NXP Semiconductors
UM10858
PN7462 family HW user manual
UM10858
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.4 — 14 May 2018
314514
33 of 345
6.1.1 Microcontroller supply
In order to use the PN7462 family as microcontroller with host interface following
voltages (minimum requirements) need to be supplied:
•
VBUS
•
PVDD_IN (if PVDD_OUT is not used, it needs to be shorted to GND)
•
DVDD pin must be connected to VDD and buffered with 1 µF capacitor to GND
The SPI/ I²C master interface requires additional supply:
•
PVDD_M_IN
shows the power supply of the chip (VBUS), including the supply of the digital
blocks (DVDD). The host interface pads are supplied using PVDD_IN and master
interface pads are supplied using PVDD_M_IN. The pads can be supplied using an
internal LDO, or using an external supply. The internal LDO requires that VBUS > 4 V.
When PVDD_LDO is used, the maximum total current available from PVDD_OUT for the
pads supply is 30 mA.
When an external source is used for PVDD_IN and PVDD_IN_M, PVDD_OUT must be
connected to the ground with a ground
resistance of less than 10 Ω.