ATmega16HVA Atmel Corporation, ATmega16HVA Datasheet - Page 106

• Manufacturer Part Number: ATmega16HVA
• Manufacturer: Atmel Corporation

Specifications of ATmega16HVA

• Flash (kbytes): 16 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

Figure 19-3. Accumulation Current Conversions
19.4
Figure 19-4. Regular Current Detection Mode (CADSE=1)
106
Enable
Accumulation
Interrupt
Accumulation
Data
Read byte 1
Read byte 2
Read byte 3
Read byte 4
Regular Current
Detection Operation
Regular Current
Detection Interupt
Regular Discharge
Current Threshold
Regular Charge
Current Threshold
Regular Current Detection Operation
ATmega8HVA/16HVA
Current through R
By setting the CADSE bit in CADCSRA the CC-ADC will enter a special Regular Current Detec-
tion Sampling Mode.
In this mode the CC-ADC will do one Instantaneous Current Conversion on regular sampling
intervals while updating of the Accumulation Current Register is automatically disabled. The
sampling interval is controlled by writing to the CADSI bits in CADCSRA.
Each time a conversion is completed the result is compared with Regular Charge/Discharge
Threshold levels specified in the CADRC register. If interrupt is enabled and the voltage is
above/below the specified limit a Regular Current Detection Interrupt will be issued.
illustrates the Regular Current Detection Mode
The Regular Current Detection has a separate Interrupt and by setting the CADRCIE bit, this
interrupt is enabled. Note that this Regular Current Detection interrupt cannot wake-up the CPU
from sleep mode. To be able to use the Regular Current Detection function in sleep modes, the
~250, 500, 1000, 2000ms
Turn-off
1, 2, 3, or 4s settling
INVALID DATA
SENSE
Measure
~12ms
125, 250, 500,
or 1000 ms
DATA 1
~250, 500, 1000, 2000ms
125, 250, 500,
or 1000 ms
DATA 2
Turn-off
1000, or 2000 ms
250, 500,
DATA 3
Measure
~12ms
8024A–AVR–04/08
Figure 19-4
DATA 4