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EQUIPMENT OVERVIEW: Theory of Operation
Revision A
DASH 2000 Patient Monitor
2-23
2000 412-001
Main Memory
ConÞguration
The main memory consists of 4 megabytes of electrically erasable
FLASH memory and 512 Kbyte backed static RAM. All main memory
runs at full speed with one wait-states being inserted. The FLASH
memory is sector erasable so no separate boot memories are provided
(i.e., the main code sectors may be erased without erasing the boot
sectors).
Program Memory
(FLASH)
The electrically erasable FLASH memory allows the monitor to receive
software updates either from a AutoPort or from the network. The
FLASH devices used on this board are state-of-the-art components which
store 16 megabit per device. Considerable board area is saved by using
these devices since only two are required. Physically, the devices reside
directly on the local bus of the 821.
Data Memory (SRAM)
Data memory consists of 512 Kbyte of static RAM (SRAM) operating
with three wait states. All SRAM is backed up using a gold capacitor.
Check of the buffered voltage is performed upon power-up.
LEDs
The LED 1 to 3 are used as operating status indicator. LED 4 is only
used as reference element.
Содержание marquette Dash 2000
Страница 12: ...Contents viii DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 82: ...Maintenance Repair Log 3 36 DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 156: ...UPPER LEVEL ASSEMBLY Spare Parts List 7 10 DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 157: ...Revision A DASH 2000 Patient Monitor 8 1 2000 412 001 8 ASSEMBLY DRAWINGS Contents ...
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