ATmega64M1 Atmel Corporation, ATmega64M1 Datasheet - Page 240

• Manufacturer Part Number: ATmega64M1
• Manufacturer: Atmel Corporation

Specifications of ATmega64M1

• 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 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

240
ATmega16M1/32M1/64M1
Figure 21-17. Amplifier synchronization timing diagram
In order to have a better understanding of the functioning of the amplifier synchronization, a tim-
ing diagram example is shown
It is also possible to auto trigger conversion on the amplified channel. In this case, the conver-
sion is started at the next amplifier clock event following the last auto trigger event selected
thanks to the ADTS bits in the ADCSRB register. In auto trigger conversion, the free running
mode is not possible unless the ADSC bit in ADCSRA is set by soft after each conversion.
The block diagram of the two amplifiers is shown on
Block
ADC
PSC
(Sync Clock)
Si g nal to be
PS Cn_ASY
AMPLI_clk
measu red
CK ADC
Activity
ADSC
ADC
ADSC is set when the amplifier output is changing due to the amplifier clock
switch
Figure 21-15 on page
Sampling
ADC
Conv
ADC
ADC Result
Ready
Figure 21-18 on page
236.
Sampling
Aborted
ADC
241.
Sampling
ADC
8209D–AVR–11/10
Valid sample
Conv
ADC
ADC Result
Ready