PRIXP422ABB Intel, PRIXP422ABB Datasheet - Page 33

• Manufacturer Part Number: PRIXP422ABB
• Description: Network Proc 1.3V/3.3V 266MHz 492-Pin BGA
• Manufacturer: Intel

Specifications of PRIXP422ABB

• Package: 492BGA
• Core Operating Frequency: 266 MHz
• Operating Supply Voltage: 1.3|3.3 V
• Package Type: BGA
• Pin Count: 492
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

Functional Signal Descriptions
Table 7.
June 2007
33
SDRAM Interface
SDM_ADDR[12:0]
SDM_DATA[31:0]
SDM_CLKOUT
SDM_BA[1:0]
SDM_RAS_N
SDM_CAS_N
SDM_CS_N[1:0]
SDM_WE_N
SDM_CKE
SDM_DQM[3:0]
†
Name
For a legend of the Type codes, see
Power
or Sys
Reset
Reset
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Reset
Post
0
1
0
0
1
1
1
1
1
0
Type
I/O
O
O
O
O
O
O
O
O
O
†
Table 5 on page
SDRAM Address: A0-A12 signals are output during the READ/WRITE commands and ACTIVE commands to
select a location in memory to act upon.
SDRAM Data: Bidirectional data bus used to transfer data to and from the SDRAM
SDRAM Clock: All SDRAM input signals are sampled on the rising edge of SDM_CLKOUT. All output signals are
driven with respect to the rising edge of SDM_CLKOUT.
SDRAM Bank Address: SDM_BA0 and SDM_BA1 define the bank the current command is attempting to access.
SDRAM Row Address strobe/select (active low): Along with SDM_CAS_N, SDM_WE_N, and SDM_CS_N signals
determines the current command to be executed.
SDRAM Column Address strobe/select (active low): Along with SDM_RAS_N, SDM_WE_N, and SDM_CS_N
signals determines the current command to be executed.
SDRAM Chip select (active low): CS# enables the command decoder in the external SDRAM when logic low and
disables the command decoder in the external SDRAM when logic high.
SDRAM Write enable (active low): Along with SDM_CAS_N, SDM_RAS_N, and SDM_CS_N signals determines
the current command to be executed.
SDRAM Clock Enable: CKE is driving high to activate the clock to an external SDRAM and driven low to de-
activate the CLK to an external SDRAM.
SDRAM Data bus mask: DQM is used to byte select data during read/write access to an external SDRAM.
30.
Intel
®
IXP45X and Intel
Description
®
IXP46X Product Line of Network Processors Datasheet
Document Number:
252479-007US