AM1705DPTPA3 Datasheet, PDF (125/164 Pages) Texas Instruments – AM1705 ARM Microprocessor

AM1705
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5.22.1 Timer Electrical Data/Timing
SPRS657D – FEBRUARY 2010 – REVISED MARCH 2013
Table 5-77. Timing Requirements for Timer Input^{(1) (2)} (see Figure 5-42)
No.
PARAMETER
MIN
MAX
UNIT
1
t_{c(TM64Px_IN12)}
2
t_w(TINPH)
3
t_w(TINPL)
4
t_{t(TM64Px_IN12)}
Cycle time, TM64Px_IN12
Pulse duration, TM64Px_IN12 high
Pulse duration, TM64Px_IN12 low
Transition time, TM64Px_IN12
4P
ns
0.45C
0.55C
ns
0.45C
0.55C
ns
0.25P or 10⁽³⁾
ns
(1) P = OSCIN cycle time in ns. For example, when OSCIN frequency is 27 MHz, use P = 37.037 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.
4
TM64P0_IN12
1
2
3
4
Figure 5-42. Timer Timing
Table 5-78. Switching Characteristics Over Recommended Operating Conditions for Timer Output ⁽¹⁾
No.
PARAMETER
5
t_w(TOUTH)
6
t_w(TOUTL)
Pulse duration, TM64P0_OUT12 high
Pulse duration, TM64P0_OUT12 low
(1) P = OSCIN cycle time in ns. For example, when OSCIN frequency is 27 MHz, use P = 37.037 ns.
MIN
4P
4P
MAX
UNIT
ns
ns
TM64P0_OUT12
5
6
Figure 5-43. Timer Timing
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Peripheral Information and Electrical Specifications 125
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