AM1806_11 Datasheet, PDF (217/244 Pages) Texas Instruments – AM1806 ARM Microprocessor

AM1806
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SPRS658C – FEBRUARY 2010 – REVISED APRIL 2011
5.26.1 Timer Electrical Data/Timing
Table 5-109. Timing Requirements for Timer Input^{(1) (2)} (see Figure 5-72)
NO.
PARAMETER
1.3V, 1.2V, 1.1V, 1.0V
MIN
MAX
UNIT
1 t_{c(TM64Px_IN12)} Cycle time, TM64Px_IN12
2 t_w(TINPH)
Pulse duration, TM64Px_IN12 high
3 t_w(TINPL)
Pulse duration, TM64Px_IN12 low
4 t_{t(TM64Px_IN12)} Transition time, TM64Px_IN12
4P
0.45C
0.45C
ns
0.55C
ns
0.55C
ns
0.05C or 10⁽³⁾ ns
(1) P = OSCIN cycle time in ns.
(2) C = TM64P0_IN12 cycle time in ns. For example, when TM64Px_IN12 frequency is 27 MHz, use C = 37.037 ns
(3) Whichever is smaller. P = the period of the applied signal. Maintaining transition times as fast as possible is recommended to improve
noise immunity on input signals.
1
2
3
4
4
TM64P0_IN12
Figure 5-72. Timer Timing
Table 5-110. Switching Characteristics Over Recommended Operating Conditions for Timer Output ⁽¹⁾
NO.
PARAMETER
5 t_w(TOUTH)
Pulse duration, TM64P0_OUT12 high
6 t_w(TOUTL)
Pulse duration, TM64P0_OUT12 low
(1) P = OSCIN cycle time in ns.
1.3V, 1.2V, 1.1V, 1.0V
MIN
MAX
4P
4P
UNIT
ns
ns
TM64P0_OUT12
5
6
Figure 5-73. Timer Timing
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Peripheral Information and Electrical Specifications 217
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