MCIMX31C_09 Datasheet, PDF (43/108 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processors for Industrial and Automotive Products

SDCLK
SDCLK
CS
RAS
CAS
SD11
SD4
WE
ADDR
SD6
BA
SD5
SD7
ROW / BA
DQ
Electrical Characteristics
SD1
SD2
SD3
SD4
SD5
SD4
SD5
SD4
SD5
SD12
COL/BA
SD13
DATA
SD14
DQM
Figure 34. SDR SDRAM Write Cycle Timing Diagram
Table 32. SDR SDRAM Write Timing Parameters
ID
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD11
SD12
Parameter
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 period¹
Active to read/write command delay¹
Symbol
Min
tCH
3.4
tCL
3.4
tCK
7.5
tCMS
2.0
tCMH
1.8
tAS
2.0
tAH
1.8
tRP
1
tRCD
1
Max
Unit
4.1
ns
4.1
ns
—
ns
—
ns
—
ns
—
ns
—
ns
4
clock
8
clock
MCIMX31C/MCIMX31LC Technical Data, Rev. 4.2
Freescale Semiconductor
43