參數(shù)資料
型號: AD9848
廠商: Analog Devices, Inc.
英文描述: CCD Signal Processors with Integrated Timing Driver
中文描述: CCD信號處理器集成時序驅(qū)動
文件頁數(shù): 12/36頁
文件大?。?/td> 347K
代理商: AD9848
REV. 0
AD9848/AD9849
–12–
SERIAL INTERFACE TIMING
SDATA
A0
A1
A2
A4
A5
A6
A7
D0
D1
D2
D3
D4
D5
XX
XX
SCK
SL
A3
NOTES
1. SDATA BITS ARE LATCHED ON SCK RISING EDGES.
2. 14 SCK EDGES ARE NEEDED TO WRITE ADDRESS AND DATA BITS.
3. FOR 16-BIT SYSTEMS, TWO EXTRA DUMMY BITS MAY BE WRITTEN. DUMMY BITS ARE IGNORED.
4. NEW DATA IS UPDATED AT EITHER THE SL RISING EDGE, OR AT THE HD FALLING EDGE AFTER THE NEXT VD FALLING EDGE.
5. VD/HD UPDATE POSITION MAY BE DELAYED TO ANY HD FALLING EDGE IN THE FIELD USING THE UPDATE REGISTER.
VD
HD
SL UPDATED
VD/HD UPDATED
t
DS
t
DH
t
LS
t
LH
Figure 3a. Serial Write Operation
SDATA
A0
A1
A2
A4
A5
A6
A7
D0
D1
D2
D3
D4
D5
SCK
SL
A3
NOTES
1. MULTIPLE SEQUENTIAL REGISTERS MAY BE LOADED CONTINUOUSLY.
2. THE FIRST (LOWEST ADDRESS) REGISTER ADDRESS IS WRITTEN, FOLLOWED BY MULTIPLE 6-BIT DATA WORDS.
3. THE ADDRESS WILL AUTOMATICALLY INCREMENT WITH EACH 6-BIT DATA WORD (ALL 6 BITS MUST BE WRITTEN).
4. SL IS HELD LOW UNTIL THE LAST DESIRED REGISTER HAS BEEN LOADED.
5. NEW DATA IS UPDATED AT EITHER THE SL RISING EDGE, OR AT THE HD FALLING EDGE AFTER THE NEXT VD FALLING EDGE.
D0
D1
D2
D3
D4
D5
D0
...
...
...
DATA FOR STARTING
REGISTER ADDRESS
DATA FOR NEXT
REGISTER ADDRESS
D2
D1
Figure 3b. Continuous Serial Write Operation
COMPLETE REGISTER LISTING
Table I
Register
Description
Register
Description
oprmode
ctlmode
preventpdate
readback
vdhdpol
fieldval
hblkretime
tgcore_rstb
h12pol
h1posloc
h1negloc
AFE Operation Modes
AFE Control Modes
Prevents Loading of VD-Updated Registers
Enables Serial Register Readback Mode
VD/HD Active Polarity
Internal Field Pulse Value
Retimes the H1 hblk to Internal Clock
Reset Bar Signal for Internal TG Core
H1/H2 Polarity Control
H1 Positive Edge Location
H1 Negative Edge Location
h1drv
h2drv
h3drv
h4drv
rgpol
rgposloc
rgnegloc
rgdrv
shpposloc
shdposloc
H1 Drive Current
H2 Drive Current
H3 Drive Current
H4 Drive Current
RG Polarity
RG Positive Edge Location
RG Negative Edge Location
RG Drive Current
SHP Sample Location
SHD Sample Location
Notes on Register Listing:
1. All addresses and default values are expressed in Hexadecimal.
2. All registers are VD/HD updated as shown in Figure 3, except for the above-listed registers that are SL updated.
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