Theory Of Operation; Overview / Block Diagram - GE MAC 5000 Service Manual

Theory of Operation

Overview / Block Diagram

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Equipment Overview: Theory of Operation
The MAC 5000 CPU board contains all of the circuitry for the MAC 5000
electrocardiograph except for the line power supply, acquisition module,
keyboard and display. Although MAC 5000 runs software derived from
products based on the Max-1 architecture (running on the C-Exec
operating system), it has almost nothing in common with that hardware
family.
In a nutshell, the board contains the following:
64 MB SDRAM (holds both code and data)
32 MB SDRAM acts as video frame memory
32 MB NAND Flash (holds FPGA configuration and system code)
32 MB NAND Flash for ECG Record storage
128 KB Boot Data Flash (holds primary boot image)
CRT video DACs
External 12 Volt Power Switch
Acquisition Module Transceiver / Power Switch
Printhead Power Switches and Pixel Test Circuit
Daughter Board Interface which support serial ports, USB and
PC card.
Switch Mode Power Supplies
3.3 Volt for Logic, LCD
5 Volt for Logic, Printer, Floppy Drive
12 Volt for LCD backlight, External Com Port Power
Battery Charger
-12 Charge Pump for Analog Circuits
Linear Power Supplies
1.8 Volt (AT91RM9200 Core and FPGA Core)
2.5 Volt Reference
3.3 Volt for System Supervisor (Moe Stooge)
12 Volt for Analog Circuits
Crystals / Clocks
24 MHz Oscillator for FPGA
32.768 Khz Real Time Clock for Super IO chip.
32.768 Khz (AT91RM9200)
18.432 Mhz (AT91RM9200)
4 Mhz (3 devices, 1 for each Stooge)
MAC™ 5000 resting ECG analysis system
2024917-010
Revision B