Datasheet

Table 23-11. Clock Characteristics (continued)
UnitMaxNomMinParameter NameParameter
KHz-32.768-External clock reference for hibernation
module
f
XOSC_EXT
MHz8.192-1Main oscillator frequencyf
MOSC
ns1000-125Main oscillator periodt
MOSC_per
MHz8.192-1Crystal reference using the main oscillator
(PLL in BYPASS mode)
a
f
ref_crystal_bypass
MHz50-0External clock reference (PLL in BYPASS
mode)
a
f
ref_ext_bypass
MHz50-0System clockf
system_clock
a. The ADC must be clocked from the PLL or directly from a 16-MHz clock source to operate properly.
Table 23-12. Crystal Characteristics
UnitsValueParameter Name
MHz3.5468Frequency
ppm±50±50±50±50Frequency tolerance
ppm/yr±5±5±5±5Aging
-ParallelParallelParallelParallelOscillation mode
ppm±25±25±25±25Temperature stability (-40°C to 85°C)
ppm±25±25±25±25Temperature stability (-40°C to 105°C)
pF63.555.637.027.8Motional capacitance (typ)
mH32.728.619.114.3Motional inductance (typ)
Ω220200160120Equivalent series resistance (max)
pF10101010Shunt capacitance (max)
pF16161616Load capacitance (typ)
µW100100100100Drive level (typ)
23.2.2.1 System Clock Specifications with ADC Operation
Table 23-13. System Clock Characteristics with ADC Operation
UnitMaxNomMinParameter NameParameter
MHz--16System clock frequency when the ADC module is
operating (when PLL is bypassed)
f
sysadc
23.2.3 JTAG and Boundary Scan
Table 23-14. JTAG Characteristics
UnitMaxNomMinParameter NameParameterParameter
No.
MHz10-0TCK operational clock frequencyf
TCK
J1
ns--100TCK operational clock periodt
TCK
J2
ns-t
TCK
/2-TCK clock Low timet
TCK_LOW
J3
ns-t
TCK
/2-TCK clock High timet
TCK_HIGH
J4
ns10-0TCK rise timet
TCK_R
J5
ns10-0TCK fall timet
TCK_F
J6
753June 18, 2012
Texas Instruments-Production Data
Stellaris
®
LM3S8962 Microcontroller
NRND: Not recommended for new designs.