參數(shù)資料
型號(hào)： ADS7953SRHBT
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 16-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC32
封裝： GREEN, PLASTIC, PQFP-32
文件頁(yè)數(shù)： 24/63頁(yè)
文件大小： 1734K
代理商： ADS7953SRHBT
Device operation in Manual or
Auto-2 mode
Change to Auto
-1 mode?
* Sample: Samplesandconvertschannelselectedin ‘framen -1’
* Mux
: Selectschannelincrementedfrompreviousframeasper Auto -2 sequence, orchannel
programmedinpreviousframeincaseofmanualmode. Thischannelwillbeacquiredinthisframe
andsampledatstartof ‘framen +1’
* Range: Asprogrammedin ‘framen-1’ . Appliestochannelselectedforacquisitionincurrentframe
.
* SDI
: Programmingfor ‘framen+1’
DI15..12 = 0010 binary …. Selects Auto-1 mode
DI11=1 enablesprogrammingof ‘rangeandGPIO’
DI10 = x, Deviceautomaticallyresetschanneltolowestnumberin Auto -1 sequence.
DI6.. Asperrequiredrangeforchanneltobeselected
DI5=0 .. Nopowerdown
DI4..0… asperGPIOsettings
*SDO : DO15..0 address (orGPIOdata) & conversiondataofchannelselectedin ‘framen -1’
* GPIO :
O/P: latchedon CS fallingedgeasperDI 3..0 writteninframen-1’
I/P: Inputstatuslatchedonfallingedgeof CS andtransferredseriallyonSDOinthesame
frame
No
Yes
CS
Continue operation in Auto -1 mode
CS
Frame: n-1
Frame: n
Request
for Auto-1
mode
* Sample: Samplesandconvertschannelselectedin ‘framen’
* Mux
: Selectslowestchannel# in Auto-1 sequence; thischannelwillbeacquiredinthisframeand
sampledatstartof ‘framen+2’
* Range: Asprogrammedin ‘framen’. Appliestochannelselectedforacquisitionincurrentframe
.
* SDI
: Programmingfor ‘framen +2’
DI15..12 = 0010 binary …. Tocontinuein Auto -1 mode
DI11=1 enablesprogrammingof ‘rangeandGPIO’
DI10 =0, nottoresetchannelsequence
DI6.. Asperrequiredrangeforchanneltobeselected
DI5=0 .. Nopowerdown
DI4..0… asperGPIOsettings
*SDO : DO15..0 address (orGPIOdata) & conversiondataofchannelselectedin ‘framen’
* GPIO :
O/P: latchedon CS fallingedgeasperDI 3..0 writteninframe ‘n’
I/P: Inputstatuslatchedonfallingedgeof CS andtransferredseriallyonSDOinthesame
frame
CS
Frame:
n+1
Entryinto
Auto-1
Mode
* Sample: Samplesandconvertschannelselectedin ‘framen+1’ (ie. Lowestchannel# in Auto-1
sequence)
* Mux
: Selectsnexthigherchannelin Auto -1 sequence, thischannelwillbeacquiredinthisframe
andsampledatstartof ‘framen +3’
* Range: Asprogrammedin ‘framen+1’ . Appliestochannelselectedforacquisitionincurrentframe.*
SDI
: Programmingfor ‘framen+3’
DI15..12 = 0010 binary …. Tocontinuein Auto -1 mode
DI11=1 enablesprogrammingof ‘rangeandGPIO’
DI10 =0 nottoresetchannelsequence
DI6.. Asperrequiredrangeforchanneltobeselected
DI5=0 .. Nopowerdown
DI4..0… asperGPIOsettings
*SDO : DO15..0 address (orGPIOdata) & conversiondataofchannelselectedin ‘framen+1’
* GPIO :
O/P: latchedon CS fallingedgeasperDI3..0 writteninframen+1’
I/P: Inputstatuslatchedonfallingedgeof CS andtransferredseriallyonSDOinthesame
frame
CS
Frame:
n+2
Operation
in Auto-1
mode
SLAS605A – JUNE 2008 – REVISED JANUARY 2010
www.ti.com
OPERATING IN AUTO-1 MODE
The details regarding entering and running in Auto-1 channel sequencing mode are illustrated in the flowchart in
Figure 51. Table 2 lists the Mode Control Register settings for Auto-1 mode in detail.
Figure 51. Entering and Running in Auto-1 Channel Sequencing Mode
30
Copyright 2008–2010, Texas Instruments Incorporated
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參數(shù)描述
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