DRA790 Datasheet, PDF (157/436 Pages) Texas Instruments – Infotainment Applications Processor

www.ti.com
(11) P = 1/(SYS_CLK1/610) frequency in ns.
porz
vddshv8
vdda33v_usb1, vdda33v_usb2
vddshv1, vddshv3, vddshv4,
vddshv7, vddshv9,
vddshv10, vddshv11
vdda_usb1, vdda_usb2, vdda_hdmi,
vdda_pcie, vdda_usb3
vdd_dsp
DRA790, DRA791
DRA793, DRA797
SPRS968A – AUGUST 2016 – REVISED FEBRUARY 2017
Note 4
Note 6
Note 5
vdd
vdds_ddr1, ddr1_vref0
vdda_per, vdda_ddr, vdda_debug,
vdda_core_gmac, vdda_gpu,
vdda_video, vdda_osc, vdda_csi,
vdda_mpu_abe
vdds18v, vdds_mlbp, vdds18v_ddr1
xi_osc0
Figure 5-5. Power-Down Sequencing
SPRS960_ELCH_05
(1) Grey shaded areas are windows where it is valid to ramp the voltage rail.
(2) Blue dashed lines are not valid windows but show alternate ramp possibilities based on the associated note.
(3) xi_osc0 can be turned off anytime after porz assertion and must be turned off before vdda_osc voltage rail is shutdown.
(4) vdd must ramp after or at the same time as vdd_dsp.
(5) If any of the vddshv1, vddshv3, vddshv4, vddshv7, vddshv[9-11] rails (not including vddshv8) are used as 1.8V only, then these rails can
be combined with vdds18v.
– vddshv1, vddshv3, vddshv4, vddshv7, vddshv[9-11] is allowed to ramp down at either of the two points shown in the timing diagram
in either 1.8V mode or in 3.3V mode.
– If vddshv1, vddshv3, vddshv4, vddshv7, vddshv[9-11] ramps down at the later time in the diagram then the board design must
guarantee that the vddshv[1-7,9-11] rail is never higher than 2.0 V above the vdds18v rail.
(6) vddshv8 is separated out to show support for dual voltage. If a dedicated LDO/supply source is used for vddshv8, then vddshv8 ramp
down should occur at one of the two earliest points in the timing diagram. If vddshv8 is powered by the same supply source as the other
vddshvn rails, then it is allowed to ramp down at either of the last two points in the timing diagram.
(7) Ramped Down is defined as reaching a voltage level of no more than 0.6V.
Figure 5-6 describes vddshv[1-7,9-11] Supplies Falling Before vdds18v Supplies Delta.
Copyright © 2016–2017, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: DRA790 DRA791 DRA793 DRA797
Specifications 157