Student Corner
Page 16
TMS
Microprocessors Cont.
This is a high performance microprocessor with speeds up to
600MHz and the capability to support numerous peripherals. It also supports high level operating systems, such as Linux, Android™, and Window CE. The memory interfaces include up to 83MHz General Purpose
Memory Interface supporting 16-bit Wide Multiplexed Address/Data bus
and a 64Kbyte shared, volatile Static Random-Access Memory (SRAM),
and three removable media interfaces.
With such an extensive performance set-up in this microprocessor,
the infusion pump system has everything it needs to provide the best delivery system available. The microprocessor ensures that Plum A+® is
operating correctly from the time it is powered up. The 132K On-Chip
Boot ROM initializes the device and runs a system self-test to ensure the
device is working properly. Once the test is completed and no errors are
detected by the MCU (microprocessor unit), the infusion system is ready
to be programmed by the user for use on a patient.
The On Chip RAM and the SDRAM contain all the information the
pump needs to control such things such as flow rate and uniformity, and
contains the controlling programs that tell the infusion system what to do
in situation where errors are detected. Alarms are signaled and controlled
by the interaction of the different memory locations the External Peripherals Interfaces. Settings stored in the MCU that set off the alarms detect
things such as back-flow, line occlusion, improper line priming, and even
needing to change the syringe. All actions performed by the infusion system flow through the microprocessor.
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