LM3S315 Luminary Micro, Inc., LM3S315 Datasheet - Page 292
LM3S315
Manufacturer Part Number
LM3S315
Description
Microcontroller
Manufacturer
Luminary Micro, Inc.
Datasheet
1.LM3S315.pdf
(382 pages)
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Synchronous Serial Interface (SSI)
292
Reset
Reset
Type
Type
Bit/Field
SSI Clock Prescale (SSICPSR)
Offset 0x010
31:8
7:0
RO
RO
31
15
0
0
Register 5: SSI Clock Prescale (SSICPSR), offset 0x010
SSICPSR is the clock prescale register and specifies the division factor by which the system clock
must be internally divided before further use.
The value programmed into this register must be an even number between 2 and 254. The
least-significant bit of the programmed number is hard-coded to zero. If an odd number is written
to this register, data read back from this register has the least-significant bit as zero.
RO
RO
30
14
0
0
CPSDVSR
reserved
Name
RO
RO
29
13
0
0
RO
RO
28
12
0
0
reserved
Type
RO
RO
R/W
27
11
RO
0
0
RO
RO
26
10
0
0
Reset
RO
RO
25
0
0
0
9
0
Preliminary
RO
RO
24
0
8
0
Description
Reserved bits return an indeterminate value, and should
never be changed.
SSI Clock Prescale Divisor
This value must be an even number from 2 to 254, depending
on the frequency of SSICLK. The LSB always returns 0 on
reads.
reserved
R/W
RO
23
0
7
0
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
R/W
RO
20
0
4
CPSDVSR
0
R/W
RO
19
0
3
0
R/W
RO
18
0
2
0
April 27, 2007
R/W
RO
17
0
1
0
R/W
RO
16
0
0
0
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