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32581C
9.1.5.3
Definition 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 9-5 shows how these factors are controlled
when measuring the typical average and absolute maxi-
mum processor current parameters.
Table 9-5. System Conditions Used to Measure SC3200 Current During On State
CPU Current Measurement
Typical Average
Absolute Maximum
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.
Symbol
Parameter (Note 1)
I
f
= 233 MHz, I/O Current @ V
CC3ON
CLK
(Nominal); CPU state = On
f
= 266 MHz, I/O Current @ V
CLK
(Nominal); CPU state = On
I
f
= 233 MHz, Core Current @ V
COREON
CLK
1.8V (Nominal); CPU state = On
f
= 266 MHz, Core Current @ V
CLK
1.8V (Nominal); CPU state = On
I
SB Current @ V
SBON
CPU state = On
I
SBL Current @ V
SBLON
CPU state = On
SBL Current @ V
CPU state = On
Note 1. f
ratings refer to internal clock frequency.
CLK
354
V
CORE
(Note 1_
Nominal
Max
Table 9-6. DC Characteristics for On State
= 3.3V
IO
= 3.3V
IO
=
CORE
=
CORE
= 3.3V (Nominal);
SB
= 1.8V (Nominal);
SBL
= 2.0V (Nominal);
SBL
9.1.5.4
DC Current Measurements
Table 9-6 and Table 9-7 show the DC current measure-
ments of the SC3200.
System Conditions
V
DCLK
IO
(Note 1)
Frequency
Nominal
50 MHz (Note 2)
Max
135 MHz (Note 3)
Typ Avg
Abs Max
260
300
270
310
820
990
900
1090
1
2
10
20
10
20
AMD Geode™ SC3200 Processor Data Book
Electrical Specifications
SDRAM
Frequency
Nominal
Max
Unit
Comments
mA
I
for V
CC
IO
mA
I
for V
CC
CORE
mA
mA
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