ATmega8HVA Atmel Corporation, ATmega8HVA Datasheet - Page 164

• Manufacturer Part Number: ATmega8HVA
• Manufacturer: Atmel Corporation

Specifications of ATmega8HVA

• Flash (kbytes): 8 Kbytes
• Pin Count: 28
• Max. Operating Frequency: 4 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 3
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -20 to 85
• I/o Supply Class: 1.8 to 9.0
• Operating Voltage (vcc): 1.8 to 9.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

Table 28-1.
Notes:
164
Symbol
R1
RT1/RT2
R
CREF
CREG
CVCC
CF1
R
R
RP
CP
RP*CP
R
R
Ci
(R
Rsense
S
CF
BATT
PI
NI
PI
/R
+R
DF
NI
1. This is the absolute minimum capacitance required to ensure stable operation of the voltage regulator.
)*Ci
ATmega8HVA/16HVA
Recommended values for external devices
Use
Pull-up resistor for thermistors
NTC Thermistor
Source impedance when using
PA1..PA0 as V-ADC inputs
VREF decoupling
VREG charge-storage capacitor
VCC decoupling capacitor
Fly capacitors
Cell-input LP-filter resistors
Cell-input LP-filter capacitors
Cell-input LP-filter time-constants
Current sense LP-filter resistors
Current sense LP-filter capacitor
Current sense LP-filter time-constant
Coulomb Counter sense resisotor
Parameter
R
R@25°C
B-constant
R
Worst-case Gain-error due to R
C
C
C
C
R
R
R
C
R
C
R
τ
τ
S
3000
1.1
0.01
0.01
Min
6.5
10
10
8
8
0
0
1
(1)
Typ
500
220
100
2.2
2.2
0.1
0.1
0.1
10
10
25
10
10
3
1
1
1
4000
1000
Max
100
500
0.5
0.4
12
12
22
22
20
7
2
8024A–AVR–04/08
Unit
N/A
mΩ
kΩ
kΩ
kΩ
µF
µF
µF
nF
kΩ
kΩ
µF
µF
µs
µs
%
Ω
Ω