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USB Low-Full-High Speed Peripherals

Anonymous
Not applicable

Hi all,

I am trying to use CY7C68013 to grab image sensor data. But I am confused about the hardware connection between CY7C68013 and CMOS sensor.

The CMOS has following interface:

  • sysclk (in)
  • exposure (in)
  • line_valid (out)
  • frame_valid (out)
  • pix_clk (out)
  • Data:D0-D7 (out)
  • I2C

My questions are:

1. Where can I interface the line_valid, frame_valid, pix_clk signal?

I found a case from web:

  • pix_clk==>IFCLK,
  • line_valid==>SLWR,
  • frame_valid==>GPIO.

Is this correct? If frame_valid==>GPIO, how can this GPIO control the data transfer?

2. If I want an external camera triggering architecture, the CMOS_exposure should be connnected to CY7C68013 and then use the external_trigger signal to trigger a GPIO interrupt of CY7C68013? Or just connect the external_trigger to CMOS_exposure dirctly?

3. Is it possible to use the CLKOUT of CY7C68013 to source the CMOS_sysclk? (such as 26.66MHz)

4. Which mode is more suited for this application? Slave FIFO or GPIF?

Thanks in advance.

Best,

Zheng Rong

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7 Replies
Anonymous
Not applicable

1

if use fifo

HS connect to SLWR

VS connect to INT0 or INT1

if use GPIF

HS connect to rdy0

vs connetc to rdy1

2 i dont undstand

3 clkout can put 12MHz 24MHZ and 48Mhz

4 slave FIFO is more suited but i use GPIF

because i inter a mark for camera raw data per frame

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Anonymous
Not applicable

Thanks a lot for your reply.

2. I want to trigger the CMOS from an external  device, can I connect the trig-signal to CMOS directly (bypass CY7C68013)?

4. IF use FIFO, we can use the fifo read/write protocol directly. IF use GPIF, we need to use GPIF-designer to generate the W/R state machine which is similar to FIFO mechanism. Is my understanding right?

Best,

Zheng

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Anonymous
Not applicable

2、yes

4、right

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Anonymous
Not applicable

I read the  KBA95736.    But I don't know how to do it.   

The  INT0  is  a falling edge  per frame.   

so  how to  inter a mark package  in the     slave fifo  autoin  mode?

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Anonymous
Not applicable

Hi,

I am also confused by this inserting operation. I am using GPIF-AUTO mode.

Have you got the solution in slave FIFO or GPIF mode?

Any help will be appreciated.

Zheng

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Anonymous
Not applicable

How to  inter a mark for camera raw data per frame?

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Anonymous
Not applicable

Hi Zhanghong,

I am using GPIF mode to transfer data from CMOS chip to host endpoint.

1. I am confused by the waveform design of GPIF. Would you please share your state machine design?

2. I have no idea how to separate the different frame in the packet data. You said you insert a mark in each frame, is this operation for identify the different frame? If so , how to insert the mark data in AUTO-IN mode? From my understanding, the CPU is passed by from the data path and can not interrupt the data transfer.

Thanks in advance.

Zheng

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