OMAP3503DCBBA Datasheet, PDF (131/264 Pages) Texas Instruments – OMAP3515 and OMAP3503 Applications Processors

OMAP3515, OMAP3503
www.ti.com
SPRS505H – FEBRUARY 2008 – REVISED OCTOBER 2013
3.6.2 Power-down Sequence
The following steps give an example of the power-down sequence supported by the OMAP3515/03
device.
1. Reset OMAP3515/03 device.
2. Stop all signals driven to OMAP3515/03 balls.
3. Option 1: Power down all domains simutaneously.
4. Option 2: If all domains cannot be powered down simultaneously, follow the below sequence:
(a) Power off all complex I/O domains (vdds_mmc1, vdds_mmc1a, vdda_dac)
(b) Power off all core domains (vdd_core, vdd_mpu )
(c) Power off all PLL domains (vdds_dpll_dll, vdds_dpll_per)
(d) Power off all SRAM LDOs (vdds_sram)
(e) Power off all reference domains (vdds_wkup_bg)
(f) Power off all standard I/O domains (vdds, vdds_mem)
The OMAP3515/03 device proceeds with the power-down sequence shown in Figure 3-4 .
Note: Another possible power-down sequence:
• vdd_mpu shuts down before vdd_core.
• vdds_sram, vdds_wkup_bg, vdds, and vdds_mem shut down simultaneously.
• vdds_dpll_dll and vdds_dpll_per shut down anytime between all complex IO domains shut down and
vdds_sram shuts down.
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ELECTRICAL CHARACTERISTICS 131
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