AT90PWM81-16MF Atmel, AT90PWM81-16MF Datasheet - Page 229

• Manufacturer Part Number: AT90PWM81-16MF
• Description: IC MCU AVR 8K FLASH ISP 32QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16MF

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-MLF®, QFN
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.4.2
18.4.2.1
18.4.2.2
7734P–AVR–08/10
Digital to Analog Converter input Register – DACH and DACL
DALA = 0
DALA = 1
Table 18-1.
• Bit 2 – DALA: Digital to Analog Left Adjust
Set this bit to left adjust the DAC input data.
Clear it to right adjust the DAC input data.
The DALA bit affects the configuration of the DAC data registers. Changing this bit affects the DAC out-
put on the next DACH writing.
• Bit 1 – Reserved
.
• Bit 0 – DAEN: Digital to Analog Enable bit
Set this bit to enable the DAC,
Clear it to disable the DAC.
DACH and DACL registers contain the value to be converted into analog voltage.
Writing the DACL register forbid the update of the input value until DACH has not been written too. So
the normal way to write a 10-bit value in the DAC register is firstly to write DACL the DACH.
In order to work easily with only 8 bits, there is the possibility to left adjust the input value. Like this it is
sufficient to write DACH to update the DAC value.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
DATS2
1
1
1
1
DATS1
0
0
1
1
DAC Auto Trigger source selection (Continued)
7
-
DAC7
R/W
R/W
0
0
7
DAC9
DAC1
R/W
R/W
0
0
6
-
DAC6
R/W
R/W
0
0
6
DAC8
DAC0
R/W
R/W
0
0
DATS0
0
1
0
1
5
-
DAC5
R/W
R/W
0
0
5
DAC7
-
R/W
R/W
0
0
Description
Reserved
Reserved
Timer/Counter1 Overflow
Timer/Counter1 Capture Event
4
-
DAC4
R/W
R/W
0
0
4
DAC6
-
R/W
R/W
0
0
3
-
DAC3
R/W
R/W
0
0
3
DAC5
-
R/W
R/W
0
0
2
-
DAC2
R/W
R/W
0
0
2
DAC4
-
R/W
R/W
0
0
1
DAC9
DAC1
R/W
R/W
0
0
1
DAC3
-
R/W
R/W
0
0
AT90PWM81
0
DAC8
DAC0
R/W
R/W
0
0
0
DAC2
-
R/W
R/W
0
0
DACH
DACL
DACH
DACL
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