ATmega16M1 Automotive Atmel Corporation, ATmega16M1 Automotive Datasheet - Page 271

• Manufacturer Part Number: ATmega16M1 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega16M1 Automotive

• 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 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: 14
• Input Capture Channels: 1
• Pwm Channels: 10
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

21.2
21.3
7647G–AVR–09/11
Operation
Starting a Conversion
Figure 21-1. Digital to Analog Converter Block Schematic
The Digital to Analog Converter generates an analog signal proportional to the value of the
DAC registers value.
In order to have an accurate sampling frequency control, there is the possibility to update the
DAC input values through different trigger events.
The DAC is configured thanks to the DACON register. As soon as the DAEN bit in DACON
register is set, the DAC converts the value present on the DACH and DACL registers in accor-
dance with the register DACON setting.
Alternatively, a conversion can be triggered automatically by various sources. Auto Triggering
is enabled by setting the DAC Auto Trigger Enable bit, DAATE in DACON. The trigger source
is selected by setting the DAC Trigger Select bits, DATS in DACON (See description of the
DATS bits for a list of the trigger sources). When a positive edge occurs on the selected trigger
signal, the DAC converts the value present on the DACH and DACL registers in accordance
with the register DACON setting. This provides a method of starting conversions at fixed
intervals.
Detector
Edge
DAATE
DAC High bits
VRef
DACH
DATS2
10
DATS1
Atmel ATmega16/32/64/M1/C1
Update DAC
1
Trigger
DAC
10
0
DATS0
10
DACON
DACL
DAC Low bits
-
Result
DAC
DALA
Output
Driver
DAOE
DAEN
D2A pin
271