IBASE Technology MB835, User Manual

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APPENDIX
Appendix
Bypass and WDT
The bypass function is used to link (or short) two independent Ethernet
ports when user’s application software halt or when power is off.
Block Diagram:
I/O Command
Relays are "Energized"
Normal State
Driver
Relay
Ethemet#2
Ethemet#1
Bypass
RJ45 B
Relays
RJ45 A
CN2
WDT
GPIO
Communication States:
There are two communications states for the bypass function: (1)
Normal State, (2) Bypass State. A watchdog timer (WDT) or a GPIO are
used to control and switch the communication between the two states.
The block diagram in the section above shows the Normal State, where
the two Ethernet ports work independently. The following diagram
shows the Bypass State, where the two Ethernet ports are bypassed
together.
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