32581C

Electrical Specifications

9.1.5.3Definition of System Conditions for Measuring On Parameters

The SC3200’s current is highly dependent on two func- tional characteristics, DCLK (DOT clock) and SDRAM fre- quency. Table 9-5shows how these factors are controlled when measuring the typical average and absolute maxi- mum processor current parameters.

9.1.5.4DC Current Measurements

Table 9-6and Table 9-7show the DC current measure- ments of the SC3200.

Table 9-5. System Conditions Used to Measure SC3200 Current During On State

 

 

System Conditions

 

 

 

 

 

 

 

VCORE

VIO

DCLK

SDRAM

CPU Current Measurement

(Note 1_

(Note 1)

Frequency

Frequency

 

 

 

 

 

Typical Average

Nominal

Nominal

50 MHz (Note 2)

Nominal

 

 

 

 

 

Absolute Maximum

Max

Max

135 MHz (Note 3)

Max

 

 

 

 

 

Note 1. See Table 9-3 on page 352 for nominal and maximum voltages.

Note 2. A DCLK frequency of 50 MHz is derived by setting the display mode to 800x600x8 bpp at 75 Hz, using a display image of vertical stripes (4-pixel wide) alternating between black and white with power management disabled.

Note 3. A DCLK frequency of 135 MHz is derived by setting the display mode to 1280x1024x8 bpp at 75 Hz, using a display image of vertical stripes (1-pixel wide) alternating between black and white with power management disabled.

Table 9-6. DC Characteristics for On State

Symbol

Parameter (Note 1)

Typ Avg

Abs Max

Unit

Comments

 

 

 

 

 

 

ICC3ON

fCLK = 233 MHz, I/O Current @ VIO = 3.3V

260

300

mA

ICC for VIO

 

(Nominal); CPU state = On

 

 

 

 

 

 

 

 

 

 

 

fCLK = 266 MHz, I/O Current @ VIO = 3.3V

270

310

 

 

 

(Nominal); CPU state = On

 

 

 

 

 

 

 

 

 

 

ICOREON

fCLK = 233 MHz, Core Current @ VCORE =

820

990

mA

ICC for VCORE

 

1.8V (Nominal); CPU state = On

 

 

 

 

 

 

 

 

 

 

 

fCLK = 266 MHz, Core Current @ VCORE =

900

1090

 

 

 

1.8V (Nominal); CPU state = On

 

 

 

 

 

 

 

 

 

 

ISBON

SB Current @ VSB = 3.3V (Nominal);

1

2

mA

 

 

CPU state = On

 

 

 

 

 

 

 

 

 

 

ISBLON

SBL Current @ VSBL = 1.8V (Nominal);

10

20

mA

 

 

CPU state = On

 

 

 

 

 

 

 

 

 

 

 

SBL Current @ VSBL = 2.0V (Nominal);

10

20

 

 

 

CPU state = On

 

 

 

 

 

 

 

 

 

 

Note 1. fCLK ratings refer to internal clock frequency.

354

AMD Geode™ SC3200 Processor Data Book

Page 354
Image 354
AMD SC3200 manual DC Characteristics for On State