Revision 1.23 - Sept 26, 2006
Data Sheet
PowerPC 440SP Embedded Processor
Table 6. Signal Functional Description (Sheet 7 of 7)
Notes:
1. Receiver input has hysteresis
2. Must pull up (recommended value is 3kΩ to 3.3V)
3. Must pull down (recommended value is 1kΩ)
4. If not used, must pull up (recommended value is 3kΩ to 3.3V)
5. If not used, must pull down (recommended value is 1kΩ)
6. Strapping input during reset; pull-up or pull-down required
Signal Name
Description
I/O
Type
Notes
Power
AxGND
Analog ground.
na
na
Analog voltage—1.5V.
Filtered voltages input for PCI PLLs (analog circuits).
APxVDD
na
na
na
na
Note:A separate filter for all analog voltages is
recommended.
Analog voltage—1.5V.
Filtered voltages input for system PLLs (analog circuits).
AxVDD
Note:A separate filter for all analog voltages is
recommended.
GND
Logic and I/O ground.
na
na
na
na
OVDD
I/O supply (except DDR SDRAM and PCI-X)— 3.3V.
PCI-X I/O voltage supply.
PxVDD
SVDD
na
na
Note:PCI-X operates at 3.3V.
PCI-X 266 DDR operates at 1.5V
DDR SDRAM I/O voltage supply.
na
na
na
na
Note:DDR SDRAM operates at 2.5V
DDR2 SDRAM operates as 1.8V
VDD
Logic voltage supply—1.5V.
PSRO
Performance Screen Ring Oscillator.
PSRO
na
na
na
na
Note:All PSRO signals should be connected to logic
ground (GND).
Reserved
Do not connect voltage, ground, or any signals to these
pins.
Reserved
62
AMCC Proprietary
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
