Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X 데이터 시트
제품 코드
DK-TM4C129X
Table 32-18. Actual PLL Frequency (continued)
PLL Frequency
(MHz)
Reference
Frequency
(MHz)
b
N
MINT (Hexadecimal
Value)
MINT (Decimal
Value)
Crystal
Frequency
(MHz)
320
5
0x4
0x40
64
25
480
5
0x0
0x60
96
5
480
6
0x0
0x50
80
6
480
8
0x0
0x3C
60
8
480
10
0x0
0x30
48
10
480
12
0x0
0x28
40
12
480
16
0x0
0x1E
30
16
480
6
0x2
0x50
80
18
480
20
0x0
0x18
24
20
480
24
0x0
0x14
20
24
480
5
0x4
0x60
96
25
a. For all examples listed, Q=0
b. For a given crystal frequency, N should be chosen such that the reference frequency is within 4 to 30 MHz.
32.9.2
PIOSC Specifications
Table 32-19. PIOSC Clock Characteristics
Unit
Max
Nom
Min
Parameter Name
Parameter
-
±3%
b
-
-
Internal 16-MHz precision oscillator frequency variance
(factory calibrated at 25 °C and 3.3 V) across the
specified voltage and temperature range
(factory calibrated at 25 °C and 3.3 V) across the
specified voltage and temperature range
a
F
PIOSC
µs
1
-
-
PIOSC startup time
c
T
START
a. This parameter value remains valid if recalibration occurs.
b. ±3% can only be met with VDD±5%.
c. PIOSC startup time is part of reset and is included in the internal reset timeout value (T
IRTOUT
) given in Table
32-14 on page 2112. Note that the T
START
value is based on simulation.
32.9.3
Low-Frequency Internal Oscillator Specifications
Table 32-20. Low-Frequency Oscillator Characteristics
Unit
Max
Nom
Min
Parameter Name
Parameter
KHz
90
a
33
10
a
Internal low-frequency oscillator
frequency
frequency
F
LFIOSC
a. Preliminary, pending characterization.
32.9.4
Hibernation Clock Source Specifications
Table 32-21. Hibernation Internal Low Frequency Oscillator Clock Characteristics
Unit
Max
Nom
Min
Parameter Name
Parameter
KHz
90
33
10
Internal Low Frequency Hibernation
oscillator frequency
oscillator frequency
F
HIBLFIOSC
2117
December 13, 2013
Texas Instruments-Advance Information
Tiva
™
TM4C129XNCZAD Microcontroller