ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 118
ATmega406
Manufacturer Part Number
ATmega406
Description
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATmega406-1AAU
Manufacturer:
AT
Quantity:
20 000
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20.3
20.3.1
20.3.2
118
Register Description
ATmega406
VADMUX – V-ADC Multiplexer Selection Register
VADCSR – V-ADC Control and Status Register
ADC Conversion Complete Interrupt Flag – VADCCIF is set. One 12-bit conversion takes 519 µs
to complete from the start bit is set to the interrupt flag is set. To ensure that correct data is read,
both high and low byte data registers should be read before starting a new conversion.
• Bit 7:4 – RES: Reserved Bits
These bits are reserved bits in the ATmega406 and will always read as zero.
• Bit 3:0 – VADMUX3:0: V-ADC Channel Selection Bits
The VADMUX bits determine the V-ADC channel selection. See
Table 20-1.
• Bit 7:4 – RES: Reserved Bits
These bits are reserved bits in the ATmega406 and will always read as zero.
• Bit 3 – VADEN: V-ADC Enable
Writing this bit to one enables V-ADC conversion. By writing it to zero, the V-ADC is turned off.
Turning the V-ADC off while a conversion is in progress will terminate this conversion. Note that
the bandgap voltage reference must be enabled separately, see “BGCCR – Bandgap Calibra-
tion C Register” on page 123.
Bit
(0x7C)
Read/Write
Initial Value
Bit
(0x7A)
Read/Write
Initial Value
VADMUX3:0
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
VADMUX channel selection
R
7
–
0
R
7
0
–
R
6
–
0
R
6
0
–
R
5
–
0
R
5
0
–
Channel Selected
CELL 1
CELL 2
CELL 3
CELL 4
ADC4
VTEMP
ADC0
ADC1
ADC2
ADC3
R
R
4
–
0
4
–
0
VADMUX3
VADEN
R/W
R/W
3
0
3
0
VADMUX2
VADSC
R/W
R/W
2
0
2
0
Table 20-1 on page
Scale
0.2
0.2
0.2
0.2
0.2
1.0
1.0
1.0
1.0
1.0
VADMUX1
VADCCIF
R/W
R/W
1
0
1
0
VADMUX0
VADCCIE
R/W
R/W
0
0
0
0
2548E–AVR–07/06
118.
VADMUX
VADCSR
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