ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 231

• Manufacturer Part Number: ATmega406
• Manufacturer: Atmel Corporation

Specifications of ATmega406

• Flash (kbytes): 40 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 1 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -30 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 2
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

30.6
30.6.0.1
2548E–AVR–07/06
Supply Current of I/O Modules
Example 1
Table 30-5 on page 231
and I
Power Reduction Register 0” on page 36
to calculate the additional current consumption for the different I/O modules in Active and Idle
mode.
Table 30-5.
Calculate the expected current consumption in idle mode with TIMER1, V-ADC and Battery Pro-
tection enabled at V
need to add 1.7% for the TIMER1, 1.9% for the V-ADC, and 25.2% for the TWI module. Reading
from
mA at V
TIMER1, and SPI enabled, gives:
I
CC
PRR0 bit
PRTWI
PRTIM1
PRTIM0
PRVADC
total
”DC Characteristics” on page
CC
≈
1.2mA
Idle for every I/O module controlled by the Power Reduction Register, see
CC
= 3.3V and F = 1MHz. The total current consumption in idle mode with USART0,
•
Additional Current Consumption for the different I/O modules
(
1
+
0.017
V
CC
Additional Current
CC
Consumption at
= 3.3V and F = 1MHz. From
= 3.3V, F = 1 MHZ
is showing the additional current consumption compared to I
+
0.019
[µA]
68.0
4.5
6.0
5.0
+
0.252
225, we find that the idle current consumption is typically 1.2
)
≈
for details. The tables and formulas below can be used
1.55mA
Consumption compared
to Active mode [%]
Additional Current
Table
5.6
0.4
0.5
4.2
30-5, fourth column, we see that we
Consumption compared
ATmega406
Additional Current
to Idle mode [%]
25.2
1.7
2.2
1.9
CC
”PRR0 –
Active
231