ZHCSIP7B August   2018  – September 2023 DS90UB962-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
    1.     Pin Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  DC Electrical Characteristics
    6. 6.6  AC Electrical Characteristics
    7. 6.7  CSI-2 Timing Specifications
    8. 6.8  Recommended Timing for the Serial Control Bus
    9. 6.9  Timing Diagrams
    10. 6.10 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Functional Description
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1  CSI-2 Mode
      2. 7.4.2  RAW Mode
      3. 7.4.3  MODE Pin
      4. 7.4.4  REFCLK
      5. 7.4.5  Receiver Port Control
        1. 7.4.5.1 Video Stream Forwarding
      6. 7.4.6  Input Jitter Tolerance
      7. 7.4.7  Adaptive Equalizer
        1. 7.4.7.1 Transmission Distance
        2. 7.4.7.2 Channel Requirements
        3. 7.4.7.3 Adaptive Equalizer Algorithm
        4. 7.4.7.4 AEQ Settings
          1. 7.4.7.4.1 AEQ Start-Up and Initialization
          2. 7.4.7.4.2 AEQ Range
          3. 7.4.7.4.3 AEQ Timing
          4. 7.4.7.4.4 AEQ Threshold
      8. 7.4.8  Channel Monitor Loop-Through Output Driver
        1. 7.4.8.1 Code Example for CMLOUT FPD3 RX Port 0:
      9. 7.4.9  RX Port Status
        1. 7.4.9.1 RX Parity Status
        2. 7.4.9.2 FPD-Link Decoder Status
        3. 7.4.9.3 RX Port Input Signal Detection
        4. 7.4.9.4 Line Counter
        5. 7.4.9.5 Line Length
      10. 7.4.10 Sensor Status
      11. 7.4.11 GPIO Support
        1. 7.4.11.1 GPIO Input Control and Status
        2. 7.4.11.2 GPIO Output Pin Control
        3. 7.4.11.3 Forward Channel GPIO
        4. 7.4.11.4 Back Channel GPIO
        5. 7.4.11.5 GPIO Pin Status
        6. 7.4.11.6 Other GPIO Pin Controls
      12. 7.4.12 RAW Mode LV / FV Controls
      13. 7.4.13 CSI-2 Protocol Layer
      14. 7.4.14 CSI-2 Short Packet
      15. 7.4.15 CSI-2 Long Packet
      16. 7.4.16 CSI-2 Data Identifier
      17. 7.4.17 Virtual Channel and Context
      18. 7.4.18 CSI-2 Mode Virtual Channel Mapping
        1. 7.4.18.1 Example
      19. 7.4.19 CSI-2 Transmitter Frequency
      20. 7.4.20 CSI-2 Output Bandwidth
        1. 7.4.20.1 CSI-2 Output Bandwidth Calculation Example
      21. 7.4.21 CSI-2 Transmitter Status
      22. 7.4.22 Video Buffers
      23. 7.4.23 CSI-2 Line Count and Line Length
      24. 7.4.24 FrameSync Operation
        1. 7.4.24.1 External FrameSync Control
        2. 7.4.24.2 Internally Generated FrameSync
          1. 7.4.24.2.1 Code Example for Internally Generated FrameSync
      25. 7.4.25 CSI-2 Forwarding
        1. 7.4.25.1 Best-Effort Round Robin CSI-2 Forwarding
        2. 7.4.25.2 Synchronized CSI-2 Forwarding
        3. 7.4.25.3 Basic Synchronized CSI-2 Forwarding
          1. 7.4.25.3.1 Code Example for Basic Synchronized CSI-2 Forwarding
        4. 7.4.25.4 Line-Interleaved CSI-2 Forwarding
          1. 7.4.25.4.1 Code Example for Line-Interleaved CSI-2 Forwarding
        5. 7.4.25.5 Line-Concatenated CSI-2 Forwarding
          1. 7.4.25.5.1 Code Example for Line-Concatenated CSI-2 Forwarding
        6. 7.4.25.6 CSI-2 Transmitter Output Control
        7. 7.4.25.7 Enabling and Disabling CSI-2 Transmitters
    5. 7.5 Programming
      1. 7.5.1  Serial Control Bus
      2. 7.5.2  Second I2C Port
      3. 7.5.3  I2C Target Operation
      4. 7.5.4  Remote Target Operation
      5. 7.5.5  Remote Target Addressing
      6. 7.5.6  Broadcast Write to Remote Devices
        1. 7.5.6.1 Code Example for Broadcast Write
      7. 7.5.7  I2C Controller Proxy
      8. 7.5.8  I2C Controller Proxy Timing
