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4 operating conditions, Table 9-3, Operating conditions – AMD Geode SC1201 User Manual

Page 366

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366

AMD Geode™ SC1200/SC1201 Processor Data Book

Electrical Specifications

32579B

9.1.4

Operating Conditions

Table 9-3 lists the various power supplies of the SC1200/SC1201 processor and provides the device operating conditions.

Notes:

1)

All power sources except V

BAT

must be connected,

even if the function is not used.

2)

V

SB

and V

SBL

must be on if any other voltage is

applied. V

SB

and V

BAT

voltages can be applied sepa-

rately. See Section 9.3.16 "Power-Up Sequencing" on
page 433.

3)

The power planes of the SC1200/SC1201 processor
can be turned on or off. For more information, see
Section 6.2.9 "Power Management Logic" on page
158.

4)

It is recommended that the voltage difference between
V

CCCRT

, V

CORE

and V

SBL

be less than 0.25V, in order

to reduce leakage current. If the voltage difference
exceeds 0.25V, excessive leakage current is used in
gates that are connected on the boundary between
voltage domains.

5)

It is recommended that the voltage difference between
V

IO

and V

SB

be less than 0.25V, in order to reduce

leakage current. If the voltage difference exceeds
0.25V, excessive leakage current is used in gates that
are connected on the boundary between voltage
domains.

Table 9-3. Operating Conditions

Symbol
(Note 1)

Note 1. For V

IH

(Input High Voltage), V

IL

(Input Low Voltage), I

OH

(Output High Current), and I

OL

(Output Low Current) op-

erating conditions refer to Section 9.2 "DC Characteristics" on page 371.

Parameter

Min

Typ

Max

Unit

Comments

T

CASE

Operating case temperature

0

-

85

o

C

AV

CCUSB

AV

CCCRT

AV

CCTV

Analog power supply. Powers internal analog cir-
cuits and some external signals (see Table 9-4).

3.14

3.3

3.46

V

V

BAT

Battery supply voltage. Powers RTC and ACPI
when V

BAT

is greater than V

SB

(by at least 0.5V),

and some external signals (see Table 9-4).

2.4

3.0

3.46

V

V

IO

I/O buffer power supply. Powers most of the
external signals (see Table 9-4); certain signals
within this power plane are 5V tolerant.

3.14

3.3

3.46

V

V

CORE

Core processor and internal digital power supply.
Powers internal digital logic, including internal
frequency multipliers.

1.71

1.8

2.1

V

V

PLL2

V

PLL3

PLL. Internal Phase Locked Loops (PLLs) power
supply.

3.14

3.3

3.46

V

V

SB

Standby power supply. Powers RTC and ACPI
when V

SB

is greater than V

BAT

-0.5V, and some

external signals (see Table 9-4).

3.14

3.3

3.46

V

V

SBL

Standby logic. Powers internal logic needed to
support Standby V

SB

.

V

SBL

requires a 0.1 µF bypass capacitor to V

SS

.

1.71

1.8

2.1

V

V

CCCRT

CRT DAC. Powers CRT DAC digital circuits.

1.71

1.8

2.1

V

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