Aaeon PCM-8150, Manual

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C o m p a c t B o a r d P C M - 8 1 5 0
Appendix B Programming the Watchdog Timer
B-4
of the key-check logic, it is necessary to perform four write
opera-tions
to the Special Address port (2EH). Two different enter keys
are provided to select configuration ports (2Eh/2Fh) of the
next
step.
(2) Modify the Data of the Registers
All configuration registers can be accessed after entering the
MB
PnP Mode. Before accessing a selected register, the content
of
Index 07h must be changed to the LDN to which the register
belongs, except some Global registers.
(3) Exit the MB PnP Mode
Set bit 1 of the configure control register (Index=02h) to 1 to
exit
the MB PnP Mode.