mcimx27- Freescale Semiconductor, Inc, mcimx27- Datasheet - Page 75

• Manufacturer Part Number: mcimx27-
• Description: Multimedia Applications Processor
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
SD11
SD12
SD1
SD2
SD3
SD4
SD5
SD6
SD7
ID
SDCLK
SDCLK
ADDR
DQM
RAS
CAS
WE
DQ
CS
SDRAM clock high-level width
SDRAM clock low-level width
SDRAM clock cycle time
CS, RAS, CAS, WE, DQM, CKE setup time
CS, RAS, CAS, WE, DQM, CKE hold time
Address setup time
Address hold time
Precharge cycle period
Active to read/write command delay
SD4
SD6
BA
Figure 38. SDR SDRAM Write Cycle Timing Diagram
Table 38. SDR SDRAM Write Timing Parameters
SD5
Preliminary—Subject to Change Without Notice
SD7
1
Parameter
i.MX27 and i.MX27L Data Sheet, Rev. 1.2
SD11
1
ROW / BA
SD12
SD1
SD3
SD4
SD13
Symbol
tCMS
tCMH
tRCD
tCH
tCL
tCK
tAS
tAH
tRP
SD4
SD4
COL/BA
SD2
DATA
SD5
SD5
SD5
SD14
Min
3.4
3.4
7.5
2.0
1.8
2.0
1.8
1
1
Max
Signal Descriptions
4.1
4.1
—
—
—
—
—
4
8
clock
clock
Unit
ns
ns
ns
ns
ns
ns
ns
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