AMD Geode™ SC2200 Processor Data Book
73
Signal Definitions
32580B
AV
SSPLL3
AK3
GND
PLL3 Analog Ground Connection.
V
PLL2
A17
PWR
3.3V PLL2 Analog Power Connection.
Low noise power for PLL2 and
PLL5.
V
PLL3
AJ4
PWR
3.3V PLL3 Analog Power Connection.
Low noise power for PLL3,
PLL4, and PLL6.
AV
CCUSB
D27
PWR
3.3V Analog USB Power Connection.
Low noise power.
AV
SSUSB
C27
GND
Analog USB Ground Connection.
AV
CCCRT
A12, C13, D15
PWR
3.3V Analog CRT DAC Power Connections.
Low noise power.
AV
SSCRT
B14, C14, C15
GND
Analog CRT DAC Ground Connections
. Return
current.
V
CCCRT
D12
PWR
1.8V / 2.1V CRT DAC Digital Power Connection.
Can be directly con-
nected to V
CORE
on PCB (printed circuit board).
V
SSCRT
C12
GND
CRT DAC Digital Ground Connection.
Can be directly connected to V
SS
on PCB.
V
BAT
AL3
PWR
Battery.
Provides battery back-up to the RTC and ACPI registers, when
V
SB
is lower than the minimum value (see Table 9-3 on page 370). The
ball is connected to the internal logic through a series resistor for UL pro-
tection. If battery backup is not desired, connect V
BAT
to V
SS
V
SB
AL5
PWR
3.3V Standby Power Supply.
Provides power to the Real-Time Clock
(RTC) and ACPI circuitry while the main power supply is turned off.
V
SBL
AL6
PWR
1.8V / 2.1V Standby Power Supply.
Provides power to the internal logic
while the main power supply is turned off. This signal requires a 0.1
μ
F
bypass capacitor to V
SS
. This supply must be present when V
SB
is
present.
V
CORE
See Table 3-3
on page 41.
(Total of 28)
PWR
1.8V / 2.1V Core Processor Power Connections.
V
IO
See Table 3-3
on page 41.
(Total of 43)
PWR
3.3V I/O Power Connections.
V
SS
See Table 3-3
on page 41.
(Total of 92)
GND
Ground Connections.
NC
See Table 3-3
on page 41.
(Total of 8)
---
No Connections.
These lines should be left disconnected. Connecting a
pull-up/-down resistor or to an active signal could cause unexpected
results and possible malfunctions.
1.
All power sources except V
BAT
must be connected, even if the function is not used.
3.4.20
Power, Ground and No Connections
1
(Continued)
Signal Name
Ball No.
Type
Description
Summary of Contents for Geode SC2200
Page 8: ...8 AMD Geode SC2200 Processor Data Book List of Figures 32580B...
Page 16: ...16 AMD Geode SC2200 Processor Data Book Overview 32580B...
Page 70: ...74 AMD Geode SC2200 Processor Data Book Signal Definitions 32580B...
Page 350: ...366 AMD Geode SC2200 Processor Data Book Debugging and Monitoring 32580B...
Page 422: ...440 AMD Geode SC2200 Processor Data Book Electrical Specifications 32580B...