GXM datasheet(32/244 Pages) NSC

32 / 244 page

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Revision 3.1

Signal Definitions (Continued)

2.2.5

Power, Ground, and No Connect Signals

Signal Name

BGA

Pin No.

SPGA

Pin No.

Type

Description

VOLDET

AC5

AM36

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.

VSS

Refer

to Table

2-3

(Total

of 71)

Refer

to Table

2-5

(Total

of 50)

GND

Ground Connection

VCC2

Refer

to Table

2-3

(Total

of 32)

Refer

to Table

2-5

(Total

of 32)

PWR

2.9V (nominal) Core Power Connection

VCC3

Refer

to Table

2-3

(Total

of 32)

Refer

to Table

2-5

(Total

of 18)

PWR

3.3V (nominal) I/O Power Connection

Q5, X2,

No Connection

A line designated as NC should be left disconnected.

2.2.6

Internal Test and Measurement Signals

Signal Name

BGA

Pin No.

SPGA

Pin No.

Type

Description

FLT#

AC2

AJ3

Float

Float Outputs force the GXm processor to float all outputs in the

high-impedance state and to enter a power-down state.

RW_CLK

AE6

AL11

Raw Clock

This output is the GXm processor clock. This debug signal can

be used to verify clock operation.

TEST[3:0]

B22,

A23,

B21,

C21

D28,

B32,

D26,

A33

SDRAM Test Outputs

These outputs are used for internal debug only.

TCLK

(PU)

Test Clock

JTAG test clock.

This pin is internally connected to a 20-kohm pull-up resistor.

TDI

(PU)

Test Data Input

JTAG serial test-data input.

This pin is internally connected to a 20-kohm pull-up resistor.

TDO

Test Data Output

JTAG serial test-data output.

GXM Datasheet(PDF) 32 Page - National Semiconductor (TI)

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