AMD Geode SC3200 - Manual (Page 354)

354 AMD Geode™ SC3200 Processor Data Book
Electrical Specifications 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.
9.1.5.4 DC Current Measurements
Table 9-6 and Table 9-7 show the DC current measure-
ments of the SC3200.
Table 9-5. System Conditions Used to Measure SC3200 Current During On State
CPU Current Measurement
System Conditions
V
CORE
(Note 1_
V
IO
(Note 1)
DCLK
Frequency
SDRAM
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
I
CC3ON
f
CLK
= 233 MHz, I/O Current @ V
IO
= 3.3V
(Nominal); CPU state = On
260 300 mA I
CC
for V
IO
f
CLK
= 266 MHz, I/O Current @ V
IO
= 3.3V
(Nominal); CPU state = On
270 310
I
COREON
f
CLK
= 233 MHz, Core Current @ V
CORE
=
1.8V (Nominal); CPU state = On
820 990 mA I
CC
for V
CORE
f
CLK
= 266 MHz, Core Current @ V
CORE
=
1.8V (Nominal); CPU state = On
900 1090
I
SBON
SB Current @ V
SB
= 3.3V (Nominal);
CPU state = On
1 2 mA
I
SBLON
SBL Current @ V
SBL
= 1.8V (Nominal);
CPU state = On
10 20 mA
SBL Current @ V
SBL
= 2.0V (Nominal);
CPU state = On
10 20
Note 1. f
CLK
ratings refer to internal clock frequency.