        1. 7.5.8.1 Code Example for Configuring Fast-Mode Plus I2C Operation
      9. 7.5.9  Interrupt Support
        1. 7.5.9.1 Code Example to Enable Interrupts
        2. 7.5.9.2 FPD-Link III Receive Port Interrupts
        3. 7.5.9.3 Interrupts on Forward Channel GPIO
        4. 7.5.9.4 Interrupts on Change in Sensor Status
        5. 7.5.9.5 Code Example to Readback Interrupts
        6. 7.5.9.6 CSI-2 Transmit Port Interrupts
      10. 7.5.10 Error Handling
        1. 7.5.10.1 Receive Frame Threshold
        2. 7.5.10.2 Port PASS Control
      11. 7.5.11 Timestamp – Video Skew Detection
      12. 7.5.12 Pattern Generation
        1. 7.5.12.1 Reference Color Bar Pattern
        2. 7.5.12.2 Fixed Color Patterns
        3. 7.5.12.3 Pattern Generator Programming
          1. 7.5.12.3.1 Determining Color Bar Size
        4. 7.5.12.4 Code Example for Pattern Generator
      13. 7.5.13 FPD-Link BIST Mode
        1. 7.5.13.1 BIST Operation
    6. 7.6 Register Maps
      1. 7.6.1 Main Registers
      2. 7.6.2 Indirect Access Registers
        1. 7.6.2.1 PATGEN_And_CSI-2 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Power Over Coax
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
    4. 8.4 Power Supply Recommendations
      1. 8.4.1 VDD Power Supply
      2. 8.4.2 Power-Up Sequencing
        1. 8.4.2.1 PDB Pin
        2. 8.4.2.2 System Initialization
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
        1. 8.5.1.1 Ground
        2. 8.5.1.2 Routing FPD-Link III Signal Traces and PoC Filter
        3. 8.5.1.3 CSI-2 Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 支持资源
    4. 9.4 Trademarks
    5. 9.5 静电放电警告
    6. 9.6 术语表
  11. 10Mechanical, Packaging, and Orderable Information

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7.5.9.5 Code Example to Readback Interrupts

INTERRUPT_STS = ReadI2C(0x24) # 0x24 INTERRUPT_STS 
if ((INTERRUPT_STS & 0x80) >> 7):
    print "# GLOBAL INTERRUPT DETECTED "
if ((INTERRUPT_STS & 0x40) >> 6):
    print "# RESERVED "
if ((INTERRUPT_STS & 0x20) >> 5):
    print "# IS_CSI_TX1 DETECTED "
if ((INTERRUPT_STS & 0x10) >> 4):
    print "# IS_CSI_TX0 DETECTED "
if ((INTERRUPT_STS & 0x08) >> 3):
    print "# IS_RX3 DETECTED "
if ((INTERRUPT_STS & 0x04) >> 2):
    print "# IS_RX2 DETECTED "
if ((INTERRUPT_STS & 0x02) >> 1):
    print "# IS_RX1 DETECTED "
if ((INTERRUPT_STS & 0x01) ):
    print "# IS_RX0 DETECTED "
# "################################################"
#  "RX0 status"
# "################################################"
WriteReg(0x4C,0x01) # RX0
PORT_ISR_LO = ReadI2C(0xDB)
print "0xDB PORT_ISR_LO : ", hex(PORT_ISR_LO) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_LO & 0x40) >> 6):
    print "# IS_LINE_LEN_CHG INTERRUPT DETECTED "
if ((PORT_ISR_LO & 0x20) >> 5):
    print "# IS_LINE_CNT_CHG DETECTED "
if ((PORT_ISR_LO & 0x10) >> 4):
    print "# IS_BUFFER_ERR DETECTED "
if ((PORT_ISR_LO & 0x08) >> 3):
    print "# IS_CSI_RX_ERR DETECTED "
if ((PORT_ISR_LO & 0x04) >> 2):
    print "# IS_FPD3_PAR_ERR DETECTED " # Forward Channel parity errors exceed set threshold
if ((PORT_ISR_LO & 0x02) >> 1):
    print "# IS_PORT_PASS DETECTED "    # RX Port PASS status has changed since last read
if ((PORT_ISR_LO & 0x01) ) :
    print "# IS_LOCK_STS DETECTED "     # RX Port LOCK status has changed since last read
################################################
PORT_ISR_HI = ReadI2C(0xDA)
print "0xDA PORT_ISR_HI : ", hex(PORT_ISR_HI) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_HI & 0x04) >> 2):
    print "# IS_FPD3_ENC_ERR DETECTED "
