LM3S2965-IQC20-A0T Luminary Micro, Inc., LM3S2965-IQC20-A0T Datasheet - Page 78
LM3S2965-IQC20-A0T
Manufacturer Part Number
LM3S2965-IQC20-A0T
Description
Microcontroller
Manufacturer
Luminary Micro, Inc.
Datasheet
1.LM3S2965-IQC20-A0T.pdf
(542 pages)
- Current page: 78 of 542
- Download datasheet (5Mb)
System Control
78
Bit/Field
19:17
16:14
9:6
13
12
11
10
PWMDIV
reserved
reserved
BYPASS
reserved
PWRDN
Name
XTAL
Type
R/W
R/W
R/W
R/W
RO
RO
RO
Reset
0xB
0x7
0
1
1
1
0
Preliminary
Description
PWM Unit Clock Divisor
This field specifies the binary divisor used to predivide the system clock
down for use as the timing reference for the PWM module. This clock
is only power 2 divide and rising edge is synchronous without phase
shift from the system clock.
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.
PLL Power Down
This bit connects to the PLL PWRDN input. The reset value of 1 powers
down the PLL.
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.
PLL Bypass
Chooses whether the system clock is derived from the PLL output or
the OSC source. If set, the clock that drives the system is the OSC
source. Otherwise, the clock that drives the system is the PLL output
clock divided by the system divider.
Note:
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.
This field specifies the crystal value attached to the main oscillator. The
encoding for this field is provided in Table 6-3 on page 79.
Binary Value
000
001
010
011
100
101
110
111
The ADC must be clocked from the PLL or directly from a
14-MHz to 18-MHz clock source to operate properly. While
the ADC works in a 14-18 MHz range, to maintain a 1 M
sample/second rate, the ADC must be provided a 16-MHz
clock source.
Divisor
/2
/4
/8
/16
/32
/64
/64
/64 (default)
June 04, 2007
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