Table 6-6 and Figure 6-6 describes the device power-down sequencing.
Note: The power supply sequencing
requirements defined in this section does not include entry or exit from low power
modes. See
Section 6.12.2.2.3, Partial IO Power Sequencing for more information on the requirements for
entering or exiting from Partial IO low power mode.
Note: All power rails must be turned off
and decay below 300mV before initiating a new power-up sequence anytime a power rail
drops below the minimum value defined in Recommended Operating Conditions.
The only exception is when entering/exiting Partial IO low power mode with
VDDSHV_CANUART and VDD_CANUART sourced from an always on power source. For this use
case the VDDSHV_CANUART and VDD_CANUART power rails are allowed to remain on.
Table 6-6 Power-Down Sequencing – Supply
/ Signal Assignments See: Figure 6-6
WAVEFORM |
SUPPLY / SIGNAL NAME |
A |
VSYS, VMON_VSYS |
B |
VDDSHV_CANUART(1), VDDSHV_MCU(1), VDDSHV0(1), VDDSHV1(1), VDDSHV2(1), VDDSHV3(1), VDDA_3P3_USB, VMON_3P3_SOC |
C |
VDDSHV_CANUART(2), VDDSHV_MCU(2), VDDSHV0(2), VDDSHV1(2), VDDSHV2(2), VDDSHV3(2), VDDS_MMC0, VDDA_MCU, VDDS_OSC0, VDDA_PLL0, VDDA_PLL1, VDDA_PLL2,
VDDA_PLL3, VDDA_PLL4, VDDA_1P8_CSI_DSI, VDDA_1P8_OLDI0,
VDDA_1P8_USB, VDDA_TEMP0, VDDA_TEMP1, VDDA_TEMP2,
VMON_1P8_SOC |
D |
VDDSHV5(3), VDDSHV6(3) |
E |
VDDS_DDR, VDDS_DDR_C |
F |
VDD_CANUART(4) |
G |
VDD_CANUART(5), VDD_CORE(5), VDDA_CORE_CSI_DSI(5), , VDDA_CORE_DSI_CLK(5), VDDA_CORE_USB0(5), VDDA_DDR_PLL0(5) |
H |
VDD_CANUART(6), VDD_CORE(6), VDDA_CORE_CSI_DSI(6), , VDDA_CORE_DSI_CLK(6), VDDA_CORE_USB0(6), VDDA_DDR_PLL0(6), VDDR_CORE, VDD_MMC0, VDDA_0P85_DLL_MMC0 |
I |
VPP |
J |
MCU_PORz |
K |
MCU_OSC0_XI, MCU_OSC0_XO |
(1) VDDSHV_CANUART, VDDSHV_MCU, and
VDDSHVx [x=0-3] when operating at 3.3V.
(2) VDDSHV_CANUART, VDDSHV_MCU, and
VDDSHVx [x=0-3] when operating at 1.8V.
(3) VDDSHV5, and VDDSHV6 were
designed to support power-up, power-down, or dynamic voltage change without any
dependency on other power rails. This capability is required to support UHS-I SD
Cards.
(4) VDD_CANUART when connected to an
always-on power source for Partial IO low power mode.
(5) VDD_CANUART, VDD_CORE,
VDDA_CORE_CSI_DSI, VDDA_CORE_DSI_CLK, VDDA_CORE_USB0, and VDDA_DDR_PLL0 when
operating at 0.75V
(6) VDD_CANUART, VDD_CORE,
VDDA_CORE_CSI_DSI, VDDA_CORE_DSI_CLK, VDDA_CORE_USB0, and VDDA_DDR_PLL0 when
operating at 0.85V