MAIN Board For Nihon Kohden BSM 2301

MAIN BOARD FOR PATIENT MONITOR NIHON KOHDEN BSM-2301 

The MAIN board consists of system control block, display control block, DPU block and power control block.

The system control block has the host CPU which controls the peripherals to receive in the operation key status and display the wareforms and numeric data. The program is stored in the 2 MB system ROM (flash EEPROM) for CPU on the REC MAIN board of the optional recorder module. 

When the instrumentis turned on, the host CPU executes the program in the Boot ROM. According to the program, the host CPU checks if the program card is inserted in to the slot on the MAIN board. When the host CPU recognizes that the correct program card is inserted, the host  CPU writes the program from the card to each system ROM. This is called Boot. Therefore , this Boot system allows you to upgrade the instrument without opening it. On the other hand, when the  program card is not insterted into the slot, the host CPU switches from the Boot ROM to the System ROM on the MAIN board and executes the system program.

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