AT90PWM316-16SUR Atmel, AT90PWM316-16SUR Datasheet - Page 261
![MCU AVR 16K FLASH 16MHZ 32-SOIC](/photos/7/29/72992/313-32-soic_sml.jpg)
AT90PWM316-16SUR
Manufacturer Part Number
AT90PWM316-16SUR
Description
MCU AVR 16K FLASH 16MHZ 32-SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM216-16SU.pdf
(359 pages)
Specifications of AT90PWM316-16SUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
27
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K 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-SOIC (7.5mm Width)
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOICATAVRMC200 - KIT EVAL FOR AT90PWM3 ASYNCATAVRFBKIT - KIT DEMO BALLAST FOR AT90PWM2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
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22.3.1
22.4
22.4.1
7710E–AVR–08/10
DAC Register Description
DAC Voltage Reference
Digital to Analog Conversion Control Register – DACON
Note that an interrupt flag will be set even if the specific interrupt is disabled or the Global Inter-
rupt Enable bit in SREG is cleared. A conversion can thus be triggered without causing an
interrupt. However, the interrupt flag must be cleared in order to trigger a new conversion at the
next interrupt event.
The reference voltage for the ADC (V
be selected as either AV
AV
ated from the internal bandgap reference (V
external AREF pin is directly connected to the DAC, and the reference voltage can be made
more immune to noise by connecting a capacitor between the AREF pin and ground. V
also be measured at the AREF pin with a high impedant voltmeter. Note that V
impedant source, and only a capacitive load should be connected in a system.
If the user has a fixed voltage source connected to the AREF pin, the user may not use the other
reference voltage options in the application, as they will be shorted to the external voltage. If no
external voltage is applied to the AREF pin, the user may switch between AV
reference selection. The first DAC conversion result after switching reference voltage source
may be inaccurate, and the user is advised to discard this result.
The DAC is controlled via three dedicated registers:
• Bit 7 – DAATE: DAC Auto Trigger Enable bit
Set this bit to update the DAC input value on the positive edge of the trigger signal selected with
the DACTS2-0 bit in DACON register.
Clear it to automatically update the DAC input when a value is written on DACH register.
• Bit 6:4 – DATS2, DATS1, DATS0: DAC Trigger Selection bits
These bits are only necessary in case the DAC works in auto trigger mode. It means if DAATE
bit is set.
Bit
Read/Write
Initial Value
• The DACON register which is used for DAC configuration
• DACH and DACL which are used to set the value to be converted.
CC
is connected to the DAC through a passive switch. The internal 2.56V reference is gener-
DAATE
R/W
7
0
CC
DATS2
R/W
6
0
, internal 2.56V reference, or external AREF pin.
DATS1
R/W
5
0
REF
) indicates the conversion range for the DAC. V
DATS0
R/W
BG
4
0
) through an internal amplifier. In either case, the
3
0
-
-
DALA
AT90PWM216/316
R/W
2
0
DAOE
R/W
1
0
DAEN
CC
R/W
0
0
and 2.56V as
REF
DACON
is a high
REF
REF
261
can
can
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