GE Voluson P8 BT16 Basic Service Manual page 234

GE RAFT
DIRECTION 5723243, R
5-3-3-1 DRFM - FPGA
A.) Beamformer interface
• LVDS-interface
• Raw ultrasound data is transferred from the Beamformer to the Interface FPGA.
• Configuration data (Probe Setup data, Beam Setup data) is transferred from the Interface FPGA to
the Beamformer.
• FPGA configuration data is transferred from the Interface FPGA to the Beamformer
B.) DMA Logic
• Receives pre-processed ultrasound data coming from the Processing FPGA.
• Stores this data in the Line Memory buffer (2x SDRAM)
• Transfers buffered data by DMA-transfer via PCI and PCI-Express to the PC
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C.) T-DPI FPGA programming interface
• This FPGA is the interface between the System connectors and the DRFM.
D.) Ultrasound Data Pre-processing
• Raw ultrasound data is coming in from the Interface FPGA. It is pre-processed.Further processing
will be done by the PC. The pre-processed data is transferred back to the Interface-FPGA.
E.) System control
• PRF (Pulse Repetition Frequency) Generator
• Line Number (Lateral Position)
• Control of TX-Power DACs (generation of TX POWER reference voltage)
• Controls discharge of capacity on DPS board during the reduction of TX POWER
• Shut-down signal coming from the DBM64 board is passed to the SOM
• Probe Select signals, which indicate that a probe is connected to a probe connector.
• Probe Code Interface: The Probe Code can be read from a connected probe, or a new code can be
written into the probe..
• Audio Control:
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F.) 4D motor control
• Master of Control for 3D-Sweep
• Master of Control for 4D-Sweeps
• Generation of Volume Trigger and Frame Trigger (for 4D)
• Drives motor (in 3D/4D-probes) via SIN (sine-signal) & COS (cosine signal)
• The HALL-signal coming from the 3D/4D probe is passed to the DSP for zero position detection.
5-26
6 DRAFT (M
EVISION
Non-TimeMotion data (B, C): DMA0
TimeMotion data (M, PW): DMA1.
PW Doppler Audio Output for buffered signals from the PC
Section 5-3 - FrontEnd Processor
23, 2018)
AY
V ™ P8 / V
OLUSON OLUSON
B S M
ASIC ERVICE
™ P6
ANUAL