if ((PORT_ISR_HI & 0x02) >> 1):
    print "# IS_BCC_SEQ_ERR DETECTED "
if ((PORT_ISR_HI & 0x01) ) :
    print "# IS_BCC_CRC_ERR DETECTED "
################################################
RX_PORT_STS1 = ReadI2C(0x4D) # R/COR
if (  (RX_PORT_STS1 & 0xc0) >> 6) == 3:
    print "# RX_PORT_NUM = RX3"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 2:
    print "# RX_PORT_NUM = RX2"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 1:
    print "# RX_PORT_NUM = RX1"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 0:
    print "# RX_PORT_NUM = RX0"
    
if ((RX_PORT_STS1 & 0x20) >> 5):
    print "# BCC_CRC_ERR DETECTED "
if ((RX_PORT_STS1 & 0x10) >> 4):
    print "# LOCK_STS_CHG DETECTED "
if ((RX_PORT_STS1 & 0x08) >> 3):
    print "# BCC_SEQ_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x04) >> 2):
    print "# PARITY_ERROR DETECTED " # Cleared when RX_PAR_ERR_HI/LO registers are cleared
if ((RX_PORT_STS1 & 0x02) >> 1):
    print "# PORT_PASS=1 "           # Shows current PASS status at RX Port
if ((RX_PORT_STS1 & 0x01) ):
    print "# LOCK_STS=1 "            # Shows current LOCK status at RX Port 
################################################
RX_PORT_STS2 = ReadI2C(0x4E)
if ((RX_PORT_STS2 & 0x80) >> 7):
    print "# LINE_LEN_UNSTABLE DETECTED "
if ((RX_PORT_STS2 & 0x40) >> 6):
    print "# LINE_LEN_CHG "
if ((RX_PORT_STS2 & 0x20) >> 5):
    print "# FPD3_ENCODE_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x10) >> 4):
    print "# BUFFER_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x08) >> 3):
    print "# CSI_ERR DETECTED "       # Clears when CSI_RX_STS register is cleared
if ((RX_PORT_STS2 & 0x04) >> 2):
    print "# FREQ_STABLE DETECTED "
if ((RX_PORT_STS2 & 0x02) >> 1):
    print "# NO_FPD3_CLK DETECTED "
if ((RX_PORT_STS2 & 0x01) ):
    print "# LINE_CNT_CHG DETECTED "
################################################
# "################################################"
#  "RX1 status"
# "################################################"
WriteReg(0x4C,0x12) # RX1
PORT_ISR_LO = ReadI2C(0xDB) # PORT_ISR_LO readout; cleared by RX_PORT_STS2
if ((PORT_ISR_LO & 0x40) >> 6):
    print "# IS_LINE_LEN_CHG INTERRUPT DETECTED "
if ((PORT_ISR_LO & 0x20) >> 5):
    print "# IS_LINE_CNT_CHG DETECTED "
if ((PORT_ISR_LO & 0x10) >> 4):
    print "# IS_BUFFER_ERR DETECTED "
if ((PORT_ISR_LO & 0x08) >> 3):
    print "# IS_CSI_RX_ERR DETECTED "
if ((PORT_ISR_LO & 0x04) >> 2):
    print "# IS_FPD3_PAR_ERR DETECTED " # Forward Channel parity errors exceed set threshold 
if ((PORT_ISR_LO & 0x02) >> 1):
    print "# IS_PORT_PASS DETECTED "    # RX Port PASS status has changed since last read
if ((PORT_ISR_LO & 0x01) ) :
    print "# IS_LOCK_STS DETECTED "     # RX Port LOCK status has changed since last read 
################################################
PORT_ISR_HI = ReadI2C(0xDA) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_HI & 0x04) >> 2):
    print "# IS_FPD3_ENC_ERR DETECTED "
if ((PORT_ISR_HI & 0x02) >> 1):
    print "# IS_BCC_SEQ_ERR DETECTED "
if ((PORT_ISR_HI & 0x01) ) :
    print "# IS_BCC_CRC_ERR DETECTED "
################################################
RX_PORT_STS1 = ReadI2C(0x4D) # R/COR
if (  (RX_PORT_STS1 & 0xc0) >> 6) == 3:
    print "# RX_PORT_NUM = RX3"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 2:
    print "# RX_PORT_NUM = RX2"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 1:
    print "# RX_PORT_NUM = RX1"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 0:
    print "# RX_PORT_NUM = RX0"
    
if ((RX_PORT_STS1 & 0x20) >> 5):
