Aaeon EMB-852T User Manual page 48

M i n i - I T X
are to be performed during Wait for Key state. To ensure the
initial state of the key-check logic, it is necessary to perform
four write operations to the Special Address port (2EH). Two
different enter keys are provided to select configuration ports
(2Eh/2Fh) of the next step.
87h, 01h, 55h, 55h:
(2) Modify the Data of the Registers
All configuration registers can be accessed after entering the
MBPnP 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.
WatchDog Timer Configuration Registers
LDN Index R/W Reset Configuration Register or Action
ALL 02H W
07H 71H R/W 00H WatchDog Timer Control Register
07H 72H R/W 00H WatchDog Timer Configuration Register
07H 73H R/W 00H WatchDog Timer Time-out Value Register
Appendix A Programming the Watchdog Timer
Address Port
2Eh
N/A Configure
A-4
E M B - 8 5 2 T
Data Port
2Fh
Control