AT90PWM1 Atmel Corporation, AT90PWM1 Datasheet - Page 255

• 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

24.2.1.3
24.2.2
4378C–AVR–09/08
Power consumption estimation with clock prescaling
Example 3
I
CC
= 3.0V and F = 1MHz. The total current consumption in idle mode with USART, TIMER1, and
SPI enabled, gives:
All I/O modules should be enabled. Calculate the expected current consumption in active mode
at V
to be ~ 7.0mA (from
we find the total current consumption:
Curves on
clock source and provides the power consumption of the microcontroller core at a given
frequency.
The total power consumption of the microcontroller comes from the clock tree shown on
7-1 on page
•
•
•
•
•
•
When using the clock prescaler CLKPR to reduce the frequency
on page
nant factor of the active and idle power consumption.
Typical power consumption of the oscillators is given on
Table 24-3.
I
CC
Block
Watch dog oscillator
XTAL Oscillator
RC Oscillator
PLL
Clock Prescaler
total
Oscillator
PLL if used
Clock prescaler
Core
Peripheral
I/O
total
CC
1.The PLL generates a 64 MHz clock for the PSC and a 16 MHz clock for the CPU.
2.N is the frequency (in MHz) at the input of the clock prescaler
≈
≈
7.0mA
= 3.6V and F = 10MHz. We find the active current consumption without the I/O modules
0.6mA
35.), the power consumption of the oscillators and the prescaler can became the domi-
Figure
27, thus it is the sum of the following terms:
•
•
(
Power consumption of the clock system
1
(
1
+
24-1,
+
0.1
0.156
Figure 24-2
+
0.1
Figure
+
+
0.085
0.1
24-2,
). Then, by using the numbers from
+
+
MHz
0.128
4
8
16
8
64/16
N
0.085
0.053
(2)
Figure 24-5
(1)
+
)
0.043
≈
0.77mA
+
0.053
and
Typical numbers µA
5
60
125
250
50
700
N*30
Figure 24-6
+
0.156
V
Table
CC
= 3V
+
0.105
24-3.
(See “System Clock Prescaler”
are measured with an external
Table 24-2
)
≈
12.2mA
5
60
125
250
50
700
N*50
AT90PWM1
- second column,
V
CC
= 5V
Figure
255