Datasheet

964
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
42.7.2 ADC Mode Register
Name: ADC_MR
Address: 0xF804C004
Access: Read-write
This register can only be written if the WPEN bit is cleared in “ADC Write Protect Mode Register” on page 981.
• LOWRES: Resolution
• SLEEP: Sleep Mode
•FWUP: Fast Wake Up
• PRESCAL: Prescaler Rate Selection
ADCClock = MCK / ( (PRESCAL+1) * 2 )
• STARTUP: Start Up Time
31 30 29 28 27 26 25 24
USEQ – – – TRACKTIM
23 22 21 20 19 18 17 16
–––– STARTUP
15 14 13 12 11 10 9 8
PRESCAL
76543210
–FWUPSLEEPLOWRES––––
Value Name Description
0 BITS_10 10-bit resolution
1 BITS_8 8-bit resolution
Value Name Description
0 NORMAL Normal Mode: The ADC Core and reference voltage circuitry are kept ON between conversions
1 SLEEP Sleep Mode: The ADC Core and reference voltage circuitry are OFF between conversions
Value Name Description
0 OFF Normal Sleep Mode: The sleep mode is defined by the SLEEP bit
1 ON Fast Wake Up Sleep Mode: The Voltage reference is ON between conversions and ADC Core is OFF
Value Name Description
0 SUT0 0 periods of ADCClock
1 SUT8 8 periods of ADCClock
2 SUT16 16 periods of ADCClock
3 SUT24 24 periods of ADCClock
4 SUT64 64 periods of ADCClock