NXP Semiconductors
S32K344
White Board
8 General functional description
8.1 MCU HW configuration
8.1.1 MCU power supply configuration
S32K344 has two power domains – VDD_HV_A and VDD_HV_B. They can be supplied
with either 5V or 3.3V. See below figure for PINs distribution for the two domains. The
white board optimizes the PINs assignment to minimize the usage of voltage level
shifters. VDD_HV_A is supplied with 5V and PINs in VDD_HV_A domain are mostly used
for 5V circuits on the board. VDD_HV_B is supplied with 3.3V and PINs in VDD_HV_B
domain are mostly used for 3.3V circuits on the board.
Figure 8. Pins distribution for different power domains
8.1.2 MCU clock settings
MCU can generate 320MHz PLL clock based on 16MHz external crystal. And in low-
power modes, it can use external 32KHz crystal to minimize the power consumption.
UM11919 All information provided in this document is subject to legal disclaimers. © 2023 NXP B.V. All rights reserved.
User manual Rev. 1.0 — 11 April 2023
COMPANY PUBLIC 15 / 32
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