AM1808 Datasheet, PDF (240/264 Pages) Texas Instruments – AM1808 ARM Microprocessor

AM1808
SPRS653 – FEBRUARY 2010
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6.30.1 Timer Electrical Data/Timing
Table 6-131. Timing Requirements for Timer Input^{(1) (2)} (see Figure 6-80)
1.3V, 1.2V, 1.1V,
NO.
PARAMETER
1.0V
MIN MAX
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
0.55C
0.55C
0.05C
(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
UNIT
ns
ns
ns
ns
1
2
3
4
4
TM64P0_IN12
Figure 6-80. Timer Timing
Table 6-132. 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. For example, when OSCIN frequency is 27 MHz, use P = 37.037 ns.
1.3V, 1.2V, 1.1V,
1.0V
MIN MAX
4P
4P
UNIT
ns
ns
TM64P0_OUT12
5
6
Figure 6-81. Timer Timing
240 Peripheral Information and Electrical Specifications
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