OMNIVISION’s OAH0428 is a single companion chip solution that provides an integrated analog to digital conversion and limited ISP functionality including Auto White Balance (AWB), Auto Gain Control (AGC) and Auto Exposure Control (AEC), Staggered HDR and multi-frame HDR. The OAH0428 can accept 4-wire digital input, MIPI input as well as 4-wire analog input and convert it to DVP or MIPI output for signal processing.  While converting the signal, it also provides image clean-up, image resizing and manipulations including 

frame rate control, mirroring and flipping.

The OAH0428 can interface with the MIPI output from OMNIVISION’s OH08A, OH08B, OH02A, OH01A, or the 4-wire digital / analog output from OH0FA, OV6946, OH0TA, OV6948 and convert it to a MIPI / DVP signal.

 

In addition, the OAH0428 supports standard SCCB control, analog, Bayer RGB, and RAW analog inputs. During the operation, the input signals from the image sensors are digitized by and ADC and then processed by a digital signal processor (DSP) and finally standard MIPI / DVP outputs are sent out.

 

 ● automatic black level calibration (ABLC)

 ● support for the following

   ISP functions:

    - LENC

    - DPC

    - AWB

    - RAW_DNS

 ● staggered HDR

 ● programmable controls for:

     - frame rate

     - mirroring

     - windowing

 ● supports 2x2 binning, cropping, and 2x upscaling

 ● supports 4-wire analog,

     4-wire digital, Bayer RGB,

     8/10-bit RAW HDR data input

 ● supports 10-bit DVP,

     2-lane MIPI / sub-LVDS data output

 

 ● system functions:

     - auto-start (OH02B10, OH0FA10)

     - imager identification:(via sync codes for analog, sensor ID register for digital)

     - pseudo-global shutter

     - group hold

     - bypass mode

 ● 6 x 6 mm to fit into handle or at back-end, near ISP in medical endoscope and other video devices

 ● SPI master and serial camera control bus (SCCB) master/slave control interfaces

 ● security functions:

     - test pattern generation

     - embedded line data

     - frame counter

     - MBIST

 ● one-time programmable (OTP) memory

 ● autoclavable

 

 ● automatic black level calibration (ABLC)

 ● support for the following ISP functions: LENC, DPC, AWB, RAW_DNS

 ● staggered HDR

 ● programmable controls for frame rate, mirroring, and windowing

 ● supports 2x2 binning, cropping, and 2x upscaling

 ● supports 4-wire analog, 4-wire digital, Bayer RGB, 8/10-bit RAW HDR data input

 ● supports 10-bit DVP, 2-lane MIPI / sub-LVDS data output

 

 ● system functions: auto-start (OH02B10, OH0FA10), imager identification (via sync codes for analog, sensor ID register for digital), pseudo-global shutter, group hold, bypass mode

 ● 6 x 6 mm to fit into handle or at back-end, near ISP in medical endoscope and other video devices

 ● SPI master and serial camera control bus (SCCB) master/slave control interfaces

 ● security functions: test pattern generation, embedded line data, frame counter, MBIST

 ● one-time programmable (OTP) memory

 ● autoclavable

 

OAH0428-B64G-Z applications

 ● endoscopes

 ● wearables

 

 ● OAH0428-B64G-Z (lead-free) 64-pin BGA

 ● OAH0428-B64U-Z (lead-free) 64-pin BGA, tested manually

 ● power supply: 

       core: 1.1V

       I/O: 3.3V

       analog: 3.3V

 

 ● temperature range: -30°C to 70°C junction temperature

 ● package dimensions: BGA64pin,6 mm x 6 mm

 

The OAH0428 is a single chip solution for medical applications. The OAH0428 supports traditional analog medical sensors like OH0FA10, OH0TA10, OH0FA10, OH0TA10, OV6946, and OV6948. It also supports digital medical sensors like OH02B10. When the OAH0428 is combined with an analog medical sensor, it provides integrated analog-to-digital data conversion using a built-in A/D converter (ADC). When the OAH0428 is combined with a digital medical sensor, it provides a four-wire receiver that complies with the new four-wire high speed interface protocol, which is independently developed by OmniVision. The OAH0428 provides black level calibration (BLC), lens correction (LENC), auto white balance adjustment (AWB), defect pixel correction(DPC), de-noise in RAW domain (RAW_DNS), and an upscale feature to meet different frame resolution requests. It provides digital video parallel (DVP) and MIPI D-PHY high speed ports as output interface. As shown in figure 2-1, the OAH0428 provides a standard SCCB interface to communicate with the system and manipulate the above mentioned functions.

 

When combined with analog medical sensors OH0FA10/OH0TA10/OV6946/OV6948, during operation, the OAH0428 synchronizes the analog output from the medical sensors through an ADC by a predefined communication protocol. The generated digital signals will then be processed by an image signal processor (ISP). Then finally, it will output through DVP ports or MIPI D-PHY interface.

 

When combined with digital medical sensor OH02B10, during operation, the OAH0428 receives the digital output from the medical sensor through four-wire high speed interface by a predefined communication protocol. The generated digital signals will then be processed by an image signal processor (ISP). Then finally, it will output through DVP ports or MIPI D-PHY interface.

 

figure 2-1 OAH0428 medical system block diagram

 

2.1.1 OAH0428 ID and identifying sensor's revision ID

The OAH0428 chip ID can be read out through SCCB. Chip ID can be verified at {0x302A, 0x302B}.Digital medical sensor chip ID can be read out through SCCB. Sensor ID can be verified at {0x300A, 0x300B, 0x3010, 0x3011}.Analog medical sensor chip ID can be read out through SCCB. Sensor ID can be verified at {0x300A, 0x300B}.

 

The OAH0428 will automatically detect the medical sensor ID. When combined with a digital medical sensor, the OAH0428 will read the medical sensor ID through four-wire interface. When combined with an analog medical sensor, the OAH0428 will detect the medical sensor ID by measuring sync pulse width. Different analog medical sensors will have different sync pulse widths.

 

For digital medical sensor ID details, please refer to the corresponding digital medical sensor datasheet. OH0FA10 chip ID is 0xFA10, OH0TA10 chip ID is 0x6946, OV6946 chip ID is 0x6946, and OV6948 chip ID is 0x6948.

 

When sensor ID cannot be detected correctly due to a cable transmission issue, for example, the ID read out will be 0xFA1F. This only applies to analog medical sensors.

 

By default, when no sensor is connected, the ID readout from {0x300A, 0x300B} will be 0xFA1F. {0x3010, 0x3011} will be 0x0.

All of the above pictures are taken after matting the online showing, what you see is what you get.

 

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