    print "# BCC_CRC_ERR DETECTED "
if ((RX_PORT_STS1 & 0x10) >> 4):
    print "# LOCK_STS_CHG DETECTED "
if ((RX_PORT_STS1 & 0x08) >> 3):
    print "# BCC_SEQ_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x04) >> 2):
    print "# PARITY_ERROR DETECTED " # Cleared when RX_PAR_ERR_HI/LO registers are cleared
if ((RX_PORT_STS1 & 0x02) >> 1):
    print "# PORT_PASS=1 "           # Shows current PASS status at RX Port
if ((RX_PORT_STS1 & 0x01) ):
    print "# LOCK_STS=1 "            # Shows current LOCK status at RX Port
################################################
RX_PORT_STS2 = ReadI2C(0x4E)
if ((RX_PORT_STS2 & 0x80) >> 7):
    print "# LINE_LEN_UNSTABLE DETECTED "
if ((RX_PORT_STS2 & 0x40) >> 6):
    print "# LINE_LEN_CHG "
if ((RX_PORT_STS2 & 0x20) >> 5):
    print "# FPD3_ENCODE_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x10) >> 4):
    print "# BUFFER_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x08) >> 3):
    print "# CSI_ERR DETECTED "      # Clears when CSI_RX_STS register is cleared
if ((RX_PORT_STS2 & 0x04) >> 2):
    print "# FREQ_STABLE DETECTED "
if ((RX_PORT_STS2 & 0x02) >> 1):
    print "# NO_FPD3_CLK DETECTED "
if ((RX_PORT_STS2 & 0x01) ):
    print "# LINE_CNT_CHG DETECTED "
################################################
# "################################################"
#  "RX2 status"
# "################################################"
WriteReg(0x4C,0x24) # RX2
PORT_ISR_LO = ReadI2C(0xDB) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_LO & 0x40) >> 6):
    print "# IS_LINE_LEN_CHG INTERRUPT DETECTED "
if ((PORT_ISR_LO & 0x20) >> 5):
    print "# IS_LINE_CNT_CHG DETECTED "
if ((PORT_ISR_LO & 0x10) >> 4):
    print "# IS_BUFFER_ERR DETECTED "
if ((PORT_ISR_LO & 0x08) >> 3):
    print "# IS_CSI_RX_ERR DETECTED "
if ((PORT_ISR_LO & 0x04) >> 2):
    print "# IS_FPD3_PAR_ERR DETECTED " # Forward Channel parity errors exceed set threshold 
if ((PORT_ISR_LO & 0x02) >> 1):
    print "# IS_PORT_PASS DETECTED "    # RX Port PASS status has changed since last read
if ((PORT_ISR_LO & 0x01) ) :
    print "# IS_LOCK_STS DETECTED "     # RX Port LOCK status has changed since last read
################################################
PORT_ISR_HI = ReadI2C(0xDA) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_HI & 0x04) >> 2):
    print "# IS_FPD3_ENC_ERR DETECTED "
if ((PORT_ISR_HI & 0x02) >> 1):
    print "# IS_BCC_SEQ_ERR DETECTED "
if ((PORT_ISR_HI & 0x01) ) :
    print "# IS_BCC_CRC_ERR DETECTED "
################################################
RX_PORT_STS1 = ReadI2C(0x4D) # R/COR
if (  (RX_PORT_STS1 & 0xc0) >> 6) == 3:
    print "# RX_PORT_NUM = RX3"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 2:
    print "# RX_PORT_NUM = RX2"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 1:
    print "# RX_PORT_NUM = RX1"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 0:
    print "# RX_PORT_NUM = RX0"
    
if ((RX_PORT_STS1 & 0x20) >> 5):
    print "# BCC_CRC_ERR DETECTED "
if ((RX_PORT_STS1 & 0x10) >> 4):
    print "# LOCK_STS_CHG DETECTED "
if ((RX_PORT_STS1 & 0x08) >> 3):
    print "# BCC_SEQ_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x04) >> 2):
    print "# PARITY_ERROR DETECTED "  # Cleared when RX_PAR_ERR_HI/LO registers are cleared
if ((RX_PORT_STS1 & 0x02) >> 1):
    print "# PORT_PASS=1 "            # Shows current PASS status at RX Port
if ((RX_PORT_STS1 & 0x01) ):
    print "# LOCK_STS=1 "             # Shows current LOCK status at RX Port
################################################
RX_PORT_STS2 = ReadI2C(0x4E)
if ((RX_PORT_STS2 & 0x80) >> 7):
