STLS2F02 datasheet(10/49 Pages) STMICROELECTRONICS

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Interface description

STLS2F02

10/49

2.3

DDR2 SDRAM interface signal components

The STLS2F02 includes a built-in memory controller fully compatible with DDR2 SDRAM

industry standard (JESD79-2B). These signals include:

●

72-bit bidirectional data bus (ECC included)

●

9-bit bidirectional data strobe differential signal (ECC included)

●

9-bit data mask signal (ECC included)

●

15-bit address bus

●

7-bit bank and chip select signal

●

6-bit differential clock

●

4-bit clock enable

●

3-bit command bus

●

4-bit delay sample input/output signal

●

4-bit ODT (on die termination) signal

The STLS2F02 DDR2 SDRAM controller signals are shown in Table 3.

Table 3.

DDR2 SDRAM controller interface signals

Name

Input/output

Description

DDR2_DQ[63:0]

DDR2 SDRAM data bus

DDR2_CB[7:0]

DDR2 SDRAM data ECC data bus

DDR2_DQSp[8:0]

DDR2 SDRAM data strobe (ECC included)

DDR2_DQSn[8:0]

DDR2 SDRAM data strobe (ECC included)

DDR2_DQM[8:0]

DDR2 SDRAM data mask (ECC included)

DDR2_A[14:0]

DDR2 SDRAM address bus

DDR2_BA[2:0]

DDR2 SDRAM bank address signal

DDR2_WEn

DDR2 SDRAM write enable

DDR2_CASn

DDR2 SDRAM column select enable

DDR2_RASn

DDR2 SDRAM row select enable

DDR2_SCSn[3:0]

DDR2 SDRAM chip select

DDR2_CKE[3:0]

DDR2 SDRAM clock enable

DDR2_CKp[5:0]

DDR2 SDRAM phase clock output

DDR2_CKn[5:0]

DDR2 SDRAM phase inversion clock output

DDR2_GATEI[3:0]

DDR2 SDRAM delay sample input signal

DDR2_GATEO[3:0]

DDR2 SDRAM delay sample output signal

DDR2_ODT[3:0]

DDR2 SDRAM on die termination signal

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