LM3S5791_16 Datasheet, PDF (502/1336 Pages) Texas Instruments – Stellaris LM3S5791 Microcontroller

External Peripheral Interface (EPI)
Register 7: EPI Host-Bus 8 Configuration 2 (EPIHB8CFG2), offset 0x014
Important: The MODE field in the EPICFG register determines which configuration register is
accessed for offsets 0x010 and 0x014.
To access EPIHB8CFG2, the MODE field must be 0x2.
This register is used to configure operation while in Host-Bus 8 mode. Note that this register is reset
when the MODE field in the EPICFG register is changed. If another mode is selected and the Host-Bus
8 mode is selected again, the values must be reinitialized.
EPI Host-Bus 8 Configuration 2 (EPIHB8CFG2)
Base 0x400D.0000
Offset 0x014
Type R/W, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
WORD
reserved
CSBAUD
CSCFG
reserved
Type R/W
RO
RO
RO
RO
R/W
R/W
R/W
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31
Name
WORD
Type
R/W
Reset
0
Description
Word Access Mode
By default, the EPI controller uses data bits [7:0] for Host-Bus 8
accesses. When using Word Access mode, the EPI controller can
automatically route bytes of data onto the correct byte lanes such that
data can be stored in bits [31:8]. When WORD is set, short and long
variables can be used in C programs.
Value Description
0 Word Access mode is disabled.
1 Word Access mode is enabled.
30:27
26
reserved
CSBAUD
RO
0x0
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
R/W
0
Chip Select Baud Rate
Value Description
0 Same Baud Rate
Both CS0n and CS1n use the baud rate for the external bus
that is defined by the COUNT0 field in the EPIBAUD register.
1 Different Baud Rates
CS0n uses the baud rate for the external bus that is defined by
the COUNT0 field in the EPIBAUD register. CS1n uses the baud
rate defined by the COUNT1 field in the EPIBAUD register.
502
July 03, 2014
Texas Instruments-Production Data