LM3S9B81 Datasheet, PDF (1093/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

Stellaris® LM3S9B81 Microcontroller
Table 25-22. EPI Host-Bus 8 and Host-Bus 16 Interface Characteristics (continued)
Parameter No Parameter
Parameter Name
Min
E23
t_CSLOW
CSn width low
4
E24
t_ALEST
ALE rising to WEn / RDn strobe falling 2
Nom Max
-
-
-
-
Unit
EPI Clocks
EPI Clocks
Figure 25-13. Host-Bus 8/16 Mode Read Timing
ALE
(EPI0S30)
CSn
(EPI0S30)
WRn
(EPI0S29)
RDn/OEn
(EPI0S28)
BSEL0n/
BSEL1n^a
Address
E22
E18
E18
E24
Data
a _{BSEL0n and BSEL1n are available in Host-Bus 16 mode only.}
E23
E20
E19
E14
E15
Data
Figure 25-14. Host-Bus 8/16 Mode Write Timing
E22
ALE
(EPI0S30)
E18
CSn
E23
(EPI0S30)
WRn
E18
E19
E20
(EPI0S29)
E24
RDn/Oen
(EPI0S28)
BSEL0n
BSEL1n^a
Address
E16
Data
a _{BSEL0n and BSEL1n are available in Host-Bus 16 mode only.}
Data
Table 25-23. EPI General-Purpose Interface Characteristics
Parameter No
E25
E26
E27
E28
Parameter
Parameter Name
t_CK
General-Purpose Clock period
t_CH
General-Purpose Clock high time
t_CL
General-Purpose Clock low time
t_ISU
Input signal set up time to rising clock edge
Min
Nom Max
Unit
20
-
-
ns
10
-
-
ns
10
-
-
ns
10
-
-
ns
June 29, 2010
Texas Instruments-Advance Information
1093