GXM Datasheet, PDF (32/244 Pages) National Semiconductor (TI) – Geode™ GXm Processor Integrated x86 Solution with MMX Support

Signal Definitions (Continued)
2.2.5 Power, Ground, and No Connect Signals
Signal Name
BGA SPGA
Pin No. Pin No. Type Description
VOLDET
VSS
VCC2
VCC3
NC
AC5 AM36
Refer
to Table
2-3
(Total
of 71)
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to Table
2-3
(Total
of 32)
Refer
to Table
2-3
(Total
of 32)
--
Refer
to Table
2-5
(Total
of 50)
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to Table
2-5
(Total
of 32)
Refer
to Table
2-5
(Total
of 18)
Q5, X2,
Z2
O
GND
PWR
PWR
Voltage Detect
In early schematic revisions this pin was identified as VOLDET.
However, in the production version this pin is a "no connect" and
should be left disconnected.
Ground Connection
2.9V (nominal) Core Power Connection
3.3V (nominal) I/O Power Connection
No Connection
A line designated as NC should be left disconnected.
2.2.6 Internal Test and Measurement Signals
Signal Name
BGA SPGA
Pin No. Pin No. Type
FLT#
AC2
AJ3
I
RW_CLK
AE6
AL11
O
TEST[3:0]
TCLK
TDI
TDO
B22,
D28,
O
A23,
B32,
B21,
D26,
C21
A33
J2
P4
I
(PU)
(PU)
D2
F4
I
(PU)
(PU)
F1
J1
O
Description
Float
Float Outputs force the GXm processor to float all outputs in the
high-impedance state and to enter a power-down state.
Raw Clock
This output is the GXm processor clock. This debug signal can
be used to verify clock operation.
SDRAM Test Outputs
These outputs are used for internal debug only.
Test Clock
JTAG test clock.
This pin is internally connected to a 20-kohm pull-up resistor.
Test Data Input
JTAG serial test-data input.
This pin is internally connected to a 20-kohm pull-up resistor.
Test Data Output
JTAG serial test-data output.
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Revision 3.1