TM4C1290NCPDT Datasheet, PDF (1580/1628 Pages) Texas Instruments – Tiva Microcontroller

Electrical Characteristics
26.9.2
26.9.3
26.9.4
Table 26-18. Actual PLL Frequency (continued)
Crystal
MINT (Decimal MINT (Hexadecimal
N
Frequency
Value)
Value)
(MHz)
Reference
Frequency
(MHz)^b
PLL Frequency
(MHz)
16
30
0x1E
0x0
16
480
18
80
0x50
0x2
6
480
20
24
0x18
0x0
20
480
24
20
0x14
0x0
24
480
25
96
0x60
0x4
5
480
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.
PIOSC Specifications
Table 26-19. PIOSC Clock Characteristics
Parameter Parameter Name
Min Nom
Max
Unit
Factory calibration, 0 to +105°C:
-
-
±4.5%
-
Internal 16-MHz precision oscillator frequency variance across
voltage and temperature range when factory calibration is used
F_PIOSC
Factory calibration, -40°C to <0°C
Recalibration:
-
-
±10%
-
-
-
±1%
-
Internal 16-MHz precision oscillator frequency variance when
recalibration is used at a specific temperature
T_START PIOSC startup time^a
-
-
1
µs
a. PIOSC startup time is part of reset and is included in the internal reset timeout value (T_IRTOUT) given in Table
26-14 on page 1574. Note that the T_START value is based on simulation.
Low-Frequency Internal Oscillator Specifications
Table 26-20. Low-Frequency Oscillator Characteristics
Parameter
F_LFIOSC
Parameter Name
Min
Internal low-frequency oscillator frequency
10
Nom
33
Max
75
Unit
KHz
Hibernation Clock Source Specifications
Table 26-21. Hibernation Internal Low Frequency Oscillator Clock Characteristics
Parameter
F_HIBLFIOSC
Parameter Name
Internal Low Frequency Hibernation
oscillator frequency
Min
Nom
Max
Unit
10
33
90
KHz
Table 26-22. Hibernation External Oscillator (XOSC) Input Characteristics
Parameter
F_HIBXOSCa
C₁, C₂
C_PKG
C_PCB
C_SHUNT
Parameter Name
Parallel resonance frequency
External load capacitance on XOSC0, XOSC1 pins^b
Device package stray shunt capacitance^b
PCB stray shunt capacitance^b
Total shunt capacitance^b
Min
Nom
Max
-
32.768
-
12
-
24
-
0.5
-
-
0.5
-
-
-
4
Unit
KHz
pF
pF
pF
pF
1580
Texas Instruments-Production Data
June 18, 2014