440GP – Power PC 440GP Embedded Processor
46 AppliedMicro Proprietary
Revision 1.11 – August 27, 2010
Data Sheet
Signal Functional Description (Sheet 1 of 7)
Notes:
1. Receiver input has hysteresis
2. Must pull up (recommended value is 3kΩ to 3.3V, 10kΩ to 5V)
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 to GND)
6. Strapping input during reset; pull-up (recommended value is 3kΩ to 3.3V) or pull-down (recommended value is 1kΩ to GND)
required
Signal Name Description I/O Type Notes
PCI-X Interface
PCIXAD00:63 Address/Data bus (bidirectional). I/O 3.3V PCI
PCIXC0:7[BE0:7]PCI-X Command[Byte Enables].I/O 3.3V PCI
PCIXCap Capable of PCI-X operation. I 5V tolerant
3.3V LVTTL 5
PCIX133Cap PCI-X devices are 133 MHz capable. O 3.3V PCI
PCIXClk
Provides timing to the PCI interface for PCI transactions.
Note: If the PCI-X interface is not being used, drive this pin with a
3.3V clock signal at a frequency between 1 and 66MHz
I 3.3V PCI
PCIXDevSel Indicates the driving device has decoded its address as the target
of the current access. I/O 3.3V PCI 4
PCIXFrame Driven by the current master to indicate beginning and duration of
an access. I/O 3.3V PCI 4
PCIXGnt0 Indicates that the specified agent is granted access to the bus. I/O 3.3V PCI 4
PCIXGnt1 Indicates that the specified agent is granted access to the bus. I/O 3.3V PCI 4
PCIXGnt2:5 Indicates that the specified agent is granted access to the bus. O 3.3V PCI
PCIXIDSel Used as a chip select during configuration read and write
transactions. I 3.3V PCI 5
PCIXINT Level sensitive PCI interrupt. O 3.3V PCI
PCIXIRDY Indicates initiating agent’s ability to complete the current data
phase of the transaction. I/O 3.3V PCI 4
PCIXM66En Capable of 66MHz operation. I 5V tolerant
3.3V LVTTL 5
PCIXParHigh Even parity across PCIAD32:63 and PCIXC0:3[BE4:7]. I/O 3.3V PCI
PCIXParLow Even parity across PCIAD0:31 and PCIXC0:3[BE0:3]. I/O 3.3V PCI
PCIXPErr Reports data parity errors during all PCI transactions except a
Special Cycle. I/O 3.3V PCI 4
PCIXReq0 An indication to the PCI-X arbiter that the specified agent wishes
to use the bus. I/O 3.3V PCI 4
PCIXReq1:5 An indication to the PCI-X arbiter that the specified agent wishes
to use the bus. I 3.3V PCI 4
PCIXReq64 Asserted by the current bus master, indicating a 64-bit transfer. I/O 3.3V PCI 4
PCIXAck64 Indicates the target can transfer data using 64 bits. I/O 3.3V PCI 4
PCIXReset Brings PCI device registers and logic to a consistent state. O 3.3V PCI
PCIXSErr Reports address parity errors, data parity errors on the Special
Cycle command, or other catastrophic system errors. I/O 3.3V PCI 4
PCIXStop Indicates the current target is requesting the master to stop the
current transaction. I/O 3.3V PCI 4
PCIXTRDY Indicates the target agent’s ability to complete the current data
phase of the transaction. I/O 3.3V PCI 4