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AS3820 датащи(PDF) 20 Page - Dialog Semiconductor

номер детали AS3820
подробное описание детали  16-Channel White LED Controller for LCD Backlight
PDF  52 Pages
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производитель  DIALOG [Dialog Semiconductor]
домашняя страница  http://www.dialog-semiconductor.com/
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AS3820 датащи(HTML) 20 Page - Dialog Semiconductor

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AS3820
16-Channel White LED Controller for LCD Backlight
Rev. 1.1
Datasheet
© 2019 Dialog Semiconductor
www.dialog-semiconductor.com
20 of 52
05-Feb-2019
Addr: 0x60
STATUS
Bit
Bit Name
Default
Access
Bit Description
7
STAT novsync
0
R
1...Indicates missing Vsync signal for
longer than 100ms
6
STAT OT
0
R
1...Indicates Overtemperature fault
happened
5
STAT Open
0
R
1...Indicates open detection fault happened
4
Short_bist
0
R
1...Indicates a short bist interrupt
3
Vcnt underflow
0
AS_WC
1...VSYNC signal to fast
2
Short2
0
AS_WC
1...Indicates short on channel group 2
1
Short1
0
AS_WC
1...Indicates short on channel group 1
0
Power_good
0
R
1...Power good. Indicates that VDD is
greater than VDD_UVL
Table 18: STATUS
Addr: 0x63
SHORT_BIST_CTRL1
Bit
Bit Name
Default
Access
Bit Description
7:5
000
R
Do not change
4
BIST_retrial
0
RW
0...No BIST retrial
1...Short BIST retrial after 1 second
3
BIST_steptime
0
RW
BIST counter step down time
0...64μs/step
1...128μs/step
2
Autotoff_BIST
0
RW
1...Shorted channels found by BIST are
turned OFF
1:0
BIST_wait
0
RW
Wait after max step down value of
counter is reached(1)
00...No wait
01...Wait 1 VSYNC pulse
10...Wait 2 VSYNC pulses
11...Wait 3 VSYNC pulses
Note 1.
This option is necessary for phase shifted PWM. To ensure each channel is tested.
Table 19: SHORT_BIST_CTRL1
Addr: 0x64
SHORT_BIST_MAXSTEP
Bit
Bit Name
Default
Access
Bit Description
7:0
BISTmaxstep
11111111
RW
Maximum down-counts of IDAC counter
during BIST
Table 20: SHORT_BIST_MAXSTEP



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