    print "# LINE_LEN_UNSTABLE DETECTED "
if ((RX_PORT_STS2 & 0x40) >> 6):
    print "# LINE_LEN_CHG "
if ((RX_PORT_STS2 & 0x20) >> 5):
    print "# FPD3_ENCODE_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x10) >> 4):
    print "# BUFFER_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x08) >> 3):
    print "# CSI_ERR DETECTED "       # Clears when CSI_RX_STS register is cleared
if ((RX_PORT_STS2 & 0x04) >> 2):
    print "# FREQ_STABLE DETECTED "
if ((RX_PORT_STS2 & 0x02) >> 1):
    print "# NO_FPD3_CLK DETECTED "
if ((RX_PORT_STS2 & 0x01) ):
    print "# LINE_CNT_CHG DETECTED "
    
################################################
# "################################################"
#  "RX3 status"
# "################################################"
WriteReg(0x4C,0x38) # RX3
PORT_ISR_LO = ReadI2C(0xDB) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_LO & 0x40) >> 6):
    print "# IS_LINE_LEN_CHG INTERRUPT DETECTED "
if ((PORT_ISR_LO & 0x20) >> 5):
    print "# IS_LINE_CNT_CHG DETECTED "
if ((PORT_ISR_LO & 0x10) >> 4):
    print "# IS_BUFFER_ERR DETECTED "
if ((PORT_ISR_LO & 0x08) >> 3):
    print "# IS_CSI_RX_ERR DETECTED "
if ((PORT_ISR_LO & 0x04) >> 2):
    print "# IS_FPD3_PAR_ERR DETECTED "  # Forward Channel parity errors exceed set threshold
if ((PORT_ISR_LO & 0x02) >> 1):
    print "# IS_PORT_PASS DETECTED "     # RX Port PASS status has changed since last read
if ((PORT_ISR_LO & 0x01) ) :
    print "# IS_LOCK_STS DETECTED "      # RX Port LOCK status has changed since last read
################################################
PORT_ISR_HI = ReadI2C(0xDA) # readout; cleared by RX_PORT_STS2
if ((PORT_ISR_HI & 0x04) >> 2):
    print "# IS_FPD3_ENC_ERR DETECTED "
if ((PORT_ISR_HI & 0x02) >> 1):
    print "# IS_BCC_SEQ_ERR DETECTED "
if ((PORT_ISR_HI & 0x01) ) :
    print "# IS_BCC_CRC_ERR DETECTED "
################################################
RX_PORT_STS1 = ReadI2C(0x4D) # R/COR
if (  (RX_PORT_STS1 & 0xc0) >> 6) == 3:
    print "# RX_PORT_NUM = RX3"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 2:
    print "# RX_PORT_NUM = RX2"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 1:
    print "# RX_PORT_NUM = RX1"
elif ((RX_PORT_STS1 & 0xc0) >> 6) == 0:
    print "# RX_PORT_NUM = RX0"
    
if ((RX_PORT_STS1 & 0x20) >> 5):
    print "# BCC_CRC_ERR DETECTED "
if ((RX_PORT_STS1 & 0x10) >> 4):
    print "# LOCK_STS_CHG DETECTED "
if ((RX_PORT_STS1 & 0x08) >> 3):
    print "# BCC_SEQ_ERROR DETECTED "
if ((RX_PORT_STS1 & 0x04) >> 2):
    print "# PARITY_ERROR DETECTED "  # Cleared when RX_PAR_ERR_HI/LO registers are cleared
if ((RX_PORT_STS1 & 0x02) >> 1):
    print "# PORT_PASS=1 "            # Shows current PASS status at RX Port 
if ((RX_PORT_STS1 & 0x01) ):
    print "# LOCK_STS=1 "             # Shows current LOCK status at RX Port
################################################
RX_PORT_STS2 = ReadI2C(0x4E)
if ((RX_PORT_STS2 & 0x80) >> 7):
    print "# LINE_LEN_UNSTABLE DETECTED "
if ((RX_PORT_STS2 & 0x40) >> 6):
    print "# LINE_LEN_CHG "
if ((RX_PORT_STS2 & 0x20) >> 5):
    print "# FPD3_ENCODE_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x10) >> 4):
    print "# BUFFER_ERROR DETECTED "
if ((RX_PORT_STS2 & 0x08) >> 3):
    print "# CSI_ERR DETECTED "       # Clears when CSI_RX_STS register is cleared
if ((RX_PORT_STS2 & 0x04) >> 2):
    print "# FREQ_STABLE DETECTED "
if ((RX_PORT_STS2 & 0x02) >> 1):
    print "# NO_FPD3_CLK DETECTED "
if ((RX_PORT_STS2 & 0x01) ):
    print "# LINE_CNT_CHG DETECTED "
################################################