LM3S6753 Datasheet, PDF (581/625 Pages) Texas Instruments – Stellaris LM3S6753 Microcontroller

Stellaris® LM3S6753 Microcontroller
Table 23-10. Clock Characteristics (continued)
Parameter Parameter Name
Min
Nom
Max
f_{XOSC_EXT}
External clock reference for hibernation
module
-
32.768
-
f_MOSC
Main oscillator frequency
1
-
t_{MOSC_per}
Main oscillator period
125
-
f_{ref_crystal_bypass}
Crystal reference using the main oscillator
(PLL in BYPASS mode)^a
1
-
8.192
1000
8.192
f_{ref_ext_bypass}
External clock reference (PLL in BYPASS
mode)^a
0
-
50
f_{system_clock}
System clock
0
-
50
a. The ADC must be clocked from the PLL or directly from a 16-MHz clock source to operate properly.
Unit
KHz
MHz
ns
MHz
MHz
MHz
Table 23-11. Crystal Characteristics
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)
8
±50
±5
Parallel
±25
±25
27.8
14.3
120
10
16
100
Value
6
4
±50
±50
±5
±5
Parallel
Parallel
±25
±25
±25
±25
37.0
55.6
19.1
28.6
160
200
10
10
16
16
100
100
3.5
±50
±5
Parallel
±25
±25
63.5
32.7
220
10
16
100
Units
MHz
ppm
ppm/yr
-
ppm
ppm
pF
mH
Ω
pF
pF
µW
23.2.2.1 System Clock Specifications with ADC Operation
Table 23-12. System Clock Characteristics with ADC Operation
Parameter Parameter Name
Min
f_sysadc
System clock frequency when the ADC module is
16
operating (when PLL is bypassed)
Nom
Max
-
-
Unit
MHz
23.2.3 JTAG and Boundary Scan
Table 23-13. JTAG Characteristics
Parameter
No.
J1
J2
J3
J4
J5
J6
Parameter Parameter Name
f_TCK
t_TCK
t_{TCK_LOW}
t_{TCK_HIGH}
t_{TCK_R}
t_{TCK_F}
TCK operational clock frequency
TCK operational clock period
TCK clock Low time
TCK clock High time
TCK rise time
TCK fall time
Min
Nom
0
-
100
-
-
t_TCK
-
t_TCK
0
-
0
-
Max
10
-
-
-
10
10
Unit
MHz
ns
ns
ns
ns
ns
April 05, 2010
581
Texas Instruments-Production Data