Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
1108
• SLEEP: Sleep Mode
After reset, the DAC is in normal mode. The voltage reference and the DAC core are off. For the first conversion, a start-up
time must be defined in the STARTUP field. Note that in this mode, start-up time is only required once, at startup.
• FASTWKUP: Fast Wake-up Mode
• REFRESH: Automatic Refresh Period
0: Disables the automatic refresh of the analog channels.
1: Enables the automatic refresh of the analog channels with a refresh period of 1024/MCK.
Other values are forbidden.
1: Enables the automatic refresh of the analog channels with a refresh period of 1024/MCK.
Other values are forbidden.
• USER_SEL: User Channel Selection
• TAG: Tag Selection Mode
• MAXS: Max Speed Mode
• STARTUP: Startup Time Selection
Value
Name
Description
0
DISABLED
Normal mode: the DAC core and reference voltage circuitry are kept ON between conversions.
1
ENABLED
Sleep mode: the DAC core and/or reference voltage circuitry are OFF between
conversions.
Value
Name
Description
0
STAMODE
Normal sleep mode:
the sleep mode is defined by the SLEEP bit. Voltage
reference is OFF between conversions.
1
FASTWAKEUP
Fast wake-up after sleep mode:
voltage reference is kept ON between
conversions; DAC core is OFF
Value
Name
Description
0
CHANNEL0
Channel 0
1
CHANNEL1
Channel 1
Value
Name
Description
0
DIS
Tag selection mode disabled. Using USER_SEL to select
the channel for the conversion.
1
EN
Tag selection mode enabled
Value
Name
Description
0
NORMAL
Normal mode
1
MAXIMUM
Maximum speed mode enabled
Value
Name
Description
0
0
0 periods of DACClock
1
8
8 periods of DACClock
2
16
16 periods of DACClock