GWIXP425ABCT Intel, GWIXP425ABCT Datasheet - Page 33

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GWIXP425ABCT

Manufacturer Part Number
GWIXP425ABCT
Description
Manufacturer
Intel
Datasheet

Specifications of GWIXP425ABCT

Core Operating Frequency
400MHz
Package Type
BGA
Pin Count
492
Mounting
Surface Mount
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Lead Free Status / Rohs Status
Not 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

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