Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK 데이터 시트
제품 코드
ATSAM4L-XSTK
1002
42023E–SAM–07/2013
ATSAM4L8/L4/L2
Figure 38-3. Two DMA Tx transfers: With Window Mode Configuration
38.6.16
Zoom Mode
The Zoom mode allows to choose a part of a range of the reference voltage
(SEQCFG.ZOOMRANGE) and spread it from 0 to 4095 decimal. This particular mode of the
ADC uses GAIN in which the input range is shifted with a programmable voltage.
(SEQCFG.ZOOMRANGE) and spread it from 0 to 4095 decimal. This particular mode of the
ADC uses GAIN in which the input range is shifted with a programmable voltage.
The input voltage range is acording to a programmable voltage of Vdd and a range around this
voltage (SEQCFG.GAIN).
voltage (SEQCFG.GAIN).
38.6.17
Window Monitor
The window monitor monitors ADC results and make the ADCIFE behave as an analog compar-
ator. Configuration is done by writing appropriately the Window Configuration Register (WCFG)
and the Window Thresholds Register (WTH). When writing a one in the Monitor Filter Mode bit in
the WCFG register (WCFG.MFM) , conversions are filtered using its index in the sequence. Oth-
erwise, no filtering is applied, monitoring is performed on every conversion. Index is given by
writing the field Source in the WCFG register (WCFG.SRC). Supported modes are selected by
writing the Window Mode field in the WCFG register, refer to the
ator. Configuration is done by writing appropriately the Window Configuration Register (WCFG)
and the Window Thresholds Register (WTH). When writing a one in the Monitor Filter Mode bit in
the WCFG register (WCFG.MFM) , conversions are filtered using its index in the sequence. Oth-
erwise, no filtering is applied, monitoring is performed on every conversion. Index is given by
writing the field Source in the WCFG register (WCFG.SRC). Supported modes are selected by
writing the Window Mode field in the WCFG register, refer to the
below.
Thresholds are given by writing the Low Threshold (LT) and High Threshold (HT) in WTH. Note
that the significant WTH.LT and WT.HT bits are given by the precision selected in the
SEQCFG.RES field. That means that if you are in 8-bit mode, only the 8 lower bits will be
considered.
that the significant WTH.LT and WT.HT bits are given by the precision selected in the
SEQCFG.RES field. That means that if you are in 8-bit mode, only the 8 lower bits will be
considered.
MSB : 1
DMA Tx Ready
APB Data Bus
1st DMA Word Data
Start Of Conversion
31
30
29
28
27
26
25
24
1
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
TSS
RES
ENSTUP
7
6
5
4
3
2
1
0
GCOMP
STRIG
BIPOLAR
HWLA
GAIN
ZOOMRANGE
MUXNEG
INTERNAL
MUXPOS
First DMA Word Data with MSB to "1"
CDMA Register
2nd DMA Word Data
MSB : 0
31
30
29
28
27
26
25
24
0
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
LT[7:0]
HT[11:8]
HT[7:0]
WM
LT[11:8]
Second DMA Word Data with MSB to "0"
CDMA Register