
386
AMD Geode SC1200/SC1201 Processor Data Book
Electrical Specifications
Revision 7.1
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 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-
3)
The power planes of the SC1200/SC1201 processor
can be turned on or off. For more information, see
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-
Parameter
Min
Typ
Max
Unit
Comments
TCASE
Operating case temperature
0
-
85
oC
AVCCUSB
AVCCCRT
AVCCTV
Analog power supply. Powers internal analog cir-
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),
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.
1.71
1.8
2.1
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
3.14
3.3
3.46
V
VSBL
Standby logic. Powers internal logic needed to
support Standby VSB.
VSBL requires a 0.1 F bypass capacitor to VSS.
1.71
1.8
2.1
V
VCCCRT
CRT DAC. Powers CRT DAC digital circuits.
1.71
1.8
2.1
V