ATmega16M1 Atmel Corporation, ATmega16M1 Datasheet - Page 253

• Manufacturer Part Number: ATmega16M1
• Manufacturer: Atmel Corporation

Specifications of ATmega16M1

• Flash (kbytes): 16 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 27
• Ext Interrupts: 27
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Can: 1
• Lin: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 14
• Input Capture Channels: 1
• Pwm Channels: 10
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

22.2.2
22.2.3
22.3
22.3.1
8209D–AVR–11/10
Register Description
Voltage Reference for External Devices
Threshold Reference for Internal Analog Comparator
ADCSRB – ADC Control and Status Register B
An external resistor used in conjunction with the Current Source can be used as voltage refer-
ence for external devices. Using a resistor in serie with a lower tolerance than the Current
Source accuracy (≤2%) is recommended.
references using standard values of resistors.
An external resistor used in conjunction with the Current Source can be used as threshold refer-
ence for internal Analog Comparator (see
connected to AIN0 (negative Analog Compare input pin) as well as AIN1 (positive Analog Com-
pare input pin). Using a resistor in serie with a lower tolerance than the Current Source accuracy
(≤2%) is recommended.
using standard values of resistors.
Bit
Read/Write
Initial Value
• Bit 6 – ISRCEN: Current Source Enable
Set this bit to source a 100µA current to the AREF pin.
Clear this bit to disconnect.
• Bit 5 – AREFEN: Analog Reference pin Enable
Set this bit to connect the internal AREF circuit to the AREF pin.
Clear this bit to disconnect the internal AREF circuit from the AREF pin.
ADHSM
R/W
7
0
ISRCEN
R/W
Table 22-2 on page 252
6
0
AREFEN
R/W
5
0
“AC – Analog Comparator” on page
Table 22-2 on page 252
R
4
0
-
ATmega16M1/32M1/64M1
ADTS3
gives an example of threshold references
R/W
3
0
ADTS2
R/W
2
0
gives an example of voltage
ADTS1
R/W
1
0
254). This can be
ADTS0
R/W
0
0
ADCSRB
253