Aaeon EMB-900M, Руководство пользователя

Страница: 42 / 53

M i c r o A T X B o a r d E M B - 9 0 0 M
Appendix A Programming the Watchdog Timer
A - 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.