and F = 0.5MHz.
I
CC
total
I
CC
≈
0.125
total
Table
Table
Figure
Figure
≈
0.06
+
0.7
24-3, we find that the Xtal oscillator current is 0.06 mA and the prescaler will
24-3, we find that the Xtal oscillator current is 0.125 mA, the PLL current is
24-5, we find that the idle current consumption of the core is ~0,17mA at
+
24-1, we find that the idle current consumption of the core is ~0,6 mA at
+
0.2
0.48
+
0.6
+
0.17
≈
0.86mA
≈
1.475mA
CC
= 5.0V. The system clock is thus 0.5 MHz. Periph-
CC
= 3.0V. The sys-
4378C–AVR–09/08