Digi NS7520 User Manual

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2 5

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This figure shows the timing and specification for RESET_ rise/fall times:

PLLTST_, BISTEN_, and SCANEN_ primary inputs control different test modes for both 
functional and manufacturing test operations. See Chapter 5, "SYS Module," for more 
information.

tR max = 18ns
Vin = 0.8V to 2.0V

tF max = 18ns
Vin = 2.0V to 0.8V

tF

tR

PLLTST_

N15

I

Encoded with BISTEN_ and SCANEN_
Add an external pullup to 3.3V or 
pulldown to GND.

BISTEN_

M15

I

Encoded with PLLTST_ and SCANEN_
Add an external pullup to 3.3V or 
pulldown to GND.

SCANEN_

L13

I

Encoded with BISTEN_ and PLLTST_
Add an external pullup to 3.3V or 
pulldown to GND.