DM3725CBC datasheet(129/280 Pages) TI

129 / 280 page

DM3730, DM3725

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SPRS685D

– AUGUST 2010 – REVISED JULY 2011

NOTE

•

Decoupling capacitors must be placed as closed as possible of the power ball. Choose

the ground located closest to the power pin for each decoupling capacitor. In case of

interconnecting powers, first insert the decoupling capacitor and then interconnect the

powers.

•

The decoupling capacitor value depends on the board characteristics.

3.5

Power-Up and Power-Down Sequences

This section provides the timing requirements for the device hardware signals.

NOTE

•

If the MMC dual voltages interfaces are used with 1.8-V or 3.0-V, then the power-up and

power-down sequences specified in the Figure 3-2 and Figure 3-3 must be followed

carefully to avoid any significant current consumption.

•

If the MMC dual voltages interfaces are used with 1.8-V only (3.0-V is never used), then

vdds_mmc1, vdds_x may be connected to the main power supply vdds so that they ramp

up together before vdd_core.

3.5.1

Power-Up Sequence

NOTE

For more information, see the Power, Reset, and Clock Management / PRCM Functional

Description / PRCM Reset Manager Functional Description / Reset Sequences of the

AM/DM37x Multimedia Device Technical Reference Manual (literature number SPRUGN4).

Figure 3-2 shows the power-up sequence.

Electrical Characteristics

129

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