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參數(shù)資料
| 型號： | TSL3301-LF |
| 廠商： | TAOS Inc. |
| 英文描述： | 102 】 1 LINEAR OPTICAL SENSOR ARRAY WITH ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 102】1非線性光學傳感器陣列與模擬到數(shù)字轉換器 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 247K |
| 代理商： | TSL3301-LF |
TSL3301LF
102
×
1 LINEAR OPTICAL SENSOR ARRAY
WITH ANALOG-TO-DIGITAL CONVERTER
TAOS0078C
APRIL 2007
7
The
LUMENOLOGY
Company
Copyright 2007, TAOS Inc.
www.taosinc.com
PROGRAMMING INFORMATION
A minimum of 5 clock cycles after the stop bit is required after any command to ensure that the internal logic
actions have been completed.
Reset Commands
Reset commands are used to put the TSL3301
LF into a known state.
IRESET — Interface Initialization
Encoding: Break Character (10 or more consecutive start bits, or zeros)
The commands vary in length from one to three bytes.
IRESET
initializes the internal state machine that keeps
track of which command bytes have been received. This command should be first and given only once after
power-up to synchronize the TSL3301
LF internal command interpreter.
An alternative is to issue three successive
RESET
commands.
RESET — Main Reset
Encoding: 0x1b: <0001_1011>
RESET
resets most of the internal control logic of the TSL3301
LF and any
READPixel
command currently in
progress is aborted.
RESET
puts the pixel integrators into the auto-zero/reset state. Any values that were being
held in the array’s sample/hold circuits are lost.
NOTE:
The value on the SDOUT pin is not guaranteed from the time power is applied until 30 clocks after
the first RESET command is issued.
Pixel Action Commands
Pixel action commands allow the user to control pixel integration and reading of pixel data.
STARTInt — Start Integration
Encoding: 0x08: <0000_1000>
STARTInt
causes each pixel to leave the reset state and to start integrating light. The actual execution
of
STARTInt
is delayed 22 clock cycles until the pixel reset cycle has been completed. (See
imaging
below.)
SAMPLEInt — Stop Integration
Encoding: 0x10: <0001_0000>
SAMPLEInt
causes each pixel to store its integrator’s contents into a sample and hold circuit. Also, the Integrator
is returned to the reset state.
READPixel — Read Pixel Data
Encoding: 0x02: <0000_0010>
READPixel
causes the sampled value of each pixel to be converted to an 8-bit digital value that is clocked out
on the SDOUT pin. The LSB is the first data bit, which is preceded by a START bit (logic 0) and followed by a
STOP bit (logic 1). Each pixel in the device is presented on SDOUT starting from pixel 00 and completes with
pixel 101. There is a 44-clock cycle delay from the completion of the
READPixel
command until the first pixel
data is output.
Gain and offset registers are used to adjust the ADC converter to maximize dynamic range and should be
programmed prior to invoking the
READPixel
command.
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