Table 3. Power supply and SNVS domain signals (continued)
Item
Recommendation
Description
• PMIC_STBY_REQ—configurable output
• PMIC_ON_REQ—push-pull output
• TEST_MODE—on-chip pull-down
• POR—on-chip pull-up
• WAKEUP—the GPIO that wakes the
SoC up in the SNVS mode
• GPIO_SNVS_XX—on-chip pull-down
• Be careful to use SNVS signals to drive external load
as the SNVS GPIO drive is quite low, refer to the i.MX
RT1170 data sheet for details.
• By default, the functionality of GPIO_SNVS_XX pin
is determined by the part number. Tamper function
is available only on tamper-enabled parts, and GPIO
is the only available function on parts which do not
support tamper. The MUX_MODE must be configured
to select the function in both cases.
• The GPIO_SNVS_XX pins will automatically switch to
tamper function in the SNVS mode even on the part
where GPIO function is supported. For more details,
refer to ERR051122.
• Access delay occurs on the GPIO_SNVS_xx signals
due to the module's 32 kHz clock source.
3. Power ripple
Maximum ripple voltage limitation.
The common limitation for the ripple noise shall be less
than 5 % Vp-p of the supply voltage average value. The
related power rails affected are VDD_XXX, VDD_XXX_IN,
VDDA_1P0, VDD_XXX_ANA, VDD_XXX_DIG.
4. Supply
currents
Maximum supply currents comply with
maximum supply currents in data sheet
Concerning i.MX RT1170:
• The DCDC_DIG_X output power capacity is 850 mA
and DCDC_ANA_X output power capacity is 150 mA.
• Do not use DCDC_ANA_X to drive load higher
than 150mA.
• For frequencies higher than 600 MHz and up to 800
MHz, refer to the CM7 power source guideline table in
the i.MX RT1170 data sheet for automotive products.
Power Sequence Requirements:
• For power supply sequencing requirements, refer to Section 8 of the i.MX RT1170 data sheet.
The power control logic of the IMXRT1170 EVK board is shown in the following figure:
• It will power up SNVS first, then PMIC_REQ_ON will be asserted to enable external DC/DC to power up other power
domains.
• ON/OFF button is used to switch PMIC_REQ_ON to control power modes.
• RESET button and WDOG output are used to reset the system power.
NXP Semiconductors
Power supply
Hardware Development Guide for the MIMXRT1160/1170 Processor , Rev. 2, 09/2021
User Guide
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