MPC8280 datasheet(461/1386 Pages) FREESCALE

Part #	MPC8280

Description	PowerQUICC??II Family Reference Manual

PDF	1386 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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461 / 1386 page

Memory Controller

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

11-41

11.4.6.4

Last Data Out to Precharge

As shown in Figure 11-23, this parameter, controlled by P/LSDMR[LDOTOPRE], defines the earliest

timing for the PRECHARGE command after the last data was read from the SDRAM. It is always related to

the CL parameter.

Figure 11-23. LDOTOPRE = 2 (–2 Clock Cycles)

11.4.6.5

Last Data In to Precharge—Write Recovery

As demonstrated in Figure 11-24, this parameter, controlled by P/LSDMR[WRC], defines the earliest

timing for PRECHARGE command after the last data was written to the SDRAM.

Figure 11-24. WRC = 2 (2 Clock Cycles)

CLK

ALE

SDRAS

SDCAS

MA[0–11]

Row

Column

Data

Activate

Read

Deactivate

Last Data Out

LDOTOPRE = 2

DQM

CLK

ALE

SDRAS

SDCAS

MA[0–11]

Row

Column

Data

Activate

WRITE

Last data in

Deactivate

WRC = 2

DQM

MPC8280 Datasheet(PDF) 461 Page - Freescale Semiconductor, Inc

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