Revision 1.15 – August 30, 2007
440GX – Power PC 440GX Embedded Processor
Data Sheet
Signal Functional Description (Sheet 2 of 8)
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
PCIXTRDY
Description
I/O
Type
Notes
Indicates the target agent’s ability to complete the current data
phase of the transaction.
I/O
3.3V PCI
4
DDR SDRAM Interface
BA0:1
Bank Address supporting up to four internal banks.
Selects up to four external DDR SDRAM banks.
Column Address Strobe.
O
O
O
O
2.5V SSTL_2
2.5V SSTL_2
2.5V SSTL_2
2.5V SSTL_2
BankSel0:3
CAS
ClkEn0:3
Clock Enable. One for each bank.
Memory write data byte lane masks. MEMDM8 is the byte lane
mask for the ECC byte lane.
DM0:8
O
2.5V SSTL_2
2.5V SSTL_2
Byte lane data strobe. DQS8 is the data strobe for the ECC byte
lane.
DQS0:8
I/O
ECC0:7
ECC check bits 0:7.
Memory address bus.
I/O
O
2.5V SSTL_2
2.5V SSTL_2
MemAddr00:12
MemClkOut0
MemClkOut0
Subsystem clock.
O
I/O
I
2.5V SSTL_2
2.5V SSTL_2
MemData00:63
MemVRef1:2
Memory data bus.
Voltage Ref
Receiver
Memory reference voltage (SVREF) input.
RAS
Row Address Strobe.
Write Enable.
O
O
2.5V SSTL_2
2.5V SSTL_2
WE
Ethernet Interface
EMCCD,
MII: Collision detection
RMII 1: Receive error
GMII: 1000Mbps Transmit clock
RGMII: Transmit clock
TBI: Transmit clock
EMC1RxErr,
GMCGTxClk,
GMC0TxClk,
TBITxClk,
3.3V tolerant
2.5V CMOS
I/O
I/O
RTBI0TxClk
RTBI: Transmit clock
EMCCrS,
MII: Carrier sense
EMC0CrSDV,
GMCTxD7,
GMC1TxD3,
TBITxD7,
RMII 0: Carrier sense data valid
GMII: Transmit data
RGMII 1: Transmit data
TBI: Transmit data
3.3V tolerant
2.5V CMOS
RTBI1TxD3
RTBI 1: Transmit data
3.3V tolerant
2.5V CMOS
EMCMDClk
EMCMDIO
MII and RMII: Management data clock
O
MII and RMII: Transfer command and status information between
MII and PHY
3.3V tolerant
2.5V CMOS
I/O
AMCC
51
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
