STLS2F02 datasheet(24/49 Pages) STMICROELECTRONICS

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DDR2 SDRAM controller interface description

STLS2F02

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4.4.2

Parameter descriptions

CONF_CTL_00 AP

The parameter determines whether the auto pre-charge function is enabled. If the function

is enabled, memory closes the page after each write/read instruction. If mass continuous

address operation happens, setting this parameter causes performance degradation.

CONF_CTL_00 CONCURRENTAP

This parameter determines whether the concurrent auto pre-charge function is enabled.

Most SDRAM vendors do not support this feature.

CONF_CTL_03 SREFRESH

This parameter sets the self refresh style. It must be set to 0 when returning from self

refresh.

CONF_CTL_07 CASLAT_LIN_GATE

This parameter controls the data sample of the memory controller when a read operation

returns. In general, It is equal to or less than half period of ACALAT_LIN. The value of

CASLAT_LIN is twice that of CAS.

CONF_CTL_15 DLL_INCREMENT

This parameter should not be set 0.

CONF_CTL_15 DLL_START_POINT

This parameter should not be set to 0 or 1 and should be less than 1.5 times the

DLL_LOCK_VALUE.

CONF_CTL_28 UB_DIMM

This parameter should be set to 1, when unbuffered DIMM(s) are used. It should be set 0

when SDRAM(s) are used.

STLS2F02 数据表(PDF) 24 Page - STMicroelectronics