ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 197

• 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

28.2.2
28.2.3
2548E–AVR–07/06
Low Byte
Latching of Fuses
Table 28-4.
Notes:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are locked if
Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the Lock bits.
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
Fuse Low Byte
WDTON
EESAVE
BOOTSZ1
BOOTSZ0
BOOTRST
SUT1
SUT0
CKSEL
1. The default value of SUT1:0 results in maximum start-up time for the default clock source. See
2. The default value of BOOTSZ1:0 results in maximum Boot Size. See
3. See
4. When unpgrogrammed, Internal RC Oscillator is used. Programming this fuse is for test pur-
(3)
Table 7-2 on page 28
for details.
pose only, and should not be used in application.
Fuse Low Byte
”WDTCSR – Watchdog Timer Control Register” on page 47
Bit No
7
6
5
4
3
2
1
0
Description
Watchdog Timer always on
EEPROM memory is preserved
through the Chip Erase
Select Boot Size (see
page 193
Select Boot Size (see
page 193
Select Reset Vector
Select start-up time
Select start-up time
Clock Selection
for details.
for details)
for details)
Table 27-7 on
Table 27-7 on
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
Default Value
1 (unprogrammed, EEPROM
not preserved)
0 (programmed)
0 (programmed)
1 (unprogrammed)
for details.
ATmega406
Table 27-7 on page 193
(2)
(2)
(1)
(1)
(4)
197