101
drivers are installed. Similarly, the E2PROM is probably operating correctly if the turbo
molecular pump accumulated time is correctly calculated. EIA232 is operating correctly if
GC communications are conducted normally. ADC and DAC operation can be confirmed
on PCBs besides CPU-A.
Checking the DIP switches
CPU-A has two sets of DIP switches.
The relationship between the DIP switch settings and operating mode are shown in the table
below.
SW1 SW2 Operating mode Application
OFF OFF
MCU mode2 Not used (rewriting Flash ROM not possible)
ON OFF
User program mode Factory setting (rewriting Flash ROM possible)
OFF ON
MCU mode0 Under development
ON ON
Boot mode To rewrite Flash ROM during boot up
Normally, leave the factory setting unchanged. The Boot mode is used during manufacture
or when CPU-A cannot be rebooted due to unsuccessful rewriting of the Flash ROM.
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