GX3202 Datasheet, PDF (35/49 Pages) Semtech Corporation – Crosspoint Switch with Trace Equalization and Output De-emphasis

4.11 Device Reset
The RESET pin is an active-LOW asynchronous reset for the device. Assertion of the
RESET pin sets the device in its minimum power state. The minimum pulse width of the
RESET signal is 10ms (t_reset). There is a 50μs delay (t_idle) between the RESET signal going
HIGH (inactive) and the device becoming operational. During this time (all of t_reset +
t_idle), there should be no host interface activity and the UPDATE_EN[7:0] pins must be
held LOW.
NOTE 1: RESET must be held LOW until all power supplies have stabilized.
NOTE 2: Upon emerging from reset, all SDI inputs and SDO outputs are powered-down,
pattern generation and checking is inactive, and all registers assume their reset values
as noted in the Semtech Crosspoint (GX3290 and family) Reference Manual (for CSRs).
RESET
t_reset
t_idle
Reset Timing Diagram
GX3202 202 x 202 3.5Gb/s Crosspoint
Data Sheet
56077 - 1
October 2012
35 of 49
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