Marquette Hellige GmbH MAC 1100/1200 V 1.1 Page 16
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2.3.5 Real time clock
Since the internal Real-Time Counter Register of the MPC821 is used, no external
Real Time Clock chip is required. The internal RTC Register is buffered by the
voltage KAPWR.
2.3.6 Memory
The complete memory of the MAC1100/1200 is located on the PCB Control CS_C(I).
The software of the device can be loaded through the JTAG Port during the
production process, or for service purposes with the appropriate programming
software through the RS-232 interface.
Program Memory:
Type: Flash, + 3.3V supply
Organization: 1 Mbit x32, 4 Mbyte MAC1100: 0,5Mbit x32, 2 Mbyte
Waitstates: 1 Waitstate
DRAM:
Type: EDO DRAM, + 3.3V supply
Organization: 1 Mbit x32, 4 Mbyte
Waitstates: 0 Waitstate
Patient ECG Memory:
Type: buffered SRAM, + 3.3V supply
Organization: 256 Kbit x16, 512Kbyte MAC1100: No patient ECG memory
Waitstates: 1 Waitstate
Configuration Memory:
The configuration memory is part of the program memory Flash. With special
hardware and software protection facilities, write access to the Flash is only possible
in the defined configuration memory of the Flash. Thus an external configuration
Memory like an EEPROM is not required.
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