Hello
I've bought this thing as defective from ebay, mainly for the plasma display. It's outer case was smashed - it seemed it took a nasty fall.
The "defect" was fixed just by re-seating all boards - the fall pulled out one of the control boards, the system detected it and stopped booting.
It's quite an interesting design, with a lot of hardware and software safety features - electrical protection for the patient and software safety so it either works 100% or not at all.
This is the service manual - some design hints and full schematics. The system seems to be designed around 1990's - chip dates are from 1993 / 1992
The service manual:
http://www.frankshospitalworkshop.com/equipment/documents/ecg/service_manuals/Critikon_Dinamap_Plus_Vital_Signs_Monitor_-_Service_manual.pdfHigher resolution images:
https://drive.google.com/open?id=0B0CB5A9yU03XU0VpOUZaaTAwdVk&authuser=0I don't know how to embed an attached image, so i'll make a post for each board and include an image as large as i can attach.
The main board:
This board contains all the control logic, display signal generator and uart interface.
The interesting chips are:
MC68302 Mcu , datasheet:
http://cache.freescale.com/files/32bit/doc/ref_manual/MC68302UM.pdf - MC68000 core
- secondary communication controller ( RISC cpu )
- DRAM controller and a ton on peripherals ( ISDN voice or data terminal )
it seems to be clocked at 16Mhz
4x TC551001 - 128kB, 85nS static RAM made by Toshiba
- 2 of them are used by the MCU
- the other 2 are used by the video controller
HD63484CP98 video controller,
http://pdf.datasheetcatalog.com/datasheet_pdf/hitachi-semiconductor/HD63484-4_to_HD63484Y98.pdf - advanced CRT controller, 9.8MHz pixel clock - the display needs a 12MHz pixel clock so i don't know how it's working
- a lot of acceleration features like drawing, sprites, character generator, etc
- up to 2MB of video memory
- connected to the plasma display via 4 lines: HSync, VSync, Data, PixelClock
HN27C4096 256K*16bit UV erasable EPROM,
http://pdf.datasheetcatalog.com/datasheets/166/165230_DS.pdf - holds the code
- i'll try to read the firmware and post it here
- ceramic PLCC case, i don't recognise the manufacturer's logo
ML2009 - micro linear logarithmic gain / attenuator block
http://pdf.datasheetcatalog.com/datasheet/MicroLinearCorporation/mXuwwtw.pdf - 20 pin PLCC case
ML2036 - serial input sine wave generator with gain control
http://pdf.datasheetcatalog.com/datasheet/MicroLinearCorporation/mXqwuvw.pdf - it's near ML2009 and some op-amps, also next to the speaker connector
- they generate the audio output - this thing is loud - very loud and got a lot of acoustic signals
DS1284QN - RTC and watchdog
http://pdf.datasheetcatalog.com/datasheet_pdf/dallas-semiconductor/DS1284_to_DS1284QN.pdf - got a crystal next to it
- watchdog timer
- 50 bytes of user ram
- 0.5uA current draw from the battery input
- parallel interface
- 28 pin PLCC case
MAX172 - 12bit ADC and voltage reference
http://pdf.datasheetcatalog.com/datasheet/maxim/MAX172.pdf - SAR ADC
- parallel interface
- 10uS conversion time
MAX358 analog multiplexer
http://pdf.datasheetcatalog.com/datasheet/maxim/HI-508A-MAX359.pdf - dual supply
- some on-chip protection features: over voltage detection, etc
- it measures the power supplies and some other system voltages
MAX695 microprocessor supervisor
- voltage monitor
- power on reset generator
- watchdog timer
- battery back-up power switching
the white labelled chip might be a CPLD / FPGA glue logic - it's serial number is unreadable.
a nice Tadiran 3.7V primary cell, that is still in spec. 3.66V
The board seems to be 4 layer, only the top side is populated
there is an interesting logo etched on the bottom side, under the battery : an 'atom' symbol with 'FCC02" inside, like this one:
http://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Schematicy-atom.svg/683px-Schematicy-atom.svg.png