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AMD Geode™ LX Processors Data Book 
Signal Definitions
33234H
3.2
Bootstrap Options
The bootstrap options shown in Table 3-3 are supported in
the AMD Geode LX processor for configuring the system. 
3.3
Ball Assignments
The tables in this chapter use several common abbrevia-
tions. Table 3-4 lists the mnemonics and their meanings. 
Table 3-3. Bootstrap Options
Pins
Description
IRQ13
0: Normal boot operation, TAP reset 
active during PCI reset
1: Debug stall of CPU after CPU 
reset, TAP reset active until V
IO
 valid
PW1
0: PCI (SYSREF) is 33 MHz
1: PCI (SYSREF) is 66 MHz
PW0, 
SUSPA#, 
GNT[2:0]#
Select CPU and GeodeLink system 
MHz options including a PLL bypass 
option. Refer to Table 6-87 on page 
556 f
or programming.
Table 3-4. Ball Type Definitions
Mnemonic
Definition
A
Analog
I
Input ball
I/O
Bidirectional ball
CAV
SS
Core PLL Ground ball: Analog 
CAV
DD
Core PLL Power ball: Analog
DAV
SS
DAC PLL Ground ball: Analog 
DAV
DD
DAC PLL Power ball: Analog
MAV
SS
GLIU PLL Ground ball: Analog 
MAV
DD
GLIU PLL Power ball: Analog
O
Output ball
VAV
SS
Video PLL Ground ball: Analog 
VAV
DD
Video PLL Power ball: Analog
V
CORE
Power ball: 1.2V (Nominal)
V
IO
I/O Power ball: 3.3V (Nominal)
V
MEM
Power ball: 2.5V
V
SS
Ground ball
#
The “#” symbol at the end of a signal 
name indicates that the active, or 
asserted state, occurs when the sig-
nal is at a low voltage level. When “#” 
is not present after the signal name, 
the signal is asserted when at a high 
voltage level.