ETOP P/I-P3BVL, User Manual

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Chapter 2 Installations
34 P/I-P3BVL User's Manual
TD+(pin#1)
TD-(pin#2)
RD+(pin#3)
RD-(pin#5)
LAN LEDs
The LAN LEDs on top of bracket is to display the current network
connection status. The green color LED on the left-hand side shows
the link status and TX/RX activity. The Yellow color on the
right-hand side indicates the operation mode, i.e. 10Base-T or
100Base-T.
LNK/ACT STATUS
ON Link
OFF Disconnected
FLASH Packets TX/RX
SPEED MODE
ON 100Base-T
OFF 10Base-T
Watchdog Timer Configuration
The function of the watchdog timer is to reset the system
automatically and is defined at I/O port 0443H. To enable the
watchdog timer and allow the system to reset, read I/O port 0443H.
To disable the timer, read I/O port 043H for the system to stop the
watchdog function. The timer has a tolerance of 20% for its intervals.
The following describes how the timer should be programmed.
Enabling Watchdog
M O V DX, 0443H
IN AX, DX
Disabling Watchdog
M O V DX, 043H
OUT DX, AX