LM3S101-CRN20-XNPT Luminary Micro, Inc., LM3S101-CRN20-XNPT Datasheet - Page 274

• Manufacturer Part Number: LM3S101-CRN20-XNPT
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

17.2.2
17.2.3
March 22, 2006
Clocks
Table 17-7. 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
b. PLL frequency is automatically calculated by the hardware based on the XTAL field of the RCC register.
Table 17-8. Clock Characteristics
Analog Comparator
TBD
f
f
f
s
f
f
T
f
f
t
f
ref_crystal
ref_ext
ref_crystal_bypas
ref_ext_bypass
pll
BOSC
MOSC
MOSC_per
system_clock
READY
Parameter
Parameter
Configuration (RCC) register (see page 70).
Parameter Name
Crystal reference
External reference
PLL bypass
PLL bypass
PLL frequency
PLL lock time
Parameter Name
Boot oscillator frequency
Main oscillator frequency
Main oscillator period
System clock
b
b
a
a
Preliminary
3.579545
3.579545
1000
10.5
Min
Min
1
0
1
0
Nom
Nom
200
15
-
-
-
-
-
-
-
8.192
8.192
Max
Max
19.5
125
LM3S101 Data Sheet
0.5
20
20
8
8
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Unit
Unit
ms
ms
274