參數(shù)資料
型號(hào)： AD9898KCPRL-20
廠商： ANALOG DEVICES INC
元件分類： 消費(fèi)家電
英文描述： TVPS00RF-21-41S W/ PC CON
中文描述： SPECIALTY CONSUMER CIRCUIT, QCC48
封裝： MO-220-VKKD-2, LFCSP-48
文件頁(yè)數(shù)： 41/52頁(yè)
文件大小： 557K
代理商： AD9898KCPRL-20
REV. 0
AD9898
–41–
VSUB CONTROL
The CCD readout bias (VSUB) can be programmed to accom-
modate different CCDs. VSUB ON and OFF toggle positions
and polarity are controlled using VSUBTOG (Addr 0x0D) and
VSUBPOL (Addr 0x0D) registers, respectively, as described in
Table XXIV. Since the VSUBTOG is an 11-bit register, the
VSUB ON position is programmable within any line. Figure 43
shows an example of controlling VSUB using these registers.
Table XXIV. VSUB Registers
Register
Name
Bit
Width Type
Register
Range
(Lines) Description
VSUBPOL
VSUBTOG 11
1
Control
Control
(0 = Low, 1 = High)
VSUB Toggle Position
0–2048
2
1
3
4
5
6
3 LINES
2 LINES
HD
VD
SERIAL
WRITES
VSUB
Figure 43. VSUB Timing Example
VSUB Placement and Polarity
Figure 43 shows the sequence of events for programming the
VSUB ON and OFF toggle positions and polarity.
1. Program VSUBTOG = 2 and VSUBPOL = 1.
2. Since VSUBTOG and VSUBPOL are VD synchronous type
registers, the falling edge of VD will update the serial writes
from Step 1 here.
3. VSUB will be asserted high after two HD cycles.
4. Program VSUBTOG = 3 and VSUBPOL = 0.
5. Since VSUBTOG and VSUBPOL are VD synchronous type
registers, the falling edge of VD will update the serial writes
from Step 4 here.
6. VSUB will be asserted low after three HD cycles.
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