Mindray DC-6, Service Manual

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Principle Description
3-5
At the same time the data is sent to FPGA U59 for color flow signal processing and partial
Doppler signal processing. Subsequently part of data is sent to FPGAU83 for remaining color
flow signal processing, and the other part of the data is sent to DSP U78 for remaining
Doppler signal processing. Then the B/W signal, color flow signal, Doppler signal pass the
system motherboard and are sent to the DSP board for the subsequent processing.
3.2.5 DSP board
The DSP board consists of Cine module (Cine), digital scan conversion module (DSC),
back-end display module (Display), and data capture module (Capture) and CPU system. Its
block diagram is shown as follows:
The Cine, DSC, 3D data capture and back-end display modules are designed for post
processing, and the FPGA is adopted for these functions.
The MCF5474 is used as the system CPU, to control the modules and whole system.
The functions of the modules are described as follows:
3.2.5.1
Cine module
Pre-processing of echo data
Cineloop storage and review in each mode
DDR internal memory used for Cineloop storage
The Cine and DSC modules both have 4 parallel data channels for 2-D image, M image,
Doppler image and ECG waveform.
3.2.5.2
DSC module
The DSC module is designed for conversion from echo data format to VGA data format.
3.2.5.3
Capture module
The up USB interface is used for transferring original image data to the PC platform.
The down USB interface is used for storage of 3D data calculated by the PC in the RAM.