ATmega64C1 Automotive Atmel Corporation, ATmega64C1 Automotive Datasheet - Page 276

• 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

22.4
22.4.1
22.4.2
22.4.3
276
Analog Peripheral Clock Sources
Atmel ATmega16/32/64/M1/C1
ADC Clock
Comparator Clock
Amplifier Clock
Figure 22-2. Amplifier, Comparator and ADC
The ADC clock comes from the clock system (CLKio) and it is divided by the ADC Prescaler.
See “ADC Prescaler Selection” on page 247. The bits described in the ADC Prescaler Selec-
tion determine the division factor between the system clock frequency and input clock of the
ADC.
See “Prescaling and Conversion Timing” on page 233. for a complete description of the ADC
clock system.
While it is not connected to an amplifier, a comparator is clocked by the comparator clock
which is configured thanks to the ACCKSEL bit in AC0CON register
0 Control Register – AC0CON” on page 264.
and the CLKio.
When it is connected to an amplifier, a comparator is clock by twice the amplifier clock.
When the Amplifier uses the ADC clock, this clock is divided by 8. This insures a maximum
frequency of 250kHz for the amplifier when the ADC clock is 2MHz. When the ADC is clocked
with a frequency higher than 2MHz the amplifier cannot be clocked by the ADC clock.
See “Amplifier” on page 250. for a complete description of the Amplifier clock system.
ACMPx
AMPx+
AMPx-
AMPCMPx
Amplifier
Clock
+
-
AMPx
ADC Multiplexer
One can select between the 16MHz PLL output
Analog Comparator
Negative Input
ADC
Sampling
& Hold
Comparator
Clock
+
-
ACxEN
See “Analog Comparator
Analog Comparator
Output
7647G–AVR–09/11