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EPC635 датащи(PDF) 64 Page - Espros Photonics corp

номер детали EPC635
подробное описание детали  3D TOF Imager 160 x 60 Pixel
PDF  97 Pages
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производитель  EPC [Espros Photonics corp]
домашняя страница  http://www.espros.ch
Logo EPC - Espros Photonics corp

EPC635 датащи(HTML) 64 Page - Espros Photonics corp

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7.10. External modulation MODCLK
The epc635 has for enhanced user applications also the possibility to bring an external modulation clock to the chip. The optional MOD-
CLK input can be used for this to inject in parallel a user controlled/modulated clock for both the LED driver and the pixel demodulator, see
Figure 59.
Memory
Controller
&
Registers
Phase
Detector
m+n
Clock Delay
Pixel
Cont.
&
Seq.
Memory
I2C Slave
TCMI
160x60
Pixel Field
SCL
SDA
VDD
VDDIO
XTALOUT
XTALIN_CLKIN
PLL
CGU
ADC Read-Out
Charge
Pump
13V
EEPROM
LED Driver
LED (open-drain)
Modulator
LEDFB
De-
modulator
DATA[11:0]
DCLK
Temp.
Sensor
VSSLED
VSYNC_PSDIAG_A0
VSSIO
ROW Buffer
VDDPXH
epc635
OSC
VBS
VDDA
VSSA
SHUTTER
JTAG
HSYNC_A1
XSYNC_SAT_CFG
RGU
DLL
0
1
LED2 (push-pull)
Figure 59: The MODCLK signal flow (red marked)
The external MODCLK can be used e.g. in concepts for reliable multi camera applications. It allows to use e.g. frequency-division multiple
access (FDMA). In corresponding literature, the details of these concepts are explained in detail.
The user is free to apply any digital waveform up to 80MHz during frame acquisition as external MODCLK signal. Even more, he is also
free to use modulations like pseudo-random edge jitter, dithering, etc.
The signal from the MODCLK pin is used as far in the register CLK_enables is set to mod_clk_sel = 1, see section 8.7.1.
IMPORTANT:
■ The external modulation clock replaces the internal generated modulation clock, refer also to Table 33. Based on this clock, the modula-
tor generates the modulation sequence according chapter 6., Measurement Modes and the setting in the MOD_Control register.
■ Set DLL_measurement_rate = 0 for switching off the automatic DLL synchronization.
© 2017 ESPROS Photonics Corporation
Characteristics subject to change without notice
64 / 97
Datasheet_epc635-V1.02
www.espros.com



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