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SC 7000 and SC 9000XL Patient Monitors
32
32
16
DSP
Front
Serial
End
CH A & B
Bus
16
32
16
16
DSP
Serial
CH C & D
16
Figure 2-6
POD Communications
5 POD COM
Subsystem
5.1 Overview
ASK-T898-03-7600
7k9kXLTM.c2.CD_ROM.fm/04-99/kaupp
Common RAM
Memory Buffers
Channel A
Channel B
Data In
Data In
Data Out
Data Out
Main FPGA
DMA
Channel A
M
U
X
DMA
Channel B
DMA
Channel C
M
U
X
DMA
Channel D
A pod is a front end device that acquires data for a particular set of
parameters. A pod may contain a processor and return preprocessed data
or it may provide raw A/D samples.
Refer to
Figure
Data acquisition of the monitor is controlled by several DMA controllers that
operate on circular buffers residing in common memory on the FRONT
END bus. There are four channels, each allocated a 16 bit transmit buffer
and a 16 bit receive buffer. It takes four 32 bit transfers to update one
location in every buffer, since each access consists of high and low data
from different channels. The transmit buffer tells the pod either what sample
to take or to change a control setting. The receive buffer contains a/d
samples and status information from the pod. A control register in the FPGA
sets a mux to the DSP's communication port and connects the selected pod
com channel.
Siemens Medical Systems, EM-PCS Danvers
NOT A CONTROLLED DOCUMENT
Channel C
Channel D
Data In
Data In
Data Out
Data Out
64K Samples/sec
Pod
64K Samples/sec
Com
64K Samples/sec
Pod
64K Samples/sec
Com
64K Samples/sec
Pod
64K Samples/sec
Com
64K Samples/sec
Pod
64K Samples/sec
Com
(16 bit Samples)
2-6.
Service Manual
Pod Com
M
Isolation
U
Pod Com
X
Isolation
Cartridge
Interface
Cartridge
Pod Com
Isolation
Pod Com
Isolation
MultiMed
Front End
HemoMed
Front End
etCO
2
Pod 1
Pod 2
15
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