PCIMX258CJM4A datasheet(61/144 Pages) FREESCALE

No de pièce	PCIMX258CJM4A

Description	i.MX25 Applications Processor for Consumer and Industrial Products

PDF	144 Pages

Scroll/Zoom	100%

Fabricant	FREESCALE [Freescale Semiconductor, Inc]

Site Internet	http://www.freescale.com

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i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 3

Freescale Semiconductor

3.7.6.1.2

Mobile DDR SDRAM–Specific Parameters

The following diagrams and tables specify the timings related to the SDRAMC module which interfaces

with the mobile DDR SDRAM.

Figure 29. Mobile DDR SDRAM Write Cycle Timing Diagram

Table 45. SDRAM Self-Refresh Cycle Timing Parameters

Parameter

Symbol

Min.

Max.

Unit

SD16

CKE output delay time

tCKS

1.8

—

Table 46. Mobile DDR SDRAM Write Cycle Timing Parameters1

1 Test condition: Measured using delay line 5 programmed as follows: ESDCDLY5[15:0] = 0x0703.

Parameter

Symbol

Min.

Max.

Unit

SD17

DQ and DQM setup time to DQS

tDS

0.95

—

SD18

DQ and DQM hold time to DQS

tDH

0.95

—

SD19

Write cycle DQS falling edge to SDCLK output delay time

tDSS

1.8

—

SD20

Write cycle DQS falling edge to SDCLK output hold time

tDSH

1.8

—

SDCLK

DQS (output)

DQ (output)

DQM (output)

Data

SD17

SD18

SD19

SD20

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