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參數(shù)資料
| 型號： | FTF1100MF1 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, XMA |
| 文件頁數(shù)： | 8/39頁 |
| 文件大?。?/td> | 400K |
| 代理商： | FTF1100MF1 |
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FingerTIP
Infineon Technologies
16/38
FTF 1100 MF1 V2.0 databook 3.3 (05.00)
3.5 Selecting the EPP Mode
When power is switched on, the EPP/SPI pin must be set to VCC for selecting the EPP
mode. It is recommended to connect the EPP/SPI pin to VCC by using a pull-up resistor. It
is not possible to change from SPI to EPP mode without switching power off and on. If the
sensor is in EPP mode, the EPP/SPI pin must be at high level all the time.
3.6 Resetting the Pixel Pointer and Changing the Dynamics in EPP Mode
In EPP mode the dynamics can only be changed using the /RESET line. Please note that
via the /RESET signal the dynamics can be changed only from low to high but not vice
versa. To change the dynamics to low, the complete image must be read out. After the last
byte of the image has been read out, the sensor resets its internal dynamics register. Now
the dynamics is set to low by default. With the following reset only the pixel pointer is set to
position (1,1) – the dynamics is still low. The next (optional) reset also sets the pixel
pointer to position (1,1) and additionally changes the dynamics to high (figure 7). Further
resets only set the pixel pointer to position (1,1) but do not change the dynamics which
remains high.
Note that switching on the sensor while reset is low can be interpreted as the first reset. In
this case, the next reset will change the dynamics to high. If the images must be read out
in low dynamics, the image from the first readout should not be used.
Figure 7: Changing the Dynamics to high after Readout of the Complete Image
3.7 Set the FingerTIP into Sleep Mode in EPP Mode
The FingerTIP offers a sleep mode to save power and increase the life time of the
sensor. In EPP mode the sensor can be switched to sleep mode by pulling down the reset
line for more than 2s as shown in figure 8. Therefore it is recommended to switch the
sensor to sleep mode whenever there is no readout of an image. When the sensor is
switched back to readout mode, a new fingerprint can be acquired immediately.
Figure 8: Set the Sensor to Sleep Mode
T
Min = 2 s
T
Min = 1 s
1st reset
set pixel pointer: (1,1)
/RESET
T
Min = 2 s
2nd reset
dynamics: low
dynamics: high
set pixel pointer: (1,1)
Sensor in Readout Mode
/RESET
T
Min = 2 s
Sensor in Sleep Mode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FTF1100MF1V2.0 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| FTF1100MF1V2.1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| FTF3020-C | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor |
| FTF3020-C/EG | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor |
| FTF3020-C/HG | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor |
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