ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 40

• 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

9.2.1
40
ATmega406
Power-on Reset and Charger Connect
Figure 9-1.
To be able to start from power-off, a charger must be detected. In order to detect a charger, the
voltage at the BATT pin must rise above the Charger-on Threshold Voltage level,V
issue a Power- on Reset (POR), and the chip enters RESET mode. When the Delay Counter
times out, the chip will enter Active mode.
characteristics.
RESET
BATT
V
Reset Logic
REG
Pull-up Resistor
JTAG Reset
Register
FILTER
SPIKE
V
REG
Ultra Low Power
RC Oscillator
SUT[1:0]
Reset Circuit
Watchdog
Brown-out
Power-on
Detection
Generator
Charger
Circuit/
Detect
Timer
Reset
Clock
Table 30-3 on page 230
CK
POR
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
COUNTER RESET
TIMEOUT
shows the Power-on Reset
2548E–AVR–07/06
COT
. This will