370 AMD Geode™ SC2200 Processor Data Book
Electrical Specifications
32580B
9.1.4 Operating Conditions
Table 9-3 lists the various power supplies of the SC2200 and provides the device operating conditions.-
Notes:
1) All power sources except VBAT must be connected,
even if the function is not used.
2) VSB and VSBL must be on if any other voltage is
applied. VSB and VBAT voltages can be applied sepa-
rately. See Section 9.3.15 "Power-Up Sequencing" on
page 439.
3) The power planes of the SC2200 can be turned on or
off. For more information, see Section 6.2.9 "Power
Management Logic" on page 166.
4) It is recommended that the voltage difference between
VCCCRT
, VCORE and VSBL 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
VIO and VSB 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 VIH (Input High Voltage), VIL (Input Low Voltage), IOH (Output High Current), and IOL (Output Low Current) op-
erating conditions refer to Section 9.2 "DC Characteristics" on page 379.
Parameter Min Typ Max Unit Comments
TCOperating case temperature 0 - 85 oC
AVCCUSB
AVCCCRT
Analog power supply. Powers internal analog cir-
cuits and some external signals (see Table 9-4).
3.14 3.3 3.46 V
VBAT Battery supply voltage. Powers RTC and ACPI
when VBAT is greater than VSB (by at least 0.5V),
and some external signals (see Table 9-4).
2.4 3.0 3.46 V
VIO 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
VCORE Core processor and internal digital power supply. Powers internal digital logic, including internal frequency
multipliers.
233 or 266 MHz 1.71 1.8 1.89 V
300 MHz 1.99 2.1 2.21 V
VPLL2
VPLL3
PLL. Internal Phase Locked Loops (PLLs) power
supply.
3.14 3.3 3.46 V
VSB Standby power supply. Powers RTC and ACPI
when VSB is greater than VBAT
-0.5V, and some
external signals (see Table 9-4).
3.14 3.3 3.46 V
VSBL Standby logic. Powers internal logic needed to support Standby VSB. VSBL requires a 0.1 µF bypass capac-
itor to VSS.
233 or 266 MHz 1.71 1.8 1.89 V
300 MHz 1.99 2.1 2.21 V
VCCCRT CRT DAC. Powers CRT DAC digital circuits.
233 or 266 MHz 1.71 1.8 1.89 V
300 MHz 1.99 2.1 2.21 V