ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 5

• 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

2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
2.2.9
2548ES–AVR–07/06
Pin Descriptions
VFET
VCC
VREG
VREF
VREFGND
GND
SGND
Port A (PA7:PA0)
Port B (PB7:PB0)
High voltage supply pin. This pin is used as supply for the internal voltage regulator, described in
”Voltage Regulator” on page
tery protection circuit, for deep-under-voltage protection. For details, see
page
Digital supply voltage. Normally connected to VREG.
Output from the internal Voltage Regulator. Used for external decoupling to ensure stable regu-
lator operation. For details, see
Internal Voltage Reference for external decoupling. For details, see
Temperature Sensor” on page
Ground for decoupling of Internal Voltage Reference. For details, see
Temperature Sensor” on page
Ground
Signal ground pin, used as reference for Voltage-ADC conversions. For details, see
ADC – 10-channel General Purpose 12-bit Sigma-Delta ADC” on page
PA3:PA0 serves as the analog inputs to the Voltage A/D Converter.
Port A also serves as a low-voltage 8-bit bi-directional I/O port with internal pull-up resistors
(selected for each bit). As inputs, Port A pins that are externally pulled low will source current if
the pull-up resistors are activated. The Port A pins are tri-stated when a reset condition becomes
active, even if the clock is not running.
Port A also serves the functions of various special features of the ATmega406 as listed in
nate Functions of Port A” on page
Port B is a low-voltage 8-bit bi-directional I/O port with internal pull-up resistors (selected for
each bit). As inputs, Port B pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port B pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port B also serves the functions of various special features of the ATmega406 as listed in
nate Functions of Port B” on page
125.
114. In addition the voltage level on this pin is monitored by the bat-
121.
121.
”Voltage Regulator” on page
68.
70.
114.
”Voltage Reference and
116.
”Voltage Reference and
”Battery Protection” on
ATmega406
”Voltage
”Alter-
”Alter-
5