LM3S8930 Luminary Micro, Inc, LM3S8930 Datasheet - Page 490

• Manufacturer Part Number: LM3S8930
• Description: Lm3s8930 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Electrical Characteristics
20.2.3
490
Table 20-8. Clock Characteristics
Table 20-9. Crystal Characteristics
I
Table 20-10. I
a. Values depend on the value programmed into the TPR bit in the I
f
f
f
f
f
f
t
f
f
f
Parameter Name
Frequency
Frequency tolerance
Aging
Oscillation mode
Temperature stability (-40°C to 85°C)
Temperature stability (-40°C to 105°C)
Motional capacitance (typ)
Motional inductance (typ)
Equivalent series resistance (max)
Shunt capacitance (max)
Load capacitance (typ)
Drive level (typ)
Parameter No.
2
IOSC
IOSC30KHZ
XOSC
XOSC_XTAL
XOSC_EXT
MOSC
MOSC_per
ref_crystal_bypass
ref_ext_bypass
system_clock
C
Parameter
programmed for the maximum I2CSCL frequency (TPR=0x2) results in a minimum output timing as shown in the table
I1
I2
I3
I4
I5
I6
I7
I8
I9
a
a
b
a
c
a
a
a
a
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
Parameter
2
C Characteristics
t
t
t
SCSR
t
t
SCH
t
t
t
t
SRT
SFT
SCS
DH
HT
DS
LP
Parameter Name
Start condition hold time
Clock Low period
I2CSCL/I2CSDA rise time (V
Data hold time
I2CSCL/I2CSDA fall time (V
Clock High time
Data setup time
Start condition setup time (for repeated start condition
only)
Stop condition setup time
Parallel
27.8
14.3
±50
±25
±25
120
100
10
16
±5
8
Preliminary
Parallel
37.0
19.1
±50
±25
±25
160
100
±5
10
16
6
Value
IH
Parallel
IL
55.6
28.6
±50
±25
±25
200
100
=2.4 V to V
±5
10
16
=0.5 V to V
4
Parallel
2
C Master Timer Period (I2CMTPR) register; a TPR
63.5
32.7
±50
±25
±25
220
100
3.5
±5
10
16
IL
IH
=0.5 V)
=2.4 V)
Units
ppm/yr
MHz
ppm
ppm
ppm
mH
µW
pF
pF
pF
Ω
-
Min
36
36
24
18
36
24
2
-
-
Min
125
8.4
21
1
1
0
0
-
-
-
Nom
9
4.194304
4.194304
-
-
-
-
-
-
-
-
32.768
Nom
12
30
(see note b)
-
-
-
-
-
Max
10
-
-
-
-
-
-
-
1000
Max
15.6
39
50
50
8
8
-
-
-
July 25, 2008
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Unit
KHz
KHz
system clocks
system clocks
system clocks
system clocks
system clocks
system clocks
system clocks
ns
Unit
ns
ns