Digi NS7520 User Manual
w w w . d i g i . c o m
2 5
P i n o u t a n d P a c k a g i n g
This figure shows the timing and specification for RESET_ rise/fall times:
System mode (test support)
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.
functional and manufacturing test operations. See Chapter 5, "SYS Module," for more
information.
tR max = 18ns
Vin = 0.8V to 2.0V
Vin = 0.8V to 2.0V
tF max = 18ns
Vin = 2.0V to 0.8V
Vin = 2.0V to 0.8V
tF
tR
Symbol
Pin
I/O
OD
Description
PLLTST_
N15
I
Encoded with BISTEN_ and SCANEN_
Add an external pullup to 3.3V or
pulldown to GND.
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.
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.
Add an external pullup to 3.3V or
pulldown to GND.
Table 12: System mode and system reset pinout