Datasheet

977
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
42.7.14 ADC Extended Mode Register
Name: ADC_EMR
Address: 0xF804C040
Access: Read-write
This register can only be written if the WPEN bit is cleared in “ADC Write Protect Mode Register” on page 981.
• CMPMODE: Comparison Mode
• CMPSEL: Comparison Selected Channel
If CMPALL = 0: CMPSEL indicates which channel has to be compared.
If CMPALL = 1: No effect.
• CMPALL: Compare All Channels
0 = Only channel indicated in CMPSEL field is compared.
1 = All channels are compared.
• CMPFILTER: Compare Event Filtering
Number of consecutive compare events necessary to raise the flag = CMPFILTER+1
When programmed to 0, the flag rises as soon as an event occurs.
• TAG: TAG of the ADC_LDCR register
0 = Sets CHNB to zero in ADC_LDCR.
1 = Appends the channel number to the conversion result in ADC_LDCR register.
31 30 29 28 27 26 25 24
–––––––TAG
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
– – CMPFILTER – – CMPALL –
76543210
CMPSEL – – CMPMODE
Value Name Description
0 LOW Generates an event when the converted data is lower than the low threshold of the window.
1 HIGH Generates an event when the converted data is higher than the high threshold of the window.
2 IN Generates an event when the converted data is in the comparison window.
3 OUT Generates an event when the converted data is out of the comparison window.