LM3S9B81_15 Datasheet, PDF (1194/1271 Pages) Texas Instruments – Stellaris LM3S9B81 Microcontroller

Electrical Characteristics
Figure 24-13. SDRAM Write Timing
CLK
(EPI0S31)
CKE
(EPI0S30)
CSn
(EPI0S29)
WEn
(EPI0S28)
RASn
(EPI0S19)
CASn
(EPI0S18)
DQMH, DQML
(EPI0S [17:16])
AD [15:0]
(EPI0S [15:0])
E4
E5
Row
Activate
NOP
NOP
AD [15:0] driven out
Column-1
Write
Data 0
Data 1
...
AD [15:0] driven out
E6
Data n
Burst
Term
Table 24-20. EPI Host-Bus 8 and Host-Bus 16 Interface Characteristics
Parameter No
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
Parameter
Parameter Name
Min
T_ISU
Read data set up time
10
T_IH
Read data hold time
0
T_DV
WEn to write data valid
-
T_DI
Data hold from WEn invalid
2
T_OV
CSn to output valid
-5
T_OINV
CSn to output invalid
-5
T_STLOW
WEn / RDn strobe width low
2
T_FIFO
FEMPTY and FFULL setup time to
2
clock edge
T_ALEHIGH
ALE width high
-
T_CSLOW
CSn width low
4
T_ALEST
ALE rising to WEn / RDn strobe falling 2
T_ALEADD
ALE falling to ADn tristate
1
Nom Max
-
-
-
-
-
5
-
-
-
5
-
5
-
-
-
-
1
-
-
-
-
-
-
-
Unit
ns
ns
ns
EPI Clocks
ns
ns
EPI Clocks
System Clocks
EPI Clocks
EPI Clocks
EPI Clocks
EPI Clocks
1194
Texas Instruments-Production Data
July 03, 2014