DLPC3470 datasheet(22/70 Pages) TI1

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tw(L)

RESETZ

80%

50%

20%

DC Power

Supplies

80%

50%

20%

80%

50%

20%

80%

50%

20%

tw(L)

MOSC

50%

80%

20%

50%

tw(H)

tw(L)

80%

20%

DLPC3470

DLPS110 – APRIL 2018

www.ti.com

Product Folder Links: DLPC3470

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(1)

The I/O pin TSTPT_6 enables the ASIC to use two different oscillator frequencies through a pullup control at initial ASIC power-up.

TSTPT_6 should be grounded so that 24MHz is always selected.

(2)

The frequency accuracy for MOSC is ±200 PPM. (This includes impact to accuracy due to aging, temperature, and trim sensitivity.) The

MOSC input cannot support spread spectrum clock spreading.

(3)

Applies only when driven through an external digital oscillator.

6.10 System Oscillators Timing Requirements

see

(1)

PARAMETER

MIN

MAX

UNIT

fclock

Clock frequency, MOSC(2)

24-MHz oscillator

23.998

24.002

MHz

Cycle time, MOSC(2)

24-MHz oscillator

41.670

41.663

tw(H)

Pulse duration(3), MOSC, high

50% to 50% reference points (signal)

40 tc%

tw(L)

Pulse duration(3), MOSC, low

50% to 50% reference points (signal)

40 tc%

Transition time(3), MOSC, tt = tf / tr

20% to 80% reference points (signal)

tjp

Long-term, peak-to-peak, period jitter(3), MOSC

(that is the deviation in period from ideal period

due solely to high frequency jitter)

(1)

For more information on RESETZ, see Pin Configuration and Functions.

Figure 2. System Oscillators

6.11 Power-Up and Reset Timing Requirements

PARAMETER

MIN

MAX

UNIT

tw(L)

Pulse duration, inactive low, RESETZ

50% to 50% reference points (signal)

1.25

µs

Transition time, RESETZ(1), tt = tf / tr

20% to 80% reference points (signal)

0.5

µs

Figure 3. Power-Up and Power-Down RESETZ Timing

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