LM3S1150-IQC50 Luminary Micro, Inc., LM3S1150-IQC50 Datasheet - Page 440

• Manufacturer Part Number: LM3S1150-IQC50
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

Electrical Characteristics
21.2
21.2.1
21.2.2
440
AC Characteristics
Load Conditions
Unless otherwise specified, the following conditions are true for all timing measurements. Timing
measurements are for 4-mA drive strength.
Figure 21-1. Load Conditions
Clocks
Table 21-5. Phase Locked Loop (PLL) Characteristics
a. The exact value is determined by the crystal value programmed into the XTAL field of the Run-Mode Clock Configuration
b. PLL frequency is automatically calculated by the hardware based on the XTAL field of the RCC register.
Table 21-6. Clock Characteristics
Table 21-7. Crystal Characteristics
Parameter
f
f
f
T
f
f
f
f
f
f
t
f
f
f
Parameter Name
Frequency
Frequency tolerance
Aging
ref_crystal
ref_ext
pll
IOSC
IOSC30KHZ
XOSC
XOSC_XTAL
XOSC_EXT
MOSC
MOSC_per
ref_crystal_bypass
ref_ext_bypass
system_clock
READY
Parameter
pin
(RCC) register.
Parameter Name
Crystal reference
External clock reference
PLL frequency
PLL lock time
Parameter Name
Internal 12 MHz oscillator frequency
Internal 30 KHz oscillator frequency
Hibernation module oscillator frequency
Crystal reference for hibernation oscillator
External clock reference for hibernation module
Main oscillator frequency
Main oscillator period
Crystal reference using the main oscillator (PLL in BYPASS mode)
External clock reference (PLL in BYPASS mode)
System clock
GND
Luminary Micro Confidential-Advance Product Information
C
L
b
= 50 pF
a
a
±50
±5
3.579545
3.579545
8
Min
-
-
±50
±5
6
Nom
Value
400
-
-
-
±50
8.192
8.192
±5
Max
4
0.5
-
MHz
MHz
MHz
Unit
ms
±50
3.5
±5
Units
ppm/yr
MHz
ppm
Min
125
8.4
21
1
1
0
0
-
-
-
4.194304
4.194304
32.768
Nom
12
30
-
-
-
-
-
1000
Max
15.6
39
50
50
8
8
-
-
-
June 14, 2007
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Unit
KHz
KHz
ns