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No. 2D730-148E*O
W SC
This consists of the one SC-ASK, a CINE memory, and a buffer memory.
SC
operates in the 2D and CDI modes and performs the following 2D image system
processing operations.
l
Scan conversion
Ultrasound data is converted to TV format data
l
Tissue/flow decision
Whether the pixels displayed in CDI mode represent tissue or blood flow is
determined.
l
Peak hold (only for CDI mode)
A maximum value is displayed for each pixel in CDI mode.
l
Frame interpolation
(only for CDI mode)
Frame interpolation
processing is performed
in CDI mode
l
2D tine storage
Holds the 256 MB tine memory.
l
Cine replay (under CPU control)
Cine display is pet-formed.
Operations such as playback speed are controlled by
the CPU.
(f)
PCI I/F
This function interfaces the HOST bus (PCI bus) and the following buses.
l
Imaging bus
Data bus to be sent to the VI board. The imaging bus includes the 32-bit bus from
the SC and the 18bit bus from the SIP. The bus clock for both buses is 40 MHz.
l
BE internal local bus
Internal local bus used for controlling each ASIC. This bus operates at 40 MHz
with a 32-bit width.
l
FE bus
The FE bus is used by the CPU to access boards in the FE unit. This bus operates
at 40 MHz with a 32-bit width.
(3)
Flow of signals
The flow of signals for each mode is shown on the next and subsequent
pages.
4-27
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