MCIMX31L FREESCALE [Freescale Semiconductor, Inc], MCIMX31L Datasheet - Page 99

• Manufacturer Part Number: MCIMX31L
• Description: Multimedia Applications Processors
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Freescale Semiconductor
SD16
SD17
SD18
SD19
SD20
ID
ID
DQM (output)
DQS (output)
DQ (output)
SDCLK
SDCLK
SDRAM CLK and DQS related parameters are being measured from the
50% point—that is, high is defined as 50% of signal value and low is defined
as 50% of signal value.
CKE output delay time
DQ & DQM setup time to DQS
DQ & DQM hold time to DQS
Write cycle DQS falling edge to SDCLK output
delay time.
Write cycle DQS falling edge to SDCLK output hold
time.
Table 38. Mobile DDR SDRAM Write Cycle Timing Parameters
Figure 40. Mobile DDR SDRAM Write Cycle Timing Diagram
Table 37. SDRAM Self-Refresh Cycle Timing Parameters
Parameter
SD17
SD17
i.MX31/i.MX31L Advance Information, Rev. 1.4
Parameter
Data
DM
SD18
SD18
Data
DM
Preliminary
NOTE
Data
SD17
DM
SD17
Symbol
tCKS
Data
DM
Symbol
tDSH
tDSS
tDH
tDS
SD18
SD18
Data
DM
Min
1.8
Data
DM
Min
1.2
1.2
1.8
1.8
SD19
Electrical Characteristics
Data
DM
Max
SD20
–
Max
–
–
–
–
Data
DM
Unit
Unit
ns
ns
ns
ns
ns
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