參數(shù)資料
型號(hào)： LM9617
廠商： National Semiconductor Corporation
英文描述： Monochrome CMOS Image Sensor VGA 30 FPS
中文描述： 單色CMOS圖像傳感器顯卡30醫(yī)科
文件頁(yè)數(shù)： 27/37頁(yè)
文件大?。?/td> 366K
代理商： LM9617
Confidential
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Register Set
(continued)
Register Name Snapshot Mode Configuration Register 0
Address
09 Hex
Mnemonic
SNAPMODE0
Type
Read/Write
Reset Value
00 Hex
Register Name Snapshot Mode Configuration Register 1
Address
0A Hex
Mnemonic
SNAPMODE1
Type
Read/Write
Reset Value
00 Hex.
Bit
Bit Symbol
Description
7.6
SsFrames
Program to set the number of
frames required before readout
during a snapshot with no external
shutter, (see Figure 18). By
default these two bits are set to 00
resulting in one frame before
readout:
5
ShutterEn
Assert to indicate that an external
shutter will be used during snap-
shot mode. Clear (the default) to
indicate that snapshot mode will
be carried out without the aid of an
external shutter.
4
ExtSynPol
Assert to set the active level of the
extsync
signal to 0. Clear (the
default) to set the active level of
the
extsync
signal to 1.
3
Reserved
2
SnapshotMod
Assert to set the
snapshot
pin to
level mode. In level mode the sen-
sor will continually run snapshot
sequences as long as the
snap-
shot
pin is held to the active level.
Clear (the default) to set the
snap-
shot
signal to pulse mode. In
pulse mode the sensor will only
carry out one snapshot sequence
per pulse applied to the
snapshot
pin.
1
SnapShotPol
Assert to set the snapshot pin to
be active on the positive edge.
Clear (the default) to set the snap-
shot pin to be active on the nega-
tive edge.
0
IrqPol
Assert to set the active level of the
irq
signal to 0, Clear (the default)
to set the active level of the
irq
signal to 1.
0
one frame
01
10
two frames
three frames
11
four frames
Bit
Bit Symbol
Description
7
SnapIntEn
Assert to enable the snapshot
interrupt generator. Clear (the
default) to disable the interrupt
generator.
6
SsTrigFlag
(Read Only Bit)
Snapshot trigger interrupt flag.
A logic 1 in this bit indicates that
the generated interrupt on the
irq
pin is due to a snapshot trig-
ger. This bit is cleared when
read.
5
SsRdFlag
(Read Only Bit)
Snapshot read done interrupt
flag. A logic 1 in this bit indicates
that the generated interrupt on
the
irq
pin is due to the comple-
tion of a snapshot readout
sequence. This bit is cleared
when read.
4
SsEngage
Assert to allow a CPU controlled
snapshot sequence. In this
mode the snapshot trigger will
only generate an interrupt to the
CPU and the CPU must manu-
ally start the snapshot sequence
by asserting the
FTriggerEn
bit
of this register.
Clear (the default) engage an
automatic snapshot sequence.
In auto mode the snapshot
sequence is started as soon as
a snapshot trigger is asserted.
3
FtSync
(Read Only Bit)
The internal synchronisation
signal. A logic 1 on this bit indi-
cates a synchronization event is
required. This bit is functionally
equivalent to the external
extsync
pin.
2
FtBusy
(Read Only Bit)
The Frame Trigger Busy bit. A
logic 1 on this bit indicates that
the sensor is busy reading out
pixel data as shown in Figure
18.
1
FTriggerNow
Assert to start a snapshot
sequence. The frame trigger
now is functionally equivalent to
the external
snapshot
pin. The
default is 0.
0
FTriggerEn
Assert to enable a snapshot
sequence (see the
SsEngage
bit of this register). The default
is 0.
L
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