GX1 Datasheet, PDF (188/247 Pages) National Semiconductor (TI) – Processor Series Low Power Integrated x86 Solution

Electrical Specifications (Continued)
6.2.2 NC-Designated Pins
Pins designated NC (No Connection) should be left discon-
nected. Connecting an NC pin to a pull-up/-down resistor,
or an active signal could cause unexpected results and
possible circuit malfunctions.
6.2.3 Pull-Up and Pull-Down Resistors
Table 6-2 lists the input pins that are internally connected to
a weak (>20-kohm) pull-up/-down resistor. When unused,
these inputs do not require connection to an external pull-
up/-down resistor.
6.2.4 Unused Input Pins
All inputs not used by the system designer and not listed in
Table 6-2 should be kept at either ground or V_CC3. To pre-
vent possible spurious operation, connect active-high
inputs to ground through a 20-kohm (±10%) pull-down resis-
tor and active-low inputs to V_CC3 through a 20-kohm
(±10%) pull-up resistor.
Table 6-2. Pins with > 20-kohm Internal Resistor
Signal Name
BGA Ball No.
PU/PD
SUSP#
FRAME#
IRDY#
TRDY#
STOP#
LOCK#
DEVSEL#
PERR#
SERR#
REQ[2:0]#
TCLK
TMS
TDI
TEST
H2
A8
C9
B9
C11
B11
A9
A11
C12
D3, H3, E3
J2
H1
D2
F3
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-down
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