SC1200UFH-266 AMD (ADVANCED MICRO DEVICES), SC1200UFH-266 Datasheet - Page 108

• Manufacturer Part Number: SC1200UFH-266
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of SC1200UFH-266

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

5.5.2.6
The device is supplied from two supply voltages, as shown
in Figure 5-8:
• System standby power supply voltage, V
• Backup voltage, from low capacity Lithium battery
A standby voltage, V
supply powers the RTC under normal conditions.
Figure 5-9 represents a typical battery configuration. No
external diode is required to meet the UL standard, due to
the internal switch and internal serial resistor R
108
V
Note: Place a 0.1 μF capacitor on each V
PP
ACPI Controller
Figure 5-9. Typical Battery Configuration
RTC
Figure 5-8. Power Supply Connections
Power Supply
power supply pin as close as possible to the
pin, and also on V
V
V
PC0
V
DIGITAL
BAT
SB
RTC
Sense
V
SB
V
BAT
32579B
SB
, from the external AC/DC power
V
REF
BAT
.
V
ONCTL#
DIGITAL
V
V
BAT
V
V
R
SB
V
SBL
BAT
UL
SB
External AC Power
0.1
SB
ONCTL#
V
V
Supply
Power
DIGITAL
SB
Backup
C
Battery
C
C
μF
UL
F
F
F
SB
.
, V
0.1
0.1
SBL
BT
V
V
μF
μF
SBL
SB
1
The RTC is supplied from one of two power supplies, V
or V
parator delivers the control signals to a pair of switches.
Battery backup voltage V
saves the CMOS memory when the V
due to power failure or disconnection of the external AC/DC
input power supply or V
To assure that the module uses power from V
from V
minimum, as detailed in Section 9.0 "Electrical Specifica-
tions" on page 365.
The actual voltage point where the module switches from
V
voltage, but high enough to guarantee the correct function-
ality of the oscillator and the CMOS RAM.
Figure 5-10 shows typical battery current consumption dur-
ing battery-backed operation, and Figure 5-11 during nor-
mal operation.
BAT
Figure 5-10. Typical Battery Current: Battery
Figure 5-11. Typical Battery Current: Normal
BAT
to V
0.75
0.50
0.25
BAT
, according to their levels. An internal voltage com-
I
Note: Battery voltage in this test is 3.0V.
BAT
AMD Geode™ SC1200/SC1201 Processor Data Book
, the V
Backed Power Mode @ T
SB
10.0
(μA)
I
is lower than the minimum workable battery
7.5
5.0
BAT
2.5
3.0 3.3 3.6
SB
(μA)
voltage should be maintained above its
Operation Mode
2.4 3.0 3.6
SB
BAT
main battery.
maintains the correct time and
V
SB
BAT
C
V
(V)
voltage is absent,
SB
= 25°C
(V)
SuperI/O Module
SB
and not
SB