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參數(shù)資料
| 型號： | ADNS-3080 |
| 廠商： | Avago Technologies Ltd. |
| 英文描述： | High-Performance Optical Mouse Sensor |
| 中文描述： | 高性能光學(xué)鼠標(biāo)傳感器 |
| 文件頁數(shù)： | 20/39頁 |
| 文件大?。?/td> | 655K |
| 代理商： | ADNS-3080 |
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20
Frame Capture
This is a fast way to download a full array of pixel values
from a single frame. This mode disables navigation and
overwrites any downloaded firmware. A hardware reset
is required to restore navigation, and the firmware must
be reloaded afterwards if required.
To trigger the capture, write to the Frame_Capture
register. The next available complete 1 2/3 frames (1536
values) will be stored to memory. The data are is retrieved
by reading the Pixel_Burst register once using the normal
read method, after which the remaining bytes are clocked
out by driving SCLK at the normal rate. The byte time
must be at least t
LOAD
. If the Pixel_ Burst register is read
before the data is ready, it will return all zeros.
To read a single frame, read a total of 900 bytes. The next
636 bytes will be approximately 2/3 of the next frame.
The first pixel of the first frame (1st read) has bit 6 set to
1 as a start-of-frame marker. The first pixel of the second
partial frame (901st read) will also have bit 6 set to 1. All
other bytes have bit 6 set to zero. The MSB of all bytes is
set to 1. If the Pixel_Burst register is read past the end
of the data (1537 reads and on) , the data returned will
be zeros.
After the download is complete, the micro-controller
must raise the NCS line for at least t
BEXIT
to terminate
burst mode. The read may be aborted at any time by
raising NCS.
Alternatively, the frame data can also be read one byte at
a time from the Frame_Capture register. See the register
description for more information.
Figure 24. Frame capture burst mode timing
NCS
address
data
address
address
MOSI
SCLK
P0
P1
P899
MISO
t
NCS-SCLK
>120ns
frame capture reg write
enter burst
mode
t
CAPTURE
t
≥
10
μ
s
Notes:
1. MSB = 1 for all bytes. Bit 6 = 0 for all bytes except pixel 0 of both frames which has bit 6 = 1 for use as a frame marker.
2. Reading beyond pixel 899 will return the first pixel of the second partial frame.
3. t
CAPTURE
= 10
μ
s + 3 frame periods.
4. This figure illustrates reading a single complete frame of 900 pixels. An additional 636 pixels from the next frame are available.
t
≥
10
μ
s
t
SRAD
pixel dump reg read
P0 bit 6 set to 1
all MSB = 1
see note 2
soonest to begin again
frame capture reg
exit burst mode
t
BEXIT
≥
50
μ
s
≥
4
μ
s
≥
10
μ
s
相關(guān)PDF資料 |
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|---|---|
| ADNS-3150-001 | Optical Mouse Designer’s Kit |
| ADNS-5020-EN | Optical Mouse Sensor |
| ADNS-5030 | Low Power Optical Mouse Sensor |
| ADNS-5100 | Solid-State Optical Mouse Lens |
| ADNS-5100-001 | Solid-State Optical Mouse Lens |
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參數(shù)描述 |
|---|---|
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