DM3730_14 Datasheet, PDF (129/281 Pages) Texas Instruments – Digital Media Processors

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DM3730, DM3725
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.
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Electrical Characteristics 129