User manual

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5.2.4 /RST Control Signal
The /RST pin is connected to push button switch SW1. /RST is active low. If the router needs to be reset the user can
push this switch and the router resets. After the router is reset the user should ensure that all the configuration and
status register are properly set to the desired configuration.
5.2.4.1 Manual Reset Control (SW1)
Control of this pin can be accomplished using switch SW1. pushing SW1 will reset the router
device. After the user pushes SW1 they should ensure that all the configuration and status register
are properly set to the desired configuration.
5.2.4.2 V2 Control
The /RST pin can also be controlled using the on board Virtex-2 device. /RST on the
UT200SpW4RTR device is connected to pin C7 (IO_L93P_0) on the XC2V500 in the Fine-Pitch
BGA (FG256/FGG256) package. Control of the SpW HOST interface can be achieved by writing
code for the V2 device. After the router is reset the user should ensure that all the configuration and
status register are properly set to the desired configuration.
Figure 4. UT200SpW4RTR Control Signal Locations