ATmega64C1 Automotive Atmel Corporation, ATmega64C1 Automotive Datasheet - Page 261

• Manufacturer Part Number: ATmega64C1 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega64C1 Automotive

• Flash (kbytes): 64 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): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 150
• 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: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

19.2.4
19.3
19.3.1
7647G–AVR–09/11
Control Register
Threshold Reference for Internal Analog Comparator
ADC Control and Status Register B– ADCSRB
An external resistor used in conjunction with the Current Source can be used as threshold ref-
erence for internal Analog Comparator
connected to AIN0 (negative Analog Compare input pin) as well as AIN1 (positive Analog
Compare input pin). Using a resistor in serie with a lower tolerance than the Current Source
accuracy ( 2%) is recommended.
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
6
0
AREFEN
R/W
Table 19-2
5
0
Atmel ATmega16/32/64/M1/C1
(See ”Analog Comparator” on page
R
4
0
-
gives an example of threshold references using
ADTS3
R/W
3
0
ADTS2
R/W
2
0
ADTS1
R/W
1
0
262.). This can be
ADTS0
R/W
0
0
ADCSRB
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