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Theory of Operation
Overview / Block Diagram
Revision E
Equipment Overview: Theory of Operation
The MAC 5500 CPU board contains all of the circuitry for the MAC 5500 resting
ECG analysis system except for the line power supply, acquisition module,
keyboard and display. Although the MAC 5500 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. Component references in this
section are relative to the 801212-007 CPU board assembly.
The CPU board assembly 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 LAN and modem.
Switch Mode Power Supplies
3.3 Volt for Logic, LCD
5 Volt for Logic, Printer
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)
Atmel AT91RM9200 CPU Containing:
Incorporates the ARM920T
-
200 MIPS at 180 MHz, Memory Management Unit
-
16-KByte Data Cache, 16-KByte Instruction Cache, Write Buffer
-
In-circuit Emulator including Debug Communication Channel
-
Mid-level Implementation Embedded Trace Macrocell (256-ball BGA
Package Only)
Low Power: 30.4 mA on VDDCORE, 3.1 mA in Standby Mode
Additional Embedded Memories
-
16K Bytes of SRAM and 128K Bytes of ROM
MAC 5500 resting ECG analysis system
2020299-020
ARM® Thumb
Processor
2-7
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