ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 224

• 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

Note:
224
Symbol
R1
RT1
RT2
RT3
RT4
R
R
R
R
R
C
(R
R
RP
CP
RP*CP
RN
R
R
R
R
CREF
CREG1
CREG2
RP1
RP2
CRESET
S
nni
ppi
ni
pi
i
sense
df
cf
pf
pc
pi
(2)
-R
(1)
ni
)*C
1. The sense resistor should be adjusted to the current flow for the application.
2. The pre-charger resistor should be adjusted to the pre-charger curret flow for the application.
ATmega406
i
Table 29-1.
Use
Pull-up resistor for thermistors
NTC Thermistor
Source Impedance when
using PA0...4 as V-ADC inputs
Current protection LP-filter
resistor
Current sense LP-filter
resistors
Current sense LP-filter
capasitor
Current sense LP-filter time
constant
Current sense resistor
Cell input LP-filter resistor
Cell input LP-filter capacitor
Cell input LP-filter time
constant
Pull-up resistor
Pull-up resistors
Pre-charge resistor
VREF decoupling
VREG charge-storage
TWI Pull-up resistors
Recommended values for external devices
Parameter
R
R@25°C
B-constant
R
Worst Gain-error due to R
R
R
C
τ
R
τ
R
R
R
C
C
C
R
C
C
S
Min
3000
0.01
0.01
6.5
10
10
0
0
0
1
Typ
100
500
0.1
0.1
0.1
2.2
0.1
10
10
10
10
25
3
1
1
5
1
1
1
1
Max
4000
1000
TBD
500
100
2548E–AVR–07/06
0.4
0.5
20
22
7
2
unit
mΩ
MΩ
MΩ
kΩ
kΩ
kΩ
kΩ
µF
µF
kΩ
µF
µF
µF
µs
µs
%
Ω
Ω
Ω
K