Connectors: Ethernet Interface
17
JTAG Jumper
The J1 controls the way in which the Digi Connect ME 9210 JTAG device responds to pin 14 being
pulled low.
Hard Reset
The embedded modules support a hardware reset on pin 14 of the 20-pin header. Pulling pin 14 low
with an open drain driver will force the module into a hard reset state. The module will remain in the
reset state as long and pin 14 is held low and will leave this reset state ~250mS after pin 14 goes
high. Do not actively drive pin 14 high and do not allow the rise time of the pin 14 to be longer than
100uS. When used with the development board, this pin is wired to reset button SW4, which means
it acts as a hard reset button.
Jumper Result
None No reset
1-2 Hard reset
2-3 Soft reset