LM3S1B21 Datasheet, PDF (503/947 Pages) Texas Instruments – Stellaris® LM3S1B21 Microcontroller

Stellaris^® LM3S1B21 Microcontroller
Register 8: EPI Host-Bus 16 Configuration 2 (EPIHB16CFG2), offset 0x014
Important: The MODE field in the EPICFG register determines which configuration register is
accessed for offsets 0x010 and 0x014.
To access EPIHB16CFG2, the MODE field must be 0x3.
This register is used to configure operation while in Host-Bus 16 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 16 mode is selected again, the values must be reinitialized.
EPI Host-Bus 16 Configuration 2 (EPIHB16CFG2)
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 [15:0] for Host-Bus 16
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 [31:16]. When WORD is set, 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
All CSn 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.
January 21, 2012
503
Texas Instruments-Production Data