SC3200 datasheet(86/447 Pages) AMD

86 / 447 page

AMD Geode™ SC3200 Processor Data Book

Signal Definitions

Revision 5.1

3.4.20

Power, Ground and No Connections1

Signal Name

Ball No.

Type

Description

EBGA

TEPBGA

AVSSPLL2

C16

GND

Analog PLL2 Ground Connection.

AVSSPLL3

E28

AK3

GND

Analog PLL3 Ground Connection.

VPLL2

A17

PWR

3.3V PLL2 Analog Power Connection. Low noise

power for PLL2 and PLL5.

VPLL3

C31

AJ4

PWR

3.3V PLL3 Analog Power Connection. Low noise

power for PLL3, PLL4, and PLL6.

AVCCUSB

AF4

D27

PWR

3.3V Analog USB Power Connection. Low noise

power.

AVSSUSB

AG1

C27

GND

Analog USB Ground Connection.

VBAT

D30

AL3

PWR

Battery. Provides battery back-up to the RTC and

ACPI registers, when VSB is lower than the minimum

value (see Table 9-3 on page 370). The ball is con-

nected to the internal logic through a series resistor for

UL protection. If battery backup is not desired, connect

VBAT to VSS.

VSB

F29

AL5

PWR

3.3V Standby Power Supply. Provides power to the

Real-Time Clock (RTC) and ACPI circuitry while the

main power supply is turned off.

VSBL

H28

AL6

PWR

1.8V Standby Power Supply. Provides power to the

internal logic while the main power supply is turned off.

This signal requires a 0.1

µF bypass capacitor to V

SS.

This supply must be present when VSB is present.

VCORE

SeeTable 3-3

on page 38.

(Total of 26)

See Table 3-5

on page 54.

(Total of 29)

PWR

1.8V Core Processor Power Connections.

VIO

See Table 3-3

on page 38.

(Total of 35)

See Table 3-5

on page 54.

(Total of 46)

PWR

3.3V I/O Power Connections.

VSS

See Table 3-3

on page 38.

(Total of 61)

See Table 3-5

on page 54.

(Total of 96)

GND

Ground Connections.

See Table 3-3

on page 38.

(Total of 13)

See Table 3-5

on page 54.

(Total of 13)

---

No Connections. These lines should be left discon-

nected. Connecting a pull-up/-down resistor or to an

active signal could cause unexpected results and pos-

sible malfunctions.

All power sources except VBAT must be connected, even if the function is not